内蒙古狼山地区早志留世石英闪长岩体的厘定及其地质意义

滕学建; 田健; 刘洋; 张永; 滕飞; 段霄龙

doi:10.3799/dqkx.2018.172

内蒙古狼山地区早志留世石英闪长岩体的厘定及其地质意义

doi: 10.3799/dqkx.2018.172

中国地质调查局天津地质调查中心, 天津 300170

基金项目:

阴山成矿带小狐狸山和雅布赖地区地质矿产调查项目 DD20160039

详细信息

作者简介:
滕学建(1980-), 男, 硕士学位, 高级工程师, 主要从事区域地质调查及岩浆岩岩石学的研究

通讯作者:
田健

中图分类号: P588.12+1
计量
- 文章访问数: 5358
- HTML全文浏览量: 2048
- PDF下载量: 62
- 被引次数: 0
出版历程
- 收稿日期: 2018-04-22
- 刊出日期: 2019-04-15

Definition and Geological Significance of Early Silurian Quartz Diorite Pluton in Langshan Area, Inner Mongolia

Tianjin Center of China Geological Survey, Tianjin 300170, China

摘要

摘要: 内蒙古狼山山脉西侧分布有零星的早古生代岩浆岩，早志留世侵入体主要出露于哈日音熬瑞-迈罕陶勒盖一带.该岩体岩性为石英闪长岩，LA-ICP-MS锆石U-Pb年龄显示，其²⁰⁶Pb/²³⁸U加权平均年龄为440±1 Ma.岩石富集大离子亲石元素Rb、K、Pb，不同程度地亏损高场强元素Nb、Ta、P、Ti；轻稀土富集，重稀土亏损，具有弱的负Eu异常，显示了岩浆弧的地球化学特征.ε_Hf（t）值为-12.1~-8.8及T_DM2在1 973~2 182 Ma之间，反映了源区以古元古代古老地壳为主，闪长质包体中的斜长石斑晶及矿物成因判别图解显示了岩体在形成过程中受到了岩浆混合作用.构造判别图解及Hf同位素特征表明该岩体可能形成于大陆边缘弧的构造背景.对比达茂旗、白乃庙地区新近发表的有关数据，早志留世石英闪长岩的岩石地球化学特征与之十分相似，由此可见，华北地块北缘早古生代俯冲带从白乃庙地区可以延伸到狼山地区.
- 内蒙古 /
- 狼山地区 /
- 早志留世 /
- 石英闪长岩 /
- 大陆边缘弧 /
- 岩石学
Abstract: The Early Paleozoic magmatites are sporadically distributed along the western side of the Langshan Mountains, Inner Mongolia.The Early Silurian rocks are mainly exposed in the zone of Hariyinaorui-Maihantaolegai.LA-ICP-MS zircon U-Pb dating shows that the ²⁰⁶Pb/²³⁸U weighted average age of quartz diorite is 440±1 Ma.The rocks show similar chondrite-normalized REE patterns, and display relatively high concentration of light rare earth elements (LREEs) but low contents of heavy rare earth elements (HREEs) with minor negative Eu anomalies. The overall chemical similarities of these rocks on the primitive mantle-normalized variation diagrams display affinity to arc signature; considering both tectonic discriminated diagrams and the Hf isotopic signature, it is proposed that the Langshan area was under the tectonic setting of continental margin arc during Early Silurian. It is concluded that the subduction zone of Early Paleozoic had been extended from the area of Damaoqi to Langshan, since these rocks show similar geochemical characteristics with the recently published data of Early Silurian quartz diorite in the area of Damaoqi and Bainaimiao.
- Inner Mongolia /
- Langshan area /
- Early Silurian /
- quartz diorite /
- continental margin arc /
- petrology

HTML全文

图 1 测区大地构造位置(a)和测区地质简图(b)

底图据Wang et al.(2015)

Fig. 1. The tectonic location and simplified geological map of the survey area

下载: 全尺寸图片幻灯片

图 2 那仁宝力格幅1:5万地质图

Q.第四系；K.白垩系；P_1-2ds.大石寨组；C₂a.阿木山组；Jxa.阿古鲁沟组；Chz.增隆昌组；Chs.书记沟组；Pt₁By.宝音图岩群；zxηγT₂.中三叠世中细粒二长花岗岩；zxπβηγP₁.早二叠世中细粒似斑状二长花岗岩；xδοP₁.早二叠世细粒石英闪长岩；xνP₁.早二叠世细粒辉长岩；zβηγC₂.晚石炭世中粒黑云母二长花岗岩; zψδοC₂.晚石炭世中粒角闪石英闪长岩；zxηγS₃.晚志留世中细粒二长花岗岩；xδοS₃.晚志留世细粒石英闪长岩；zxδοS₁.早志留世中细粒石英闪长岩；O₂？.中奥陶世.据中国地质调查局天津地质调查中心(2016，据内蒙古查干呼舒庙等六幅1:5万区域地质矿产调查地质图)

Fig. 2. The geological map of the survey area

下载: 全尺寸图片幻灯片

图 3 早志留纪侵入岩剖面图及采样点

据PM007实测剖面修改

Fig. 3. The profile and sampling point of Early Silurian intrusive rocks

下载: 全尺寸图片幻灯片

图 4 石英闪长岩的野外露头照片及岩相学特征

a.石英闪长岩定向构造；b.石英闪长岩中的包体；c.石英闪长岩中的大理岩捕掳体；d.角闪石反应边结构；e.闪长质包体中的斜长石斑晶；f.次生白云母

Fig. 4. Outcrop photos and photomicrographs of quartz diorite and dioritic inclusion, showing the typical textures

下载: 全尺寸图片幻灯片

图 5 石英闪长岩的矿物学特征及电子探针位置

Hbl.角闪石；Bt.黑云母；Pl.斜长石；Mic.微斜长石

Fig. 5. Mineralogical characteristics and electron probe position of quartz diorite

下载: 全尺寸图片幻灯片

图 6 灰白色片麻状中细粒石英闪长岩的锆石CL图像(a)和锆石U-Pb平均年龄、谐和图(b, c)

Fig. 6. CL imaging of zircons from quartz diorite (a) ²⁰⁶Pb/²³⁸U average age and concordia plots of zircons from quartz diorite (b, c)

下载: 全尺寸图片幻灯片

图 7 侵入岩的SiO₂-(Na₂O+K₂O)图解(a)、AFM图解(b)和K₂O-SiO₂图解(c)

图a据Middlemost(1994); 图b据Kuno(1968); 图c据Peccerillo and Taylor(1976).图 7a中，1.橄榄辉长岩；2a.碱性辉长岩；2b.亚碱性辉长岩；3.辉长闪长岩；4.闪长岩；5.花岗闪长岩；6.花岗岩；7.硅英岩；8.二长辉长岩；9.二长闪长岩；10.二长岩；11.石英二长岩；12.正长岩；13.副长石辉长岩；14.副长石二长闪长岩；15.副长石二长正长岩；16.副长石正长岩；17.副长石深成岩

Fig. 7. SiO₂-(Na₂O+K₂O) (a), AFM (b) and K₂O-SiO₂ (c) diagram of intrusive rocks

下载: 全尺寸图片幻灯片

图 8 微量元素蛛网图(a)和稀土元素配分曲线(b)

据Sun and McDonough(1989)

Fig. 8. Primitive mantle-normalized trace element spidergrams (a) and chondrite-normalized REE patterns (b)

下载: 全尺寸图片幻灯片

图 9 ε_Hf(t)-t演化图

底图据Yang et al.(2006)

Fig. 9. The ε_Hf(t)-t evolution diagram for quartz diorite

下载: 全尺寸图片幻灯片

图 10 角闪石成因图解(a)和黑云母分类图解(b)

图a据谢应雯和张玉泉(1990)；图b据杨文金等(1986)

Fig. 10. Origin diagram of hornblende (a) and classification diagram of biotite (b) from quartz diorite

下载: 全尺寸图片幻灯片

图 11 Sr/Y-Y判别图(a)和R₂-R₁图解(b)

图a据Defant and Drummond (1990), 图b据Batchelor and Bowden(1985).R₁=4Si-11(Na+K)-2(Fe+Ti)，R₂=6Ca+2Mg+Al.1.幔源花岗岩; 2.板块碰撞前消减地区花岗岩; 3.板块碰撞后隆起花岗岩; 4.晚造山期花岗岩; 5.非造山花岗岩; 6.地壳熔融的花岗岩(同碰撞); 7.造山后期花岗岩

Fig. 11. Tectonic setting determinant diagram of quartz diorite

下载: 全尺寸图片幻灯片

图 12 测区与达茂旗、白乃庙地区的石英闪长岩岩石地球化学特征对比

达茂旗地区样品据Jian et al.(2008)；白乃庙地区样品据Zhang et al.(2013).图a中数字解释同7a；图f中数字解释同图 11b

Fig. 12. The comparison of petrochemical characteristics for the survey area, Damaoqi and Bainaimiao

下载: 全尺寸图片幻灯片

参考文献(50)

Allen, M.B., Windley, B.F., Zhang, C., 1993.Palaeozoic Collisional Tectonics and Magmatism of the Chinese Tien Shan, Central Asia.Tectonophysics, 220(1-4):89-115. https://doi.org/10.1016/0040-1951(93)90225-9
Allen, M.B., Engör, A.M.C., Natal'in, B.A., 1995.Junggar, Turfan and Alakol Basins as Late Permian to?Early Triassic Extensional Structures in a Sinistral Shear Zone in the Altaid Orogenic Collage, Central Asia.Journal of the Geological Society, 152(2):327-338. https://doi.org/10.1144/gsjgs.152.2.0327
Batchelor, R.A., Bowden, P., 1985.Petrogenetic Interpretation of Granitoid Rock Series Using Multicationic Parameters.Chemical Geology, 48(1-4):43-55. https://doi.org/10.1016/0009-2541(85)90034-8
Coleman, R.G., 1989.Continental Growth of Northwest China.Tectonics, 8(3):621-635. https://doi.org/10.1029/tc008i003p00621
Defant, M.J., Drummond, M.S., 1990.Derivation of Some Modern Arc Magmas by Melting of Young Subducted Lithosphere.Nature, 347(6294):662-665. https://doi.org/10.1038/347662a0
Feng, J.Y., Xiao, W.J., Windley, B., et al., 2013.Field Geology, Geochronology and Geochemistry of Mafic-Ultramafic Rocks from Alxa, China:Implications for Late Permian Accretionary Tectonics in the Southern Altaids.Journal of Asian Earth Sciences, 78:114-142. https://doi.org/10.1016/j.jseaes.2013.01.020
Gao, J., Li, M.S., Xiao, X.C., et al., 1998.Paleozoic Tectonic Evolution of the Tianshan Orogen, Northwestern China.Tectonophysics, 287(1-4):213-231. https://doi.org/10.1016/s0040-1951(98)80070-x
Griffin, W.L., Wang, X., Jackson, S.E., et al., 2002.Zircon Chemistry and Magma Mixing, SE China:In-Situ Analysis of Hf Isotopes, Tonglu and Pingtan Igneous Complexes.Lithos, 61(3-4):237-269. https://doi.org/10.1016/s0024-4937(02)00082-8
Han, B.F., He, G.Q., Wang, X.C., et al., 2011.Late Carboniferous Collision between the Tarim and Kazakhstan-Yili Terranes in the Western Segment of the South Tian Shan Orogen, Central Asia, and Implications for the Northern Xinjiang, Western China.Earth-Science Reviews, 109(3-4):74-93. https://doi.org/10.1016/j.earscirev.2011.09.001
Jahn, B.M., Griffin, W.L., Windley, B., 2000.Continental Growth in the Phanerozoic:Evidence from Central Asia.Tectonophysics, 328(1-2):vii-x. https://doi.org/10.1016/s0040-1951(00)00174-8
Jian, P., Liu, D.Y., Kröner, A., et al., 2008.Time Scale of an Early to Mid-Paleozoic Orogenic Cycle of the Long-Lived Central Asian Orogenic Belt, Inner Mongolia of China:Implications for Continental Growth.Lithos, 101(3-4):233-259. https://doi.org/10.1016/j.lithos.2007.07.005
Kuno, H., 1968."Differentiation of Basaltic Magmas".In: Hess, H.Arie Poldervaart, A., eds., Basalts: The Poldervaart Treatise on Rocks of Basaltic Composition (vol.2).Interscience, New York, 623-688.
Li, C.D., Ran, H., Zhao, L.G., et al., 2012.LA-MC-ICPMS U-Pb Geochronology of Zircons from the Wenduermiao Group and Its Tectonic Significance.Acta Petrologica Sinica, 28(11):3705-3714(in Chinese with English abstract).
Li, H.K., Geng, J.Z., Hao, S., et al., 2009.Study on the Using LA-MC-ICPMS to Date the U-Pb Isotopic Age of Zircons.Bulletin of Mineralogy, 29(S1):600-601 (in Chinese with English abstract).
Liu, Y.S., Gao, S., Hu, Z.C., et al., 2010.Continental and Oceanic Crust Recycling-Induced Melt-Peridotite Interactions in the Trans-North China Orogen:U-Pb Dating, Hf Isotopes and Trace Elements in Zircons from Mantle Xenoliths.Journal of Petrology, 51(1-2):537-571. https://doi.org/10.1093/petrology/egp082
Ludwig, K.R., 2003.Users Manual for Isoplot 3.0: A Geochronological Toolkit for Microsoft Excel.Berkeley Geochronology Center Special Publication, Berkeley, 1-39.
Middlemost, E.A.K., 1994.Naming Materials in the Magma/Igneous Rock System.Earth-Science Reviews, 37(3-4):215-224. https://doi.org/10.1016/0012-8252(94)90029-9
Peccerillo, A., Taylor, S.R., 1976.Geochemistry of Eocene Calc-Alkaline Volcanic Rocks from the Kastamonu Area, Northern Turkey.Contributions to Mineralogy and Petrology, 58(1):63-81. https://doi.org/10.1007/bf00384745
Qian X.Y., Zhang Z.C., Chen Y., et al., 2017.Geochronology and Geochemistry of Early Paleozoic Igneous Rocks in Zhurihe Area, Inner Mongolia and Their Tectonic Significance.Earth Science, 42(9):1472-1494(in Chinese with English abstract). http://www.en.cnki.com.cn/Article_en/CJFDTotal-DQKX201709003.htm
Şengör, A.M.C., Natal'in, B.A., Burtman, V.S., 1993.Evolution of the Altaid Tectonic Collage and Palaeozoic Crustal Growth in Eurasia.Nature, 364(6435):299-307. https://doi.org/10.1038/364299a0
Sun, S.S., McDonough, W.F., 1989.Chemical and Isotopic Systematics of Oceanic Basalts:Implications for Mantle Composition and Processes.Geological Society, London, Special Publications, 42(1):313-345. https://doi.org/10.1144/gsl.sp.1989.042.01.19
Wang, Z.Z., Han, B.F., Feng, L.X., et al., 2015.Geochronology, Geochemistry and Origins of the Paleozoic-Triassic Plutons in the Langshan Area, Western Inner Mongolia, China.Journal of Asian Earth Sciences, 97:337-351. doi: 10.1016/j.jseaes.2014.08.005
Wilson, M., 1989.Igneous Petrogenesis.Unwin Hyman, London.
Windley, B.F., Allen, M.B., Zhang, C., et al., 1990.Paleozoic Accretion and Cenozoic Redeformation of the Chinese Tien Shan Range, Central Asia.Geology, 18(2):128. doi: 10.1130/0091-7613(1990)018<0128:PAACRO>2.3.CO;2
Windley, B.F., Alexeiev, D., Xiao, W.J., et al., 2007.Tectonic Models for Accretion of the Central Asian Orogenic Belt.Journal of the Geological Society, 164(1):31-47. doi: 10.1144/0016-76492006-022
Wu, F.Y., Yang, Y.H., Xie, L.W., et al., 2006.Hf Isotopic Compositions of the Standard Zircons and Baddeleyites Used in U-Pb Geochronology.Chemical Geology, 234(1-2):105-126. https://doi.org/10.1016/j.chemgeo.2006.05.003
Wu, Y.F., Zeng, J.N., Cao, J.J., et al., 2013.Zircon U-Pb Ages and Hf Isotopes of Hercynian Intrusion in Dongshengmiao, Inner Mongolia.Geological Science and Technology Information, 32(6):22-30(in Chinese with English abstract). http://www.en.cnki.com.cn/Article_en/CJFDTOTAL-DZKQ201306005.htm
Xiao, W.J., Han, C.M., Yuan, C., et al., 2008.Middle Cambrian to Permian Subduction-Related Accretionary Orogenesis of Northern Xinjiang, NW China:Implications for the Tectonic Evolution of Central Asia.Journal of Asian Earth Sciences, 32(2-4):102-117. https://doi.org/10.1016/j.jseaes.2007.10.008
Xiao, W.J., Zhang, L.C., Qin, K.Z., et al., 2004.Paleozoic Accretionary and Collisional Tectonics of the Eastern Tianshan (China):Implications for the Continental Growth of Central Asia.American Journal of Science, 304(4):370-395. https://doi.org/10.2475/ajs.304.4.370
Xie, Y.W., Zhang, Y.Q., 1990.Peculiarities and Genetic Significance of Hornblende from Granite in the Hengduanshan Region.Acta Mineralogica Sinica, 10(1):35-45(in Chinese with English abstract). http://en.cnki.com.cn/Article_en/CJFDTOTAL-KWXB199001005.htm
Xu, B., Charvet, J., Chen, Y., et al., 2013.Middle Paleozoic Convergent Orogenic Belts in Western Inner Mongolia (China):Framework, Kinematics, Geochronology and Implications for Tectonic Evolution of the Central Asian Orogenic Belt.Gondwana Research, 23(4):1342-1364. https://doi.org/10.13039/501100001809
Xu, Z., Han, B.F., Ren, R., et al., 2012.Ultramafic-Mafic Mélange, Island Arc and Post-Collisional Intrusions in the Mayile Mountain, West Junggar, China:Implications for Paleozoic Intra-Oceanic Subduction-Accretion Process.Lithos, 132-133:141-161. https://doi.org/10.1016/j.lithos.2011.11.016
Yang, J.H., Wu, F.Y., Shao, J.A., et al., 2006.Constraints on the Timing of Uplift of the Yanshan Fold and Thrust Belt, North China.Earth and Planetary Science Letters, 246(3-4):336-352. https://doi.org/10.1016/j.epsl.2006.04.029
Yang, W.J., Wang, L.K., Zhang, S.L., et al., 1986.Micas of the Two Series of Granites in South China.Acta Mineralogica Sinica, 6(4):298-307(in Chinese with English abstract). http://en.cnki.com.cn/Article_en/CJFDTOTAL-KWXB198604001.htm
Zeng, J.J., Zheng, Y.Y., Qi, J.H., et al., 2008.Foundation and Geological Significance of Adakitic Granite at Guyang of Inner Mongolia.Earth Science, 33(6):755-763(in Chinese with English abstract). http://d.old.wanfangdata.com.cn/Periodical/dqkx200806003
Zhang, S.H., Zhao, Y., Song, B., et al., 2009a.Contrasting Late Carboniferous and Late Permian-Middle Triassic Intrusive Suites from the Northern Margin of the North China Craton:Geochronology, Petrogenesis, and Tectonic Implications.Geological Society of America Bulletin, 121 (1-2):181-200.
Zhang, S.H., Zhao, Y., Kröner, A., et al., 2009b.Early Permian Plutons from the Northern North China Block:Constraints on Continental Arc Evolution and Convergent Margin Magmatism Related to the Central Asian Orogenic Belt.International Journal of Earth Sciences, 98(6):1441-1467. https://doi.org/10.1007/s00531-008-0368-2
Zhang, S.H., Zhao, Y., Song, B., et al., 2007.Carboniferous Granitic Plutons from the Northern Margin of the North China Block:Implications for a Late Palaeozoic Active Continental Margin.Journal of the Geological Society, 164(2):451-463. https://doi.org/10.1144/0016-76492005-190
Zhang, X.H., Wilde, S.A., Zhang, H.F., et al., 2011a.Early Permian High-K Calc-Alkaline Volcanic Rocks from NW Inner Mongolia, North China:Geochemistry, Origin and Tectonic Implications.Journal of the Geological Society, 168(2):525-543. doi: 10.1144/0016-76492010-094
Zhang, X.H., Mao, Q., Zhang, H.F., et al., 2011b.Mafic and Felsic Magma Interaction during the Construction of High-K Calc-Alkaline Plutons within a Metacratonic Passive Margin:The Early Permian Guyang Batholith from the Northern North China Craton.Lithos, 125(1-2):569-591. doi: 10.1016/j.lithos.2011.03.008
Zhang, W., Jian, P., Kröner, A., et al., 2013.Magmatic and Metamorphic Development of an Early to Mid-Paleozoic Continental Margin Arc in the Southernmost Central Asian Orogenic Belt, Inner Mongolia, China.Journal of Asian Earth Sciences, 72:63-74. https://doi.org/10.1016/j.jseaes.2012.05.025
Zhang, X.H., Gao, Y.L., Wang, Z.J., et al., 2012.Carboniferous Appinitic Intrusions from the Northern North China Craton:Geochemistry, Petrogenesis and Tectonic Implications.Journal of the Geological Society, 169(3):337-351. https://doi.org/10.1144/0016-76492011-062
Zhao, L.M., Takasu, A., Liu, Y.J., et al., 2017.Blueschist from the Toudaoqiao Area, Inner Mongolia, NE China:Evidence for the Suture between the Ergun and the Xing'an Blocks.Journal of Earth Science, 28(2):241-248. https://doi.org/10.1007/s12583-017-0721-0
李承东, 冉皞, 赵利刚, 等, 2012.温都尔庙群锆石的LA-MC-ICPMS U-Pb年龄及构造意义.岩石学报, 28(11):3705-3714. http://d.old.wanfangdata.com.cn/Periodical/ysxb98201211020
李怀坤, 耿建珍, 郝爽, 等, 2009.用激光烧蚀多接收器等离子体质谱仪(LA-MC-ICPMS)测定锆石U-Pb同位素年龄的研究.矿物学报, 29(S1):600-601. http://d.old.wanfangdata.com.cn/Conference/7298171
钱筱嫣, 张志诚, 陈彦, 等, 2017.内蒙古朱日和地区早古生代岩浆岩年代学、地球化学特征及其构造意义.地球科学, 42(9):1472-1494. http://earth-science.net/WebPage/Article.aspx?id=3650
吴亚飞, 曾键年, 曹建劲, 等, 2013.内蒙古东升庙海西期岩体锆石U-Pb年龄及Hf同位素特征.地质科技情报, 32(6):22-30. http://www.cnki.com.cn/Article/CJFDTOTAL-DZKQ201306005.htm
谢应雯, 张玉泉, 1990.横断山区花岗岩类中角闪石的标型特征及其成因意义.矿物学报, 10(1):35-45. doi: 10.3321/j.issn:1000-4734.1990.01.006
杨文金, 王联魁, 张绍立, 等, 1986.华南两个不同成因系列花岗岩的云母标型特征.矿物学报, 6(4):298-307. doi: 10.3321/j.issn:1000-4734.1986.04.002
曾俊杰, 郑有业, 齐建宏, 等, 2008.内蒙古固阳地区埃达克质花岗岩的发现及其地质意义.地球科学, 33(6):755-763. doi: 10.3321/j.issn:1000-2383.2008.06.003