Proto-Tethys Tectonic Evolution from Ordovician to Devonian in Southwestern Margin of Tarim Block, NW China
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摘要: 通过对塔里木西南地区奥陶系-泥盆系的钻井和露头碎屑岩样品开展锆石U-Pb年代学、地球化学和重矿物分析，探讨塔西南大陆边缘原特提斯洋的俯冲增生演化过程.碎屑锆石记录了482~443 Ma、438~425 Ma和414~406 Ma三期寒武纪以来的构造-热事件，以及840~750 Ma的新元古代裂谷岩浆事件.奥陶系-泥盆系碎屑岩具有高的SiO2含量和相对低的Al2O3和TFe2O3+MgO含量，以及弱-中等的Eu负异常、LREE相对富集和HREE分布较平坦的特征.地球化学图解反映晚奥陶统碎屑岩来源于大陆岛弧和活动大陆边缘环境，早志留世-中泥盆世期间物源区可能以大陆岛弧和被动陆缘环境为主，还间断出现少量活动大陆边缘环境，晚泥盆世以后主要呈现被动陆缘环境.重矿物组合指示早志留世至中泥盆世期间，中-酸性岩浆活动加剧，而基性岩浆活动趋弱，晚泥盆世以后陆壳基底或造山带已大规模隆升.塔西南边缘原特提斯洋构造演化以奥陶纪向北俯冲、志留纪弧后洋盆关闭-褶皱造山和泥盆纪后碰撞伸展为特征.Abstract: Geochemistry, zircon U-Pb dating and heavy mineral compositional analysis were carried out for the clastic rocks from Ordovician-Devonian drilling samples, to constrain the tectonic evolution of Proto-Tethys in southwestern Tarim. The zircon grains are divided into three genetic types, i.e. magmatic zircon, metamorphic zircon and trapped or residual zircon, recording the tectonic-thermal events in the periods of the 482-443 Ma, 438-425 Ma and 414-406 Ma since the Cambrian, as well as the Neoproterozoic rift magma events between 840 Ma and 750 Ma. The clastic rocks have high content of SiO2 but relatively low content of Al2O3 and TFe2O3+MgO. They are characterized by right-dip chondrite-normalized REE pattern and flat HREE distribution, with weak to medium Eu negative anomaly. The ratios of trace elements, such as Th/U ratio, Cr/Zr ratio, Rb/Cs ratio, and La/Sc, suggests the terrigenous clastic components were derived from the felsic rocks in upper crust. It is assumed that the tectonic setting of sedimentary basin was characterized by continental island arc and active continental margin in late Ordovician. From the Early Silurian to Middle Devonian, the provenance was then predominated by continental island arc and passive continental margin, and mingled with active continental margin slightly. After the Late Devonian, it gradually changed over to evidential passive continental margin. It is indicated by the heavy minerals that the medium to acid magma activity became frequent while the basic magma activity became quiet during the time from Early Silurian to Middle Devonian, and the mountain uplifted massively since Late Devonian. Thus, the tectonic evolution of Proto-Tethys in south-western margin of Tarim could be divided into three stages, i.e. the northward subduction in Ordovician, the closure of back-arc ocean and folding orogeny in Silurian, and post-collision extension in Devonian.
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Key words:
- Proto-Tethys /
- southwestern Tarim /
- western Kunlun /
- Paleozoic /
- tectonic setting /
- tectonics
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图 1 塔西南地区奥陶系泥盆系地层格架及采样点
Fig. 1. Stratigraphic correlation and sampling points of Ordovician to Devonian in Southwestern Tarim
图 2 巴楚隆起奥陶系-泥盆系碎屑岩典型钻井样品的镜下特征
a.样品BT5-01，层位D3d，中细粒石英砂岩，不同粒级呈纹层状分布；b.样品BT5-04，层位O3s，细中粒含钙质岩屑石英砂岩，岩屑组成包括粘土质硅质岩、粘土质板岩、绢云千枚岩等，个别碳酸盐化；c.样品HT1-04，层位S1k，细中粒石英砂岩，陆源碎屑呈次棱角状-次圆状，以中砂为主，细砂和粗砂较少；d.样品BC1-05，层位S1t，中细粒岩屑石英砂岩，填隙物由粘土质杂基、少量硅质胶结物组成，硅质胶结物重结晶呈次生加大边产出.陆源碎屑成分：Qtz.石英；Fsp.长石；Dtrs.岩屑
Fig. 2. Textures and primary minerals of the representative clastic rocks from Ordovician-Devonian in southwestern Tarim
图 3 塔西南-西昆仑地区奥陶系-泥盆系典型碎屑锆石的CL图像
Fig. 3. Representative CL images of the zircons from the clastic rocks in southwestern Tarim and west Kunlun
图 4 塔西南地区钻井和露头样品的碎屑岩锆石的U-Pb年龄特征
a.样品BC1-02的锆石U-Pb年龄谐和图；b.样品BC1-02的锆石U-Pb年龄频谱图；c.样品YB1-01的锆石U-Pb年龄谐和图；d.样品YB1-01的锆石U-Pb年龄频谱图；e.样品QT02的锆石U-Pb年龄谐和图；f.样品QT02的锆石U-Pb年龄频谱图
Fig. 4. Zircon U-Pb concordia diagrams of the clastic rocks collected from southwest Tarim
图 5 巴楚隆起奥陶系-泥盆系碎屑岩REE配分型式图和微量元素蛛网图
a.b.BC1井; c, d.BT5井; e, f.HT1井. REE标准化数据引自Boynton（1984）; 原始地幔标准化数据引自文献McDonough and Taylor（1991）
Fig. 5. REE patterns normalized to chondrite and spidergrams of trace elements contents normalized to primitive mantle
图 6 沉积再循环作用的Th/Sc-Zr/Sc判别图解
Fig. 6. Th/Sc-Zr/Sc discrimination for sedimentation recycling
图 7 巴楚隆起奥陶系-泥盆系碎屑岩重矿物含量（%）与重矿物指数
ATi指数=100×磷灰石(%)/(磷灰石(%)+电气石(%))，GZi指数=100×石榴子石(%)/(石榴子石(%)+锆石(%))，ZTR指数=100×(锆石(%)+电气石(%)+金红石(%))
Fig. 7. Heavy mineral contents (%) and indexes of the S-D clastic rocks collected from southwest Tarim
图 8 巴楚隆起奥陶系-泥盆系碎屑岩物源区构造环境判识图
底图据Bhatia and Crook（1986）；a. K2O/Na2O-SiO2图解；b. Ti/Zr-La/Sc图解；c. La/Y-Sc/Cr图解.构造环境：A.大洋岛弧；B.大陆岛弧；C.活动大陆边缘；D.被动大陆边缘
Fig. 8. Geochemical diagrams for provenance tectonic setting discrimination of clastic rocks
图 9 巴楚隆起奥陶系-泥盆系碎屑岩微量元素构造环境三角图解
底图据Bhatia and Crook（1986）；a.Th-Co-Zr/10图解；b. La-Th-Sc图解；c. Th-Sc-Zr/10图解.构造环境：A.大洋岛弧；B.大陆岛弧；C.活动大陆边缘；D.被动大陆边缘
Fig. 9. Triangular diagrams for provenance tectonic setting discrimination of clastic rocks
图 10 塔西南-西昆仑地区900~400 Ma期间的构造-热事件年代学记录
Fig. 10. Histograms show the statistics of zircon U-Pb ages between 900 Ma and 400 Ma in southwestern Tarim and western Kunlun area
图 11 塔西南边缘寒武纪-泥盆纪构造演化模式
SQT.南羌塘地块；TSH.甜水海地块；CKL.中昆仑地块；SWT.塔里木克拉通地块. a.寒武纪初期，康西瓦-麻扎主洋盆分别在~535 Ma、~500 Ma开始向南、北两侧俯冲，库地-其曼于特一带弧后洋盆随之开启; b.奥陶纪期间，原特提斯洋多岛弧盆系整体向北俯冲，塔西南地区处于活动大陆边缘; c.志留纪期间，库地-其曼于特洋盆闭合，塔西南大陆边缘碰撞造山，康西瓦-麻扎一带处于残留海环境; d.塔西南大陆边缘在造山后伸展环境下有基性岩墙侵入，主洋盆向南迁移到龙木措-双湖一带
Fig. 11. Model of tectonic evolution in southwestern margin of Tarim from Cambrian to Devonian
表 1 塔西南地区碎屑岩样品岩石薄片鉴定
Table 1. Microscopic identification of clastic rocks from southwestern Tarim
样号 层位 结构 构造 陆源碎屑 填隙物 副矿物 鉴定名称 BT5-01-01 D3d 中细粒砂状 纹层状 石英为主（约90%），少量岩屑和长石（5%~10%） 胶结物为2%~3%，以钙质为主，硅质少量，粘土质杂基 < 1% 锆石、电气石 中细粒石英砂岩 BT5-02-01 S1k 细粒砂状 块状 石英含量约为75%，岩屑约为20%，长石少见 胶结物为3%~5%，以钙质为主，硅质较少，粘土质杂基为1%~2% 电气石、锆石 细粒（含钙质）岩屑石英砂岩 BT5-04-01 O3s 细中粒砂状 块状 石英占70%~75%，岩屑占20%~25%，长石含量低 钙质胶结物为5%~10% 磷灰石、锆石、电气石 细中粒含钙质岩屑石英砂岩 HT1-01-01 D3d 含中粒细粒砂状 块状 石英为主（约80%），少量岩屑和长石（约10%） 钙质胶结物为10% 电气石、锆石 含中粒细粒钙质石英砂岩 HT1-03-01 S2y 含中粒细粒砂状 纹层状 石英含量为75%~80%，岩屑和长石为10%~15% 胶结物约为10%，以钙质为主，硅质较少 锆石、磷灰石、电气石 含中粒细粒钙质石英砂岩 HT1-04-01 S1k 细中粒砂 块状 石英占85%~90%，岩屑和长石约为10% 粘土质杂基含量为1%~2%，胶结物少量，以钙质为主 锆石、电气石 细中粒石英砂岩 BC1-01-01 D3d 细粒砂状 块状 石英为主（约90%），少量岩屑和长石（5%~10%） 硅质胶结物主（< 1%），粘土质杂基少 电气石、锆石 细粒石英砂岩 BC1-02-01 (S3-D2)k 细粒砂状 纹层状 石英、长石和岩屑等约占50%，白云石含量约为50% 填隙物含量较少 锆石 白云质细砂岩 BC1-03-01 (S3-D2)k 细粒砂状 纹层状 石英占85%~90%，岩屑和长石约为10% 胶结物为1%~3%，以钙质为主，硅质次之，铁质少量 锆石、电气石 细粒石英砂岩 BC1-04-01 S2y 粉砂状 纹层状 石英、长石和岩屑等约占90% 胶结物约为10%，以硅质为主，钙质很少 不透明矿物为主 粉砂岩 BC1-05-01 S1t 中细粒砂状 块状 石英约为75%，岩屑和长石为20%~25% 粘土质杂基主，约占1%~2%，硅质胶结物少 锆石 中细粒岩屑石英砂岩 QT02 (S3-D2)k 细粒砂状 块状 石英约为55%，岩屑约为35%，长石约为10% 胶结物约为5%，以钙质为主，硅质较少 电气石、锆石 细粒长石岩屑砂岩 
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表 2 BC1井和YB1井碎屑锆石同位素比值与U-Pb年龄
Table 2. Zircon U-Pb ages of clastic rocks from the BC1 well and YB1 well using SHRIMPS method
样号 U（10-6） Th（10-6） 232Th/238U Pbc (%) Pb*（10-6） 比值 年龄(Ma) 协和度（%） 207Pb/ 206Pb ±% 207Pb/235U ±% 206Pb/ 238U ±% 207Pb/206Pb 1σ 208Pb/232Th 1σ 206Pb/ 238U 1σ BC1-1 152 72 0.49 0.08 44.6 0.139 3 0.9 6.55 1.3 0.340 9 1.0 2 219 15 1 797 59 1 891.1 16.9 15 BC1-2 175 94 0.55 -0.03 25.0 0.139 3 1.6 1.68 1.8 0.166 0 0.9 1 022 31 1 001 15 990.2 7.9 3 BC1-3 167 70 0.44 0.20 14.0 0.139 3 2.3 0.80 2.5 0.097 7 0.9 572 50 584 15 601.1 5.2 -5 BC1-4 54 52 0.99 0.38 4.2 0.139 3 6.2 0.66 6.3 0.090 2 1.4 319 140 545 19 556.6 7.6 -75 BC1-5 63 62 1.02 0.10 14.5 0.139 3 2.2 3.45 2.5 0.268 6 1.2 1 488 42 1 488 32 1 533.6 16.6 -3 BC1-6 151 168 1.15 0.08 34.9 0.139 3 1.0 3.47 1.3 0.268 4 0.9 1 504 19 1 510 18 1 532.5 11.9 -2 BC1-7 191 274 1.48 -0.01 25.1 0.139 3 1.2 1.53 2.8 0.152 5 2.5 1 011 25 911 24 915.0 21.1 9 BC1-8 505 134 0.27 -0.03 56.7 0.139 3 0.9 1.16 1.1 0.130 7 0.7 755 19 794 11 792.0 5.0 -5 BC1-9 99 104 1.08 -0.18 14.2 0.139 3 2.9 1.70 3.4 0.167 7 1.7 1 027 58 986 25 999.7 16.0 3 BC1-10 84 56 0.70 0.05 11.8 0.139 3 2.1 1.60 2.4 0.164 4 1.1 941 43 988 20 981.3 10.0 -4 BC1-11 1 464 54 0.04 0.00 203.2 0.139 3 0.5 1.57 0.7 0.161 6 0.6 936 9 974 18 965.6 5.3 -3 BC1-12 46 38 0.84 0.23 10.3 0.139 3 1.9 3.32 2.4 0.257 2 1.5 1 500 36 1 486 33 1 475.3 19.5 2 BC1-13 127 56 0.45 0.02 35.4 0.139 3 0.9 5.13 1.3 0.324 1 1.0 1 876 16 1 757 28 1 809.6 15.6 4 BC1-14 247 57 0.24 0.08 64.7 0.139 3 0.7 4.61 1.7 0.304 6 1.6 1 794 12 1 323 37 1 714.2 23.6 4 BC1-15 152 140 0.96 0.08 28.8 0.139 3 1.2 2.58 1.8 0.220 8 1.3 1 309 23 1 275 21 1 286.2 15.7 2 BC1-16 1 374 275 0.21 0.03 182.1 0.139 3 0.5 1.50 0.8 0.154 2 0.6 940 10 883 9 924.7 5.1 2 BC1-17 1 203 762 0.65 0.03 327.4 0.139 3 0.6 11.11 0.9 0.316 7 0.6 3 213 9 624 6 1 773.8 9.7 45 BC1-18 151 26 0.18 0.03 59.2 0.139 3 0.6 10.29 1.0 0.455 0 0.9 2 497 10 2 269 44 2 417.5 17.4 3 BC1-19 1 084 704 0.67 0.03 314.3 0.139 3 0.3 7.31 0.6 0.337 2 0.6 2 427 4 1 244 9 1 873.2 9.6 23 BC1-20 246 168 0.70 0.01 104.7 0.139 3 1.0 11.43 1.3 0.495 6 0.8 2 531 18 2 460 25 2 594.9 17.5 -3 BC1-21 305 449 1.52 0.13 31.3 0.139 3 1.3 1.06 1.7 0.119 3 1.0 751 28 700 9 726.6 6.8 3 BC1-22 332 565 1.75 0.05 36.2 0.139 3 1.2 1.11 1.4 0.126 5 0.8 737 26 732 12 768.1 5.4 -4 BC1-23 54 51 0.99 0.37 15.0 0.139 3 1.6 4.82 2.1 0.323 5 1.4 1 766 30 1 700 36 1 806.6 21.4 -2 BC1-24 503 537 1.10 -0.01 97.1 0.139 3 0.7 2.66 1.0 0.224 8 0.7 1 334 14 1 289 10 1 307.3 7.8 2 BC1-25 362 248 0.71 -0.04 71.4 0.139 3 0.7 2.74 1.0 0.230 0 0.7 1 344 13 1 327 13 1 334.4 8.5 1 BC1-26 104 168 1.66 0.25 11.4 0.139 3 2.8 1.14 3.3 0.127 6 1.8 777 58 780 19 774.2 13.2 0 BC1-27 98 125 1.32 0.46 10.8 0.139 3 2.8 1.07 3.0 0.127 9 1.1 626 60 752 13 776.1 7.9 -24 BC1-28 48 82 1.77 1.25 4.9 0.139 3 8.1 0.92 8.9 0.116 8 3.7 506 177 686 34 712.0 24.7 -41 BC1-29 41 50 1.26 0.84 4.4 0.139 3 5.7 0.95 6.1 0.124 1 2.2 429 127 744 26 754.2 15.5 -76 BC1-30 279 138 0.51 0.06 32.7 0.139 3 1.3 1.24 1.5 0.136 6 0.8 802 27 808 13 825.5 5.9 -3 BC1-31 275 125 0.47 0.08 32.0 0.139 3 1.5 1.23 2.1 0.135 4 1.4 809 31 788 18 818.6 10.8 -1 BC1-32 436 236 0.56 -0.02 147.8 0.139 3 0.4 8.31 0.8 0.395 0 0.7 2 374 6 1 958 17 2 145.9 12.1 10 BC1-33 59 1 0.02 -0.74 8.5 0.139 3 3.6 1.83 3.8 0.169 5 1.3 1 156 71 3 600 1 010 1 009.1 12.3 13 BC1-34 447 425 0.98 0.00 51.2 0.139 3 1.3 1.23 1.6 0.133 4 0.9 833 28 789 9 807.5 6.5 3 BC1-35 154 99 0.66 -0.04 16.8 0.139 3 1.6 1.16 2.1 0.126 6 1.3 817 34 741 14 768.5 9.1 6 BC1-36 128 364 2.93 0.75 13.8 0.139 3 4.6 1.02 4.8 0.124 1 1.0 583 101 726 11 754.4 7.3 -29 BC1-37 72 166 2.38 0.00 7.3 0.139 3 2.5 1.01 2.8 0.117 5 1.2 687 54 711 14 716.4 8.3 -4 BC1-38 807 582 0.74 0.33 53.5 0.139 3 1.7 0.59 1.9 0.076 8 0.7 448 39 470 7 477.2 3.1 -6 BC1-39 622 460 0.76 0.20 40.0 0.139 3 1.6 0.57 2.1 0.074 7 1.3 418 36 453 8 464.5 5.8 -11 BC1-40 670 60 0.09 0.03 238.4 0.139 3 0.3 8.29 0.7 0.414 0 0.6 2 290 5 1 874 37 2 233.1 11.9 2 BC1-41 192 143 0.77 0.02 64.1 0.139 3 0.6 7.78 1.2 0.388 1 1.0 2 293 11 1 959 25 2 113.9 18.8 8 BC1-42 381 274 0.74 -0.02 82.8 0.139 3 0.6 3.39 0.9 0.253 1 0.7 1 568 11 1 576 19 1 454.6 9.0 7 BC1-43 249 124 0.52 0.14 29.0 0.139 3 1.4 1.22 1.8 0.135 2 1.0 790 30 800 14 817.4 7.7 -3 BC1-44 459 153 0.34 0.15 53.7 0.139 3 1.1 1.26 1.3 0.135 9 0.7 848 23 805 13 821.5 5.6 3 BC1-45 1 013 213 0.22 0.06 122.0 0.139 3 0.7 1.26 0.9 0.140 2 0.6 782 15 807 11 845.8 4.9 -8 BC1-46 39 33 0.86 -0.34 11.2 0.139 3 1.8 5.28 2.3 0.330 6 1.4 1 893 33 1 842 51 1 841.3 22.9 3 BC1-47 32 20 0.64 0.26 9.1 0.139 3 2.0 4.88 2.6 0.331 1 1.6 1 747 37 1 768 65 1 843.9 25.9 -6 BC1-48 288 303 1.09 0.30 17.1 0.139 3 3.2 0.52 3.3 0.068 7 0.8 403 72 415 7 428.5 3.4 -6 BC1-49 388 270 0.72 0.25 22.7 0.139 3 1.8 0.51 1.9 0.068 0 0.7 398 40 406 6 424.2 3.1 -7 BC1-50 49 32 0.68 1.18 3.0 0.139 3 7.2 0.54 7.4 0.070 3 1.6 444 161 434 23 438.1 6.7 1 BC1-51 288 263 0.94 0.08 17.1 0.139 3 1.9 0.52 2.1 0.069 1 0.9 402 43 422 7 430.9 3.6 -7 BC1-52 202 141 0.72 -0.25 21.5 0.139 3 2.2 1.13 2.4 0.124 2 0.9 811 46 750 15 754.7 6.1 7 BC1-53 239 155 0.67 -0.03 25.7 0.139 3 1.4 1.10 1.6 0.125 3 0.8 721 29 739 10 761.1 5.8 -6 BC1-54 203 51 0.26 0.00 86.3 0.139 3 0.5 11.45 0.9 0.494 2 0.8 2 538 8 2 510 87 2 589.0 16.8 -2 BC1-55 93 87 0.96 0.19 39.3 0.139 3 0.8 10.81 1.3 0.490 0 1.0 2 456 14 2 476 36 2 570.8 21.9 -5 BC1-56 304 231 0.78 0.19 17.8 0.139 3 2.4 0.50 2.5 0.067 9 0.8 342 54 420 7 423.6 3.3 -24 BC1-57 110 62 0.58 0.19 6.7 0.139 3 4.9 0.52 5.0 0.071 1 1.1 343 110 435 18 442.7 4.8 -29 BC1-58 56 53 0.97 -0.32 6.4 0.139 3 2.5 1.29 3.5 0.132 1 2.4 958 51 786 24 799.6 18.3 17 BC1-59 41 36 0.90 1.29 4.6 0.139 3 5.9 0.99 6.3 0.129 3 2.0 432 132 669 29 784.0 15.1 -82 BC1-60 773 205 0.27 0.01 318.0 0.139 3 0.3 10.69 0.7 0.479 1 0.6 2 475 4 2 401 63 2 523.3 13.0 -2 BC1-61 158 168 1.09 0.13 63.2 0.139 3 0.8 10.39 1.1 0.464 2 0.8 2 480 13 2 393 26 2 458.1 17.2 1 BC1-62 459 123 0.28 0.10 130.5 0.139 3 0.5 5.64 1.2 0.330 2 1.1 2 013 8 1 544 28 1 839.4 17.2 9 BC1-63 107 88 0.85 0.10 31.4 0.139 3 1.1 5.97 1.5 0.341 1 1.0 2 055 20 1 847 25 1 892.0 16.1 8 BC1-64 572 184 0.33 0.04 137.6 0.139 3 0.5 4.04 0.8 0.279 8 0.7 1 710 9 1 188 14 1 590.6 9.5 7 BC1-65 183 77 0.44 0.00 24.3 0.139 3 1.7 1.51 1.9 0.154 4 0.9 957 35 920 17 925.7 7.5 3 BC1-66 147 186 1.31 0.34 16.6 0.139 3 2.1 1.14 2.3 0.131 3 0.9 714 44 763 11 795.3 6.8 -11 BC1-67 74 85 1.19 -0.20 8.9 0.139 3 2.5 1.31 2.9 0.139 8 1.5 867 52 820 18 843.4 11.7 3 YB1-1 175 147 0.87 0.31 39.0 0.139 3 1.2 3.267 1.6 0.258 4 1.1 1 460 23 1 474 23 1 482.0 15.0 -2 YB1-2 469 24 0.05 0.22 48.8 0.139 3 2.1 1.029 2.3 0.120 8 1.0 667 45 736 13 735.2 7.1 -10 YB1-3 48 36 0.77 0.43 15.9 0.139 3 1.6 6.95 2.2 0.385 0 1.5 2 108 28 2 077 54 2 101.0 26.0 0 YB1-4 151 140 0.96 0.59 17.5 0.139 3 2.6 1.29 2.9 0.134 5 1.2 916 54 837 19 813.7 9.0 11 YB1-5 846 293 0.36 0.08 96.5 0.139 3 0.93 1.192 1.7 0.132 6 1.4 781 19 790 20 803.0 11.0 -3 YB1-6 230 163 0.73 0.48 14.1 0.139 3 3.5 0.541 3.7 0.071 0 1.2 423 78 449 11 442.1 5.0 -5 YB1-7 352 210 0.62 0.26 41.7 0.139 3 2.3 1.242 2.5 0.137 4 1.0 791 48 836 14 830.3 8.0 -5 YB1-8 461 486 1.09 0.35 52.5 0.139 3 1.4 1.222 1.8 0.131 9 1.0 842 30 872 12 799.1 7.6 5 YB1-9 291 149 0.53 0.17 39.5 0.139 3 1.3 1.539 1.7 0.157 4 1.1 954 26 1 008 17 942.5 9.5 1 YB1-10 112 72 0.66 0.38 33.1 0.139 3 1.2 6.63 2.5 0.342 8 2.2 2 229 21 1 490 50 1 901.0 37.0 15 YB1-11 94 55 0.61 0.75 10.9 0.139 3 3.8 1.196 4.1 0.134 9 1.3 751 81 824 28 816.0 10.0 -9 YB1-12 306 160 0.54 0.35 35.5 0.139 3 1.7 1.194 2.3 0.134 5 1.5 754 37 795 18 814.0 11.0 -8 YB1-13 461 301 0.68 2.49 55.9 0.139 3 3.9 1.268 4.1 0.137 5 1.0 832 82 837 35 831.4 8.1 0 YB1-14 69 58 0.87 1.06 8.0 0.139 3 5.0 1.173 5.2 0.133 5 1.5 733 110 815 33 808.0 11.0 -10 YB1-15 186 69 0.38 0.07 70.6 0.139 3 0.57 9.91 1.7 0.440 1 1.6 2 489 10 2 131 43 2 351.0 31.0 6 YB1-16 144 92 0.66 0.32 16.8 0.139 3 2.0 1.213 2.3 0.135 4 1.2 774 42 810 16 818.7 9.2 -6 YB1-17 158 133 0.87 0.21 22.0 0.139 3 1.6 1.634 2.0 0.161 5 1.2 1 024 32 960 16 965.0 11.0 6 YB1-18 255 230 0.93 0.38 30.1 0.139 3 1.8 1.243 2.1 0.136 7 1.1 804 39 798 13 826.4 8.4 -3 YB1-19 90 76 0.87 0.56 20.3 0.139 3 1.9 3.372 2.3 0.261 3 1.3 1 499 37 1 441 34 1 498.0 17.0 0 YB1-20 227 192 0.88 1.29 21.3 0.139 3 3.9 0.939 4.1 0.107 8 1.2 715 83 487 17 660.0 7.2 8 YB1-21 224 140 0.65 0.57 26.2 0.139 3 2.6 1.219 2.8 0.135 6 1.1 780 54 806 20 820.0 8.5 -5 YB1-22 78 55 0.72 0.36 22.1 0.139 3 1.6 4.94 2.0 0.327 0 1.3 1 793 29 1 783 41 1 825.0 20.0 -2 YB1-23 213 169 0.82 0.06 74.0 0.139 3 0.85 7.58 1.5 0.403 5 1.2 2 180 15 2 179 35 2 185.0 23.0 0 YB1-24 235 156 0.69 0.61 27.7 0.139 3 2.3 1.243 2.6 0.136 4 1.3 810 48 801 19 824.3 9.8 -2 YB1-25 80 73 0.94 0.37 8.7 0.139 3 3.3 1.163 3.6 0.126 2 1.4 833 69 765 20 766.0 10.0 8 YB1-26 549 552 1.04 0.12 61.3 0.139 3 1.3 1.168 1.7 0.129 9 1.0 782 28 789 10 787.4 7.4 -1 YB1-27 263 220 0.86 0.09 95.4 0.139 3 0.53 8.31 1.3 0.421 2 1.1 2 265 9 2 229 29 2 267.0 22.0 0 YB1-28 314 156 0.51 0.24 37.1 0.139 3 1.4 1.252 1.8 0.137 2 1.0 811 30 828 15 829.0 8.2 -2
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表 3 露头样品QT02碎屑锆石同位素比值与U-Pb年龄
Table 3. Zircon U-Pb ages of clastic rocks from the outcrops using LA-ICP-MS method
样品号 U（10-6） Th（10-6） Pb（10-6） Th/U 比值 年龄(Ma) 207Pb/ 235U 2σ 206Pb/ 238U 2σ 207Pb/ 206U 2σ 207Pb/ 235U 2σ 206Pb/ 238U 2σ 207Pb/ 206U 2σ QT02_1 263.3 178 54.6 0.66 1.018 0.021 0 0.115 7 0.001 0 0.063 6 0.001 3 711.0 11 705.9 5.8 708 45 QT02_2 631 574 106.3 0.87 0.536 0.010 0 0.071 1 0.000 5 0.054 9 0.001 0 435.3 6.6 442.7 3.1 388 40 QT02_3 332 225.4 92.6 0.66 1.602 0.024 0 0.164 2 0.001 1 0.071 0 0.001 2 969.7 9.4 979.9 6.2 950 33 QT02_4 420 247.8 44.6 0.57 0.545 0.013 0 0.071 4 0.000 6 0.055 4 0.001 4 440.8 8.5 444.6 3.3 416 52 QT02_5 196 728 128 3.10 0.537 0.023 0 0.068 2 0.000 9 0.056 5 0.002 2 435.0 14 425.1 5.4 440 81 QT02_6 537 86.2 32 0.14 1.439 0.020 0 0.150 5 0.001 1 0.069 3 0.000 9 904.2 8.4 903.8 5.9 905 28 QT02_7 307 246.8 48.8 0.73 0.609 0.012 0 0.077 7 0.000 6 0.056 4 0.001 1 481.6 7.7 482.6 3.7 452 43 QT02_8 378 212.5 36.7 0.53 0.524 0.013 0 0.069 6 0.000 6 0.055 2 0.001 5 426.7 8.9 433.6 3.4 389 59 QT02_9 941 753 243.3 0.74 1.201 0.014 0 0.131 3 0.000 9 0.066 5 0.000 7 800.2 6.4 795 5.3 817 21 QT02_10 1 003 55.2 21.9 0.03 0.646 0.037 0 0.065 5 0.002 8 0.060 5 0.001 1 500 22 408 17 607 36 QT02_11 215 305 121.8 1.36 1.545 0.028 0 0.160 8 0.001 2 0.070 3 0.001 2 950 12 960.8 6.6 925 35 QT02_12 234 202.5 143.6 0.89 3.223 0.042 0 0.254 3 0.001 8 0.092 5 0.001 1 1 461 10 1 460.7 9 1 473 22 QT02_13 757 466 93.1 0.64 0.557 0.009 1 0.070 3 0.000 6 0.058 1 0.001 0 449.1 5.9 437.8 3.4 520 37 QT02_14 316 146.7 33.4 0.50 0.580 0.016 0 0.075 8 0.000 7 0.056 0 0.001 6 464 10 470.9 4.4 418 65 QT02_15 941 411 217 0.45 1.965 0.021 0 0.184 4 0.001 4 0.078 3 0.000 6 1 102.9 7.1 1 090.6 7.4 1 151 17 QT02_16 278 351 166 1.15 1.698 0.024 0 0.167 3 0.001 2 0.074 2 0.001 0 1 007.6 9.2 997.3 6.4 1 036 27 QT02_17 183.3 173.2 35.1 0.91 0.574 0.018 0 0.073 4 0.000 6 0.057 4 0.001 9 458 12 456.4 3.8 453 73 QT02_18 386 164 60.3 0.32 1.432 0.028 0 0.150 8 0.001 5 0.070 8 0.001 3 901 12 905.1 8.2 942 37 QT02_19 393 346 195.1 0.79 3.267 0.045 0 0.259 2 0.001 8 0.092 7 0.001 0 1 472 11 1 485.4 9.2 1 477 21 QT02_20 126.8 154.2 129.3 0.93 12.990 0.170 0 0.487 7 0.004 9 0.195 5 0.002 0 2 677 13 2 560 21 2 785 17 QT02_21 138 189.6 48.2 0.86 2.210 0.045 0 0.200 2 0.001 5 0.080 9 0.001 7 1 183 14 1 176.5 7.9 1 206 41 QT02_22 155 204 201 1.28 7.125 0.095 0 0.390 0 0.003 1 0.132 1 0.001 7 2 125 12 2 122 14 2 120 23 QT02_23 142.5 162.3 29.1 1.14 0.512 0.032 0 0.065 1 0.000 7 0.056 9 0.003 5 413 21 406.5 4.1 380 130 QT02_24 139.2 63.2 42.4 0.45 3.288 0.059 0 0.257 7 0.002 0 0.092 4 0.001 9 1 476 14 1 478 10 1 460 40 QT02_25 100.1 105.8 136.1 1.05 15.280 0.330 0 0.551 1 0.007 2 0.197 5 0.003 5 2 835 19 2 829 30 2 808 27 QT02_26 305 176.6 147.6 0.58 4.914 0.053 0 0.321 2 0.001 8 0.110 6 0.001 1 1 803.3 9.2 1 795.3 8.7 1 805 18 QT02_27 280 159.3 71.7 0.56 1.637 0.027 0 0.165 5 0.001 1 0.071 7 0.001 2 983 10 987 6.2 963 34 QT02_28 71.6 45.1 37.5 0.64 5.200 0.120 0 0.333 0 0.003 6 0.112 6 0.002 6 1 847 20 1 852 18 1 832 42 QT02_29 933 372 76.3 0.40 0.564 0.009 4 0.072 6 0.000 4 0.056 2 0.000 9 453.6 6.1 451.9 2.5 456 40 QT02_30 478 162.4 62.6 0.34 1.282 0.021 0 0.140 9 0.000 9 0.065 9 0.001 1 836.6 9.5 849.5 5.2 794 35 QT02_31 648 48.4 19.9 0.07 1.453 0.021 0 0.151 4 0.001 0 0.069 4 0.000 9 911.3 8.3 908.7 5.8 904 28 QT02_32 279 300 101.5 0.95 1.112 0.028 0 0.123 4 0.001 0 0.065 1 0.001 6 759 14 750.3 6 769 53 QT02_33 444 228 44.1 0.51 0.535 0.017 0 0.070 2 0.000 7 0.055 4 0.001 8 435 12 437.5 4 392 70 QT02_34 917 126.5 54.3 0.14 1.504 0.019 0 0.156 2 0.000 9 0.069 6 0.000 9 931 7.7 935.6 5.1 909 25 QT02_35 287 171.5 77.0 0.58 1.615 0.035 0 0.160 3 0.001 4 0.072 9 0.001 5 973 14 958.2 7.9 1 001 43 QT02_36 286.8 238.1 99.9 0.83 1.462 0.031 0 0.152 7 0.001 2 0.069 1 0.001 4 913 13 915.9 6.5 891 43 QT02_37 445 124.7 134.2 0.28 8.314 0.091 0 0.415 9 0.002 4 0.144 5 0.001 2 2 264.1 9.9 2 242 11 2 278 14 QT02_38 481 256.8 52.2 0.53 0.573 0.015 0 0.073 3 0.000 5 0.056 5 0.001 4 460.8 8.9 456 2.8 458 53 QT02_39 308 280.7 61.3 0.91 0.626 0.021 0 0.072 8 0.000 6 0.062 4 0.002 0 491 13 452.7 3.8 637 72 QT02_40 201.1 196.7 36.2 0.98 0.500 0.023 0 0.065 9 0.000 6 0.054 9 0.002 5 408 16 411.2 3.8 346 99 QT02_41 219.3 169 32.6 0.77 0.544 0.024 0 0.069 9 0.000 6 0.056 5 0.002 5 440 15 435.4 3.9 425 92 QT02_42 55.3 86.8 101.4 1.54 11.000 0.180 0 0.471 1 0.003 9 0.169 2 0.003 0 2 520 15 2 488 17 2 541 30 QT02_43 326 136.1 29.8 0.41 0.595 0.016 0 0.077 7 0.000 7 0.055 5 0.001 6 473 10 482.5 4 411 65 QT02_44 462 314 63.4 0.67 0.546 0.014 0 0.072 0 0.000 6 0.054 5 0.001 3 441.1 9.1 447.9 3.8 381 57 QT02_45 56.2 60.4 21.1 1.07 1.093 0.068 0 0.126 6 0.001 7 0.063 0 0.004 1 741 32 767.9 9.7 600 130 QT02_46 537 340 81.0 0.62 0.671 0.014 0 0.083 0 0.000 6 0.058 8 0.001 3 521.2 8.6 513.9 3.7 535 48 QT02_47 432.7 353.5 73.0 0.81 0.553 0.014 0 0.072 4 0.000 6 0.055 3 0.001 3 446.9 9.3 450.3 3.4 405 52 QT02_48 740 580 120.7 0.78 0.573 0.011 0 0.074 0 0.000 5 0.056 1 0.001 1 459.3 7.2 460.1 3 439 43 QT02_49 208.8 196.9 234.9 0.94 10.604 0.090 0 0.474 3 0.002 4 0.161 9 0.001 5 2 487.9 7.9 2 504 10 2 473 16 QT02_50 59.8 40.9 7.2 0.68 0.492 0.059 0 0.066 3 0.001 2 0.054 2 0.006 5 391 40 414 7.6 140 230 QT02_51 675 323 65.3 0.47 0.559 0.011 0 0.072 4 0.000 5 0.056 0 0.001 2 451 7.1 450.3 3.1 440 45 QT02_52 408 91.4 36.2 0.23 1.396 0.022 0 0.145 5 0.001 3 0.069 5 0.001 1 886 9.1 875.6 7.3 903 31 QT02_53 576 66.5 26.7 0.11 1.390 0.021 0 0.147 4 0.001 2 0.068 4 0.001 0 883.2 9.0 886 6.6 870 30 QT02_54 184.2 90.1 17.6 0.48 0.528 0.026 0 0.071 4 0.000 8 0.053 2 0.002 6 426 17 444.7 4.7 290 100 QT02_55 127.6 98.9 34.6 0.77 1.147 0.038 0 0.127 8 0.001 2 0.064 9 0.002 2 771 18 775.3 6.6 730 71
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表 4 塔西南地区奥陶系-泥盆系碎屑岩样品的主量元素含量（%）
Table 4. Chemical compositions of major elements (%) of the clastic rocks from Ordovician-Devonian in Southwestern Tarim
样品原号 层位 SiO2 Al2O3 TFe2O3 MgO CaO Na2O K2O MnO TiO2 P2O5 烧失量 总量 FeO TFe2O3+MgO Al2O3/SiO2 K2O/Na2O Al2O3/(CaO+Na2O) CIA BT5-01-01 D3d 77.76 5.39 1.58 2.07 3.45 0.14 1.81 0.04 0.85 0.07 6.33 99.49 1.29 3.65 0.07 12.66 1.50 68.97 BT5-01-02 D3d 89.68 2.65 0.70 0.88 1.43 0.11 0.97 0.02 0.39 0.04 2.62 99.49 0.49 1.58 0.03 8.90 1.72 65.20 BT5-02-01 S1k 71.14 6.31 3.03 1.65 5.89 0.23 1.70 0.21 0.32 0.10 9.18 99.76 2.16 4.68 0.09 7.42 1.03 70.81 BT5-02-02 S1k 71.48 14.12 2.95 0.95 0.30 0.30 4.04 0.01 0.74 0.14 4.76 99.79 0.95 3.90 0.20 13.42 23.57 72.44 BT5-03-01 S1k 77.16 8.18 3.72 1.11 1.42 0.20 1.95 0.10 0.37 0.13 5.63 99.96 3.18 4.83 0.11 9.95 5.06 74.68 BT5-03-02 S1k 75.43 12.19 2.23 0.93 0.51 0.24 3.28 0.04 0.62 0.16 4.32 99.94 1.66 3.16 0.16 13.96 16.28 73.71 BT5-04-01 O3s 68.32 4.14 2.65 3.28 7.87 0.78 1.37 0.20 0.16 0.08 10.65 99.49 2.23 5.93 0.06 1.77 0.48 50.53 BT5-04-02 O3s 66.37 3.87 2.78 3.70 8.63 0.67 1.25 0.22 0.16 0.08 11.70 99.42 2.35 6.48 0.06 1.88 0.42 52.08 HT1-01-01 D3d 73.79 10.04 5.81 1.74 0.41 0.20 3.62 0.05 0.81 0.09 2.94 99.49 2.38 7.55 0.14 18.38 16.43 68.64 HT1-01-02 D3d 65.28 6.58 3.04 2.23 8.56 0.15 2.43 0.10 0.67 0.07 10.30 99.41 2.17 5.27 0.10 16.31 0.76 67.76 HT1-02-01 D3d 97.75 0.60 0.37 0.12 0.23 0.08 0.25 0.00 0.10 0.05 0.40 99.95 0.29 0.49 0.01 3.37 1.96 52.89 HT1-02-02 D3d 88.34 4.29 2.88 0.47 0.40 0.14 1.51 0.02 0.73 0.11 1.07 99.97 1.73 3.35 0.05 10.49 7.84 67.15 HT1-03-01 S2y 72.19 4.99 0.95 1.38 8.32 0.98 1.74 0.13 0.28 0.11 8.39 99.45 0.59 2.33 0.07 1.78 0.54 49.39 HT1-03-02 S2y 74.76 6.03 1.07 1.85 5.30 1.24 2.03 0.12 0.34 0.12 6.59 99.45 0.61 2.92 0.08 1.64 0.92 48.97 HT1-04-01 S1k 55.91 19.57 7.36 3.92 0.45 0.87 5.45 0.09 0.89 0.20 5.29 100.0 4.58 11.28 0.35 6.24 14.78 69.04 HT1-04-02 S1k 87.09 3.17 1.45 0.70 2.67 0.44 0.81 0.08 0.19 0.10 2.76 99.46 1.00 2.15 0.04 1.85 1.02 57.67 BC1-01-01 D3d 92.35 2.32 1.19 0.49 0.29 0.10 1.10 0.01 0.85 0.12 0.70 99.50 0.84 1.68 0.03 11.11 6.04 60.38 BC1-01-02 D3d 92.00 2.04 1.00 0.42 1.12 0.09 0.99 0.01 0.59 0.10 1.14 99.49 0.60 1.42 0.02 10.75 1.68 59.82 BC1-02-01 (S3-D2)k 58.75 11.12 4.73 5.38 4.80 1.14 3.40 0.08 0.70 0.18 9.70 99.98 2.44 10.11 0.19 2.98 1.87 59.91 BC1-02-02 (S3-D2)k 73.02 7.83 2.64 3.17 2.95 1.35 2.15 0.05 0.64 0.20 5.42 99.43 1.88 5.81 0.11 1.59 1.82 53.61 BC1-03-01 (S3-D2)k 66.24 5.31 2.80 0.98 11.11 1.12 1.60 0.16 0.34 0.11 9.63 99.40 1.72 3.78 0.08 1.43 0.43 49.48 BC1-04-01 S2y 57.52 18.18 7.52 3.63 0.38 1.08 4.78 0.08 0.76 0.14 5.48 99.54 2.60 11.15 0.32 4.43 12.49 67.53 BC1-04-02 S2y 60.94 16.36 7.44 3.20 0.53 1.31 4.02 0.08 0.75 0.17 4.74 99.53 2.46 10.64 0.27 3.07 8.91 65.36 BC1-05-01 S1t 84.78 5.51 3.83 0.88 0.53 0.52 1.36 0.06 0.27 0.09 1.65 99.48 2.99 4.71 0.06 2.60 5.25 63.36 BC1-05-02 S1t 80.33 7.96 4.62 1.29 0.26 0.65 1.96 0.06 0.42 0.10 1.87 99.51 3.49 5.91 0.10 3.03 8.81 65.11 注：CIA指数：Al2O3/(Al2O3+Na2O+CaO+K2O)×100，均以摩尔分数表示.CIA值校正根据沉积物样品中的CaO/Na2O的摩尔比值，当比值> 1时以Na2O的摩尔含量代替CaO含量，当比值< 1时则直接以CaO摩尔含量来计算CIA.
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表 5 塔西南地区奥陶系-泥盆系碎屑岩样品的微量、稀土元素含量（10-6）
Table 5. Chemical compositions of rare earth elements and trace elements (10-6) of the clastic rocks from Ordovician-Devonian in southwestern Tarim
样品原号 层位 Rb Ce Pr Nd Sm Eu Gd Tb Dy Ho Er Tm Yb Lu Y Sc BT5-01-01 D3d 17.80 32.00 3.86 14.60 2.54 0.54 2.11 0.38 2.12 0.45 1.31 0.24 1.57 0.23 12.30 3.25 BT5-01-02 D3d 6.78 12.70 1.52 5.94 1.15 0.28 1.00 0.19 0.96 0.20 0.56 0.10 0.68 0.10 5.38 1.17 BT5-02-01 S1k 24.90 46.40 5.64 22.00 4.09 0.93 3.78 0.65 3.56 0.71 1.95 0.32 2.08 0.31 19.80 5.11 BT5-02-02 S1k 59.30 118.00 11.90 43.20 6.89 1.33 5.81 0.91 4.78 0.93 2.85 0.49 3.25 0.48 25.30 6.67 BT5-03-01 S1k 20.70 39.40 4.78 18.80 3.70 0.77 3.34 0.61 3.31 0.65 1.84 0.30 1.98 0.29 18.10 6.20 BT5-03-02 S1k 49.50 104.00 10.90 41.60 7.07 1.40 5.87 0.98 5.07 0.97 2.81 0.47 3.12 0.46 27.00 6.47 BT5-04-01 O3s 13.60 24.60 3.14 12.50 2.62 0.61 2.48 0.46 2.45 0.48 1.33 0.22 1.38 0.19 14.40 2.95 BT5-04-02 O3s 12.70 22.50 2.83 11.40 2.37 0.50 2.28 0.42 2.23 0.44 1.26 0.20 1.31 0.19 13.30 2.88 HT1-01-01 D3d 28.80 62.30 6.79 26.20 5.21 1.19 4.52 0.83 4.35 0.85 2.36 0.40 2.56 0.36 22.50 10.00 HT1-01-02 D3d 28.90 55.00 6.70 26.30 4.81 1.11 4.25 0.80 4.47 0.91 2.56 0.43 2.72 0.38 24.90 8.74 HT1-02-01 D3d 5.19 7.37 1.08 4.25 0.78 0.18 0.65 0.11 0.61 0.11 0.31 0.05 0.32 0.04 3.27 0.71 HT1-02-02 D3d 28.40 41.10 5.06 16.90 2.44 0.51 2.21 0.36 1.84 0.38 1.13 0.20 1.34 0.20 10.60 2.95 HT1-03-01 S2y 18.20 21.20 4.30 17.10 3.15 0.70 2.67 0.44 2.24 0.42 1.15 0.19 1.24 0.18 12.20 2.94 HT1-03-02 S2y 18.40 22.30 4.27 17.00 3.09 0.67 2.55 0.45 2.21 0.42 1.19 0.20 1.21 0.18 12.10 3.19 HT1-04-01 S1k 69.50 106.00 10.40 34.20 5.41 1.13 5.06 0.82 4.72 0.97 3.11 0.55 3.68 0.54 25.70 18.10 HT1-04-02 S1k 16.10 35.10 4.13 16.40 2.93 0.67 2.53 0.46 2.38 0.45 1.18 0.20 1.21 0.17 12.90 2.95 BC1-01-01 D3d 26.30 51.80 6.25 23.90 3.72 0.71 3.01 0.47 2.27 0.42 1.19 0.18 1.12 0.16 11.60 2.27 BC1-01-02 D3d 15.90 29.80 3.43 13.00 2.16 0.50 1.91 0.32 1.61 0.31 0.85 0.13 0.85 0.12 8.27 1.95 BC1-02-01 (S3-D2)k 36.40 66.60 8.32 31.50 5.63 1.23 4.94 0.85 4.38 0.87 2.51 0.42 2.60 0.38 23.70 11.10 BC1-02-02 (S3-D2)k 25.60 46.80 6.27 25.40 5.08 0.98 4.58 0.79 4.04 0.77 2.14 0.35 2.14 0.31 21.50 6.12 BC1-03-01 (S3-D2)k 28.30 44.50 6.00 23.10 4.27 0.96 3.79 0.71 3.90 0.78 2.22 0.38 2.47 0.35 22.90 4.97 BC1-04-01 S2y 45.90 82.60 9.75 35.80 6.01 1.14 4.84 0.86 4.64 0.96 2.86 0.51 3.23 0.47 25.80 17.50 BC1-04-02 S2y 43.30 89.40 10.10 39.10 7.02 1.42 5.67 0.96 5.03 1.03 3.00 0.50 3.23 0.47 27.40 15.60 BC1-05-01 S1t 30.20 63.60 7.22 29.20 6.01 1.32 5.01 0.90 4.50 0.81 2.17 0.34 2.11 0.30 23.90 4.55 BC1-05-02 S1t 37.90 77.10 8.58 33.20 6.16 1.30 5.18 0.90 4.62 0.90 2.54 0.42 2.59 0.37 25.40 6.68 样品原号 层位 Rb Ba Th U Ta Nb Sr Zr Hf ΣREE LREE HREE LREE/HREE LaN/YbN δEu δCe BT5-01-01 D3d 42.50 94.50 7.48 1.32 0.04 0.17 53.80 364.00 8.70 79.75 71.34 8.41 8.48 8.13 0.70 0.90 BT5-01-02 D3d 22.90 188.00 2.66 0.54 0.41 5.11 48.50 115.00 3.06 32.16 28.37 3.78 7.50 7.19 0.79 0.93 BT5-02-01 S1k 44.70 406.00 8.52 2.55 0.48 6.95 49.50 348.00 8.62 117.32 103.96 13.36 7.78 8.59 0.71 0.92 BT5-02-02 S1k 126.00 390.00 18.50 3.02 0.03 0.91 72.00 464.00 11.60 260.12 240.62 19.50 12.34 13.09 0.63 1.03 BT5-03-01 S1k 54.00 199.00 8.89 2.94 0.55 7.57 31.90 298.00 7.57 100.47 88.15 12.32 7.16 7.50 0.66 0.94 BT5-03-02 S1k 101.00 322.00 15.10 3.12 0.02 0.37 74.60 366.00 9.63 234.22 214.47 19.75 10.86 11.38 0.65 1.05 BT5-04-01 O3s 37.00 619.00 4.44 1.65 0.27 3.89 126.00 82.60 2.40 66.06 57.07 8.99 6.35 7.07 0.72 0.89 BT5-04-02 O3s 33.20 1 176.00 3.86 2.41 0.26 3.74 137.00 122.00 3.32 60.63 52.30 8.32 6.28 6.95 0.65 0.88 HT1-01-01 D3d 93.60 387.00 11.30 3.60 0.04 2.10 55.80 209.00 5.87 146.71 130.49 16.22 8.04 8.07 0.73 1.05 HT1-01-02 D3d 59.80 318.00 8.01 1.35 0.13 5.33 95.40 137.00 3.98 139.34 122.82 16.52 7.44 7.62 0.73 0.93 HT1-02-01 D3d 4.60 42.90 1.31 0.31 0.18 2.46 7.50 32.00 0.92 21.04 18.84 2.20 8.58 11.71 0.75 0.72 HT1-02-02 D3d 29.50 151.00 6.88 3.30 0.03 0.18 31.70 160.00 4.35 102.05 94.41 7.65 12.35 15.20 0.66 0.78 HT1-03-01 S2y 34.60 977.00 5.18 1.48 0.48 6.10 88.20 113.00 3.13 73.18 64.65 8.53 7.58 10.53 0.72 0.57 HT1-03-02 S2y 39.80 623.00 6.19 1.81 0.55 7.12 82.20 115.00 3.30 74.14 65.73 8.41 7.82 10.91 0.70 0.59 HT1-04-01 S1k 163.00 658.00 15.50 6.64 0.70 13.00 64.20 277.00 7.43 246.09 226.64 19.45 11.65 13.55 0.65 0.86 HT1-04-02 S1k 22.30 199.00 5.81 1.13 0.36 4.42 42.20 148.00 4.11 83.91 75.33 8.58 8.78 9.54 0.73 1.03 BC1-01-01 D3d 18.80 148.00 6.49 1.16 0.02 0.11 23.00 151.00 4.01 121.50 112.68 8.82 12.78 16.84 0.63 0.96 BC1-01-02 D3d 16.90 181.00 4.11 0.90 0.01 0.12 25.00 87.20 2.39 70.89 64.79 6.10 10.63 13.47 0.74 0.94 BC1-02-01 (S3-D2)k 99.00 413.00 11.90 2.19 1.02 14.50 52.00 289.00 7.25 166.62 149.68 16.94 8.83 10.04 0.70 0.90 BC1-02-02 (S3-D2)k 57.00 3 201.00 9.23 1.58 0.98 13.00 65.30 185.00 5.52 125.24 110.13 15.11 7.29 8.58 0.61 0.88 BC1-03-01 (S3-D2)k 47.70 257.00 9.02 3.84 0.55 7.33 60.80 285.00 7.11 121.72 107.13 14.60 7.34 8.22 0.71 0.80 BC1-04-01 S2y 180.00 1 273.00 15.50 3.41 1.21 16.40 65.60 187.00 5.49 199.57 181.20 18.37 9.87 10.19 0.63 0.91 BC1-04-02 S2y 157.00 623.00 15.80 3.23 1.25 17.10 59.30 252.00 6.49 210.23 190.34 19.89 9.57 9.62 0.67 1.01 BC1-05-01 S1t 40.30 362.00 7.07 3.08 0.43 6.38 40.60 304.00 7.31 153.70 137.55 16.15 8.52 10.27 0.71 1.02 BC1-05-02 S1t 60.50 331.00 8.59 1.51 0.64 9.33 36.40 260.00 6.40 181.76 164.24 17.52 9.37 10.50 0.68 1.01
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表 6 塔西南地区奥陶系-泥盆系碎屑岩样品的地球化学指标之间的相关系数
Table 6. The correlation coefficient between different geochemical indexs of the clastic rocks from Ordovician-Devonian in southwestern Tarim
Zr Al2O3 P2O5 TiO2 K2O CIA ΣREE LREE/HREE LaN/ YbN Th/Sc Zr/Sc La/Sc Zr 1 Al2O3 0.535 980 1 P2O5 0.403 791 0.712 600 1 TiO2 0.387 641 0.582 856 0.492 777 1 K2O 0.492 926 0.976 697 0.678 048 0.666 125 1 CIA -0.274 350 -0.838 120 -0.748 460 -0.382 740 -0.837 010 1 ΣREE 0.694 978 0.869 718 0.693 461 0.604 919 0.848 810 -0.633 160 1 LREE/HREE 0.280 484 0.332 392 0.374 307 0.625 594 0.348 844 -0.049 750 0.540 104 1 LaN/YbN 0.004 533 0.073 069 0.302 978 0.404 503 0.100 026 0.052 764 0.278 441 0.902 984 1 Th/Sc 0.090 854 -0.470 060 -0.250 070 -0.007 500 -0.451 920 0.592 935 -0.226 880 0.415 966 0.460 187 1 Zr/Sc 0.301 927 -0.465 880 -0.458 600 -0.098 910 -0.484 250 0.615 316 -0.311 640 0.069 754 0.016 341 0.753 603 1 La/Sc -0.03 827 -0.451 380 -0.180 110 0.016 275 -0.431 570 0.561 370 -0.122 430 0.610 944 0.740 859 0.873 204 0.520 510 1
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表 7 塔西南地区奥陶系-泥盆系碎屑岩样品的重矿物组成
Table 7. The heavy mineral composition of the clastic rocks from Ordovician-Devonian in southwestern Tarim
样品 层位 锆石 磷灰石 金红石 锐钛矿 黄铁矿 电气石 白钛石 赤褐铁矿 磁铁矿 石榴石 重晶石 方铅矿 榍石 钛铁矿 其余 BC1-01 D3d 15.5 13.2 0.8 1.2 17.0 20.8 24.6 / 0.0 0.3 / 0.4 / / 6.3 BC1-02 (S3-D2)k 15.4 3.1 0.2 0.0 2.8 5.2 0.9 5.2 0.0 0.0 58.6 0.1 / / 8.5 BC1-03 (S3-D2)k 17.4 7.9 2.8 0.0 0.0 2.8 6.2 46.6 0.5 7.3 / / / / 8.5 BC1-04 S2y 0.0 / / / 0.0 / / 90.9 0.0 / / / / / 9.1 BC1-05 S1t 45.0 0.4 4.6 0.0 6.0 6.9 10.8 0.8 0.0 17.2 0.0 0.6 0.0 0.0 7.9 BT5-01 D3d 18.6 4.4 0.8 0.0 16.3 38.5 6.6 / 0.0 / / / 7.1 0.9 6.9 BT5-02 S1k 0.7 0.0 0.1 / 94.9 / / / 0.0 / / / / / 4.2 BT5-03 S1k 1.1 0.2 0.1 / 92.9 0.3 0.0 / 0.0 / / / / / 5.4 BT5-03-a1 S1k 24.0 14.7 4.3 0.0 43.0 3.7 6.3 0.0 0.0 0.3 3.8 BT5-03-a2 S1k 11.2 2.4 1.4 0.0 73.6 5.2 1.7 0.0 0.0 1.1 0.4 2.9 BT5-04 O3s 20.4 1.8 3.4 / 0.6 28.7 8.0 0.0 0.0 3.5 24.5 / / / 9.2 HT1-01 D3d 6.3 0.0 0.3 0.1 0.0 3.5 32.0 55.1 0.2 0.0 / / / / 2.6 HT1-02 D3d 20.7 10.4 1.8 0.2 0.0 10.2 14.8 38.6 0.2 / / / / / 3.3 HT1-03 S2y 21.5 4.1 2.4 0.0 0.0 5.0 3.1 61.4 0.3 / 0.5 / / / 2.1 HT1-04 S1k 6.5 0.6 0.4 0.0 78.3 2.7 4.0 / 0.0 0.9 / / / / 6.5 注：“/”表示未检测到.
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