西藏中拉萨地块门巴花岗闪长岩成因及深部动力学过程

王旭辉; 郎兴海; 梁海辉; 杜良艺; 邓煜霖; 何青; 董咪

doi:10.3799/dqkx.2022.167

西藏中拉萨地块门巴花岗闪长岩成因及深部动力学过程

doi: 10.3799/dqkx.2022.167

王旭辉^1, ,,
郎兴海^1, , ,,
梁海辉²,
杜良艺¹,
邓煜霖¹,
何青¹,
董咪¹

1.
成都理工大学地球科学学院, 四川成都 610059
2.
华东冶金地质勘查物探队, 安徽芜湖 241000

基金项目:

四川省科技计划项目 2020JDJQ0042

国家自然科学基金项目 41972084

成都理工大学珠峰科学研究计划 2020ZF11407

西北大学大陆动力学国家重点实验室开放基金 18LCD04

自然资源部深地资源成矿作用与矿产预测重点实验室开放基金 ZS1911

中国地质调查局项目 DD20190167

中国地质调查局项目 DD20160346

详细信息

作者简介:
王旭辉（1993-），男，博士，矿物学、岩石学、矿床学专业，主要从事青藏高原岩浆-成矿作用研究. ORCID：0000-0002-3216-3299. E-mail：wangxuhui618@126.com

通讯作者:
郎兴海，ORCID：0000-0002-3309-3667. E-mail: langxinghai@126.com

中图分类号: P581
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出版历程
- 收稿日期: 2022-12-27
- 刊出日期: 2024-02-25

Petrogenesis and Geodynamic Processes of the Mamba Granodiorite, Central Lhasa Block, Xizang

Wang Xuhui^{1
,
,},
Lang Xinghai^{1
, ,
,},
Liang Haihui²,
Du Liangyi¹,
Deng Yulin¹,
He Qing¹,
Dong Mi¹

1.
College of Earth Science, Chengdu University of Technology, Chengdu 610059, China
2.
East China Metallurgical Geologlcal Prospecting Bureau of Geophysiical Prospecting Team, Wuhu 241000, China

摘要

摘要: 为了探讨拉萨地块晚白垩世岩浆作用的深部动力学机制，对中拉萨地块南缘门巴花岗闪长岩开展了岩相学、年代学、岩石地球化学及矿物化学研究. LA-ICP-MS锆石U-Pb定年表明门巴花岗闪长岩侵位于晚白垩世（83.2 Ma±0.9 Ma）. 岩石地球化学特征显示门巴花岗闪长岩为埃达克质岩石，电子探针数据揭示斜长石属于中-奥长石（An：16.2~34.7）. 综合分析本文认为门巴花岗闪长岩的母岩浆为幔源镁铁质岩浆底侵诱发加厚下地壳熔融并与之发生混合作用的结果. 结合晚白垩世岩浆岩成岩环境及时空分布特征，认为拉萨地块南部晚白垩世岩浆作用主要受新特提斯洋脊俯冲控制，软流圈地幔沿洋中脊裂隙板片窗上涌诱引了南拉萨地块南缘晚白垩世大规模岩浆作用，而软流圈物质沿切割洋中脊的转换断层撕裂板片窗上涌诱发了近似垂直前者分布的小规模板内岩浆作用.
- 拉萨地块 /
- 晚白垩世 /
- 埃达克质岩石 /
- 岩浆混合 /
- 洋脊俯冲 /
- 板片窗 /
- 岩石学
Abstract: In order to discuss thedynamic mechanism of Late Cretaceous magmatism in the Lhasa block, this paper carried out petrographic, chronological, geochemical and mineral chemistry studies on the Menba granodiorites in the southern margin of the central Lhasa block. LA-ICP-MS zircon U-Pb dating indicates that the Menba granodiorites emplaced in the Late Cretaceous (83.2 Ma±0.9 Ma). The geochemical characteristics show that the Menba granodiorites are adakitic rocks. Electron microprobe data reveal that plagioclase belongs to andesine and oligoclase (An=16.2-34.7). This paper believes that the parent magmas of the Menba granodiorites may be a result of magma mixing between mantle- and crust-derived magmas and the mantle-derived magma underplating may have led to partial melting of the thickened lower crust and then reactions between them. Combined with the diagenetic environment and spatial distribution characteristics of the Late Cretaceous magmatic rocks. This paper concludes that the Late Cretaceous magmatism in the southern Lhasa block was mainly controlled by the ridge subduction of the Neo-Tethys. The upwelling of asthenosphere mantle along the slab window of the mid-ocean ridge induced the Late Cretaceous large-scale magmatism in the southern margin of the south Lhasa block, while the upwelling of asthenosphere material along the tear slab window of transition fault that cuts the mid-ocean ridge induced the small-scale intraplate magmatic belt, which approximately perpendicular to the large-scale magmatism in the southern margin of the south Lhasa block.
- Lhasa block /
- Late Cretaceous /
- adakitic rock /
- magma mixing /
- ridge subduction /
- slab window /
- petrology

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图 1 （a）青藏高原构造单元划分示意图；（b）拉萨地块南部冈底斯岩浆带展布图，文献年龄数据来源见表 1；（c）门巴研究区地质图

BNS. 班公湖-怒江缝合带；SNM. 狮泉河-纳木错蛇绿岩带；LMF. 洛巴堆-米拉山断裂带；IYS. 雅鲁藏布江缝合带

Fig. 1. (a) Tectonic framework of Xizang an Plateau; (b) distribution of Gangdese magmatic belt in the southern Lhasa block, andthe age data from literature are shown in the Table 1; (c) geological map of Menba area

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图 2 门巴花岗闪长岩野外及显微照片

a. 花岗闪长岩包含巨晶斜长石；b. 花岗闪长岩包含巨晶钾长石；c. 花岗闪长岩包含镁铁质暗色包体；d和e. 花岗闪长岩显微照片；f. 镁铁质暗色包体显微照片；Kfs. 钾长石；Pl. 斜长石；Hbl. 角闪石；Qtz. 石英；Bi. 黑云母；Ap. 磷灰石

Fig. 2. Field observations and microscope photos of the Menba granodiorites

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图 3 门巴花岗闪长岩LA-ICP-MS锆石U-Pb年龄谐和图及加权平均年龄图解

Fig. 3. LA-ICP-MS zircon U-Pb concordia and weighted average age diagrams for the Menba granodiorites

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图 4 门巴花岗闪长岩(Na₂O+K₂O)-SiO₂（a）、(K₂O+Na₂O-CaO)-SiO₂（b）、Sr/Y-Y（c）图解

文献数据来源 Meng et al.（2014）和Liu et al.（2019）

Fig. 4. (Na₂O+K₂O)-SiO₂ (a), (K₂O+Na₂O-CaO)-SiO₂(b), and Sr/Y-Y (c) diagrams for the Menba granodiorites

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图 5 门巴花岗闪长岩稀土元素球粒陨石标准化配分图（a）和微量元素原始地幔标准化蛛网图（b）

球粒陨石标准化值和原始地幔标准化值据 Sun and McDonough（1989）；文献数据来源 Meng et al.（2014）和Liu et al.（2019）

Fig. 5. Chondrite-normalized REE distribution patterns (a) and primitive mantle-normalized trace element spidergrams (b) for the Menba granodiorites

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图 6 门巴花岗闪长岩斜长石晶体核幔边An值变化

Fig. 6. Variation of An value at the core and mantle of plagioclases from the Menba granodiorites

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图 7 门巴花岗闪长岩斜长石Or-Ab-An三角图

Fig. 7. Triangular Or-Ab-An plot of plagioclases from the Menba granodiorites

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图 8 门巴花岗闪长岩Th/Nd-Th（a）、1/V-Rb/V（b）、Dy/Yb-SiO₂（c）、Zr/Sm-SiO₂（d）图解

文献数据来源 Meng et al.（2014）和Liu et al.（2019）

Fig. 8. Th/Nd-Th (a), 1/V-Rb/V(b), Dy/Yb-SiO₂ (c), and Zr/Sm-SiO₂ (d) diagrams for the Menba granodiorites

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图 9 拉萨地块南部晚白垩世岩浆作用的深部动力学机制示意图

Fig. 9. Schematic diagram of deep dynamic mechanism of Late Cretaceous magmatism in the southern Lhasa block

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表 1 拉萨地块南部晚白垩世岩浆岩年龄统计表

Table 1. Age compilation of Late Cretaceous magmatic rocks in southern Lhasa block

样品编号	岩性	位置	定年方法	年龄(Ma)	误差	参考文献
7-1	紫苏花岗岩	里龙	锆石LA-ICP-MS U-Pb	89.5	/	Zhang et al. (2010)
8-1	紫苏花岗岩	里龙	锆石LA-ICP-MS U-Pb	86.6	/	Zhang et al. (2010)
8-2	紫苏花岗岩	里龙	锆石LA-ICP-MS U-Pb	87.8	/	Zhang et al. (2010)
8-4	紫苏花岗岩	里龙	锆石LA-ICP-MS U-Pb	86.0	/	Zhang et al. (2010)
43-1	紫苏花岗岩	里龙	锆石LA-ICP-MS U-Pb	87.1	/	Zhang et al. (2010)
43-8	紫苏花岗岩	里龙	锆石LA-ICP-MS U-Pb	88.3	/	Zhang et al. (2010)
T024	花岗闪长岩	里龙-朗县	锆石SHRIMP U-Pb	80.4	1.1	Wen et al. (2008)
T027	花岗闪长岩	里龙-朗县	锆石SHRIMP U-Pb	82.7	1.6	Wen et al. (2008)
T368	花岗闪长岩	尼木	锆石LA-ICP-MS U-Pb	87.7	1.4	Xu et al. (2015)
T372	闪长岩	尼木	锆石LA-ICP-MS U-Pb	88.4	1.1	Xu et al. (2015)
T321	辉长闪长岩	尼木	锆石LA-ICP-MS U-Pb	90.8	1.0	Xu et al. (2015)
T433	辉长岩	日喀则	锆石LA-ICP-MS U-Pb	94.0	0.5	Xu et al. (2015)
09TB21-2	紫苏花岗岩	米林	锆石LA-ICP-MS U-Pb	91.6	1.0	Ma et al. (2013a)
09TB42-1	紫苏花岗岩	米林	锆石LA-ICP-MS U-Pb	93.6	1.2	Ma et al. (2013a)
09TB47-1	紫苏花岗岩	米林	锆石LA-ICP-MS U-Pb	88.7	1.5	Ma et al. (2013a)
09TB46-2	紫苏花岗岩	米林	锆石LA-ICP-MS U-Pb	92.0	1.1	Ma et al. (2013a)
09TB51-2	紫苏花岗岩	米林	锆石LA-ICP-MS U-Pb	91.2	1.4	Ma et al. (2013a)
09TB36	紫苏花岗岩	米林	锆石LA-ICP-MS U-Pb	99.5	1.1	Ma et al. (2013a)
09TB45-1	紫苏花岗岩	米林	锆石LA-ICP-MS U-Pb	94.7	1.0	Ma et al. (2013a)
07TB33a-1	石英二长岩	克鲁	锆石LA-ICP-MS U-Pb	91.3	1.6	Jiang et al. (2012)
07TB33b-2	石英二长岩	克鲁	锆石LA-ICP-MS U-Pb	93.3	2.0	Jiang et al. (2012)
07TB33d	闪长岩	克鲁	锆石LA-ICP-MS U-Pb	90.3	2.1	Jiang et al. (2012)
BB–45	镁铁质包体	朗县	锆石LA-ICP-MS U-Pb	106.4	2.6	Zheng et al. (2014)
BB–112	花岗闪长岩	朗县	锆石LA-ICP-MS U-Pb	103.1	1.8	Zheng et al. (2014)
BB–112	煌斑岩	朗县	锆石LA-ICP-MS U-Pb	96.8	0.7	Zheng et al. (2014)
BB–55	二云母花岗岩	努日	锆石LA-ICP-MS U-Pb	78.1	0.9	Zheng et al. (2014)
BB–113	二云母花岗岩	努日	锆石LA-ICP-MS U-Pb	76.3	1.9	Zheng et al. (2014)
BB–114	二云母花岗岩	努日	锆石LA-ICP-MS U-Pb	79.7	1.8	Zheng et al. (2014)
BB–116	二云母花岗岩	努日	锆石LA-ICP-MS U-Pb	76.1	2.1	Zheng et al. (2014)
NR–14	石英闪长岩	努日	锆石LA-ICP-MS U-Pb	95.9	0.9	Zheng et al. (2014)
T10-95-4	变辉长岩	里龙	锆石LA-ICP-MS U-Pb	93.2	0.8	Zhang et al. (2014)
T10-95-1	变辉长岩	里龙	锆石LA-ICP-MS U-Pb	90.9	0.9	Zhang et al. (2014)
T10-94-4	变辉长岩	里龙	锆石LA-ICP-MS U-Pb	82.2	0.8	Zhang et al. (2014)
T10-94-10	变辉长岩	里龙	锆石LA-ICP-MS U-Pb	77.3	2.5	Zhang et al. (2014)
T10-94-2	变辉长岩	里龙	锆石LA-ICP-MS U-Pb	74.5	4.7	Zhang et al. (2014)
09TB21-1	苏长岩	米林	锆石LA-ICP-MS U-Pb	92.8	1.1	Ma et al. (2013b)
09TB30-1	苏长岩	米林	锆石LA-ICP-MS U-Pb	91.8	2.1	Ma et al. (2013b)
09TB44-5	苏长岩	米林	锆石LA-ICP-MS U-Pb	93.6	1.2	Ma et al. (2013b)
SY04	英安岩	桑日	锆石SIMS U-Pb	95.0	1.0	Zhang et al. (2019)
SR02	英安岩	桑日	锆石LA-ICP-MS U-Pb	95.0	1.0	Zhang et al. (2019)
SK1303	花岗岩	措杰林	锆石LA-ICP-MS U-Pb	95.0	0.5	Wang et al. (2021)
SK1308	花岗岩	措杰林	锆石LA-ICP-MS U-Pb	96.2	0.6	Wang et al. (2021)
SK1310	花岗岩	措杰林	锆石LA-ICP-MS U-Pb	98.7	1.0	Wang et al. (2021)
SK1314	石英正长岩	措杰林	锆石LA-ICP-MS U-Pb	92.1	1.1	Wang et al. (2021)
09TB160-1	辉绿岩	达孜	锆石LA-ICP-MS U-Pb	92.3	2.4	Ma et al. (2015)
S16T89	花岗闪长岩	门巴	锆石LA-ICP-MS U-Pb	87.9	0.5	Liu et al. (2019)
S16T90	花岗闪长岩	门巴	锆石LA-ICP-MS U-Pb	88.5	0.5	Liu et al. (2019)
MB14-4	花岗闪长岩	门巴	锆石LA-ICP-MS U-Pb	83.7	0.5	Meng et al. (2014)
MB14-2	闪长质包体	门巴	锆石LA-ICP-MS U-Pb	85.2	0.4	Meng et al. (2014)
SD05	花岗闪长岩	门巴	锆石LA-ICP-MS U-Pb	83.2	0.9	本文研究

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表 2 门巴花岗闪长岩锆石LA-ICP-MS U-Pb同位素分析结果

Table 2. LA-ICP-MS zircon U-Pb analysis data for the Menba granodiorites

测试点	含量(10^-6)			Th/U	同位素比值						年龄(Ma)
测试点	Pb	Th	U	Th/U	²⁰⁷Pb/²⁰⁶Pb	±1σ	²⁰⁷Pb/²³⁵U	±1σ	²⁰⁶Pb/²³⁸U	±1σ	²⁰⁷Pb/²³⁵U	±1σ	²⁰⁶Pb/²³⁸U	±1σ
样品：SD05（花岗闪长岩）
SD05-1	597	2 804	1 518	1.85	0.049 7	0.001 9	0.085 3	0.002 6	0.012 5	0.000 3	83.1	2.4	80.3	1.7
SD05-2	881	3 965	1 801	2.20	0.049 5	0.001 6	0.089 4	0.002 7	0.013 3	0.000 4	87.0	2.5	84.9	2.4
SD05-3	410	1 891	1 162	1.63	0.047 9	0.001 2	0.085 1	0.002 6	0.012 8	0.000 3	83.0	2.4	82.3	1.6
SD05-4	715	3 302	1 582	2.09	0.049 4	0.001 2	0.088 7	0.002 4	0.013 0	0.000 3	86.3	2.3	83.6	1.8
SD05-5	486	2 208	1 420	1.56	0.047 6	0.002 2	0.087 9	0.002 8	0.013 4	0.000 3	85.5	2.6	86.1	1.9
SD05-7	721	3 420	1 680	2.04	0.049 2	0.001 4	0.086 9	0.003 0	0.012 8	0.000 4	84.6	2.8	81.8	2.2
SD05-8	559	2 629	1 695	1.55	0.048 8	0.001 0	0.090 6	0.003 2	0.013 4	0.000 4	88.1	2.9	85.8	2.3
SD05-9	746	3 517	1 527	2.30	0.047 4	0.001 6	0.087 0	0.002 8	0.013 2	0.000 3	84.7	2.6	84.8	2.0
SD05-10	487	2 178	1 563	1.39	0.048 2	0.001 0	0.088 2	0.002 4	0.013 2	0.000 3	85.8	2.3	84.7	1.9
SD05-12	538	2 524	1 389	1.82	0.048 6	0.001 0	0.088 1	0.002 4	0.013 1	0.000 3	85.8	2.2	84.1	1.9
SD05-13	531	2 377	1 388	1.71	0.048 5	0.001 0	0.087 0	0.002 7	0.013 0	0.000 4	84.7	2.5	83.2	2.3
SD05-15	584	2 777	1 448	1.92	0.048 6	0.001 1	0.084 1	0.002 6	0.012 5	0.000 3	82.0	2.4	80.3	1.9
SD05-16	622	2 714	1 425	1.90	0.048 9	0.003 3	0.088 7	0.005 8	0.013 1	0.000 4	86.2	5.4	84.1	2.7
SD05-17	700	3 146	1 581	1.99	0.049 3	0.001 9	0.086 5	0.002 8	0.012 7	0.000 3	84.3	2.6	81.2	2.0
SD05-18	902	4 176	1 904	2.19	0.049 4	0.001 1	0.086 0	0.003 0	0.012 6	0.000 3	83.8	2.8	80.7	2.1
SD05-19	696	3 206	1 564	2.05	0.048 8	0.002 4	0.089 5	0.004 1	0.013 2	0.000 4	87.0	3.8	84.7	2.3
SD05-20	522	2 341	1 387	1.69	0.049 7	0.001 4	0.092 5	0.003 1	0.013 5	0.000 3	89.9	2.9	86.6	2.0
SD05-21	402	1 873	1 236	1.52	0.046 7	0.001 3	0.083 4	0.002 6	0.013 1	0.000 4	81.3	2.4	83.9	2.4
SD05-22	636	2 897	1 541	1.88	0.049 3	0.002 3	0.087 1	0.003 2	0.013 0	0.000 3	84.8	3.0	83.0	2.2
SD05-23	506	2 248	1 265	1.78	0.048 2	0.001 9	0.083 9	0.003 0	0.012 6	0.000 3	81.8	2.8	80.9	2.1
SD05-24	673	3 044	1 529	1.99	0.048 5	0.001 9	0.086 8	0.003 0	0.012 9	0.000 3	84.5	2.8	82.8	2.0

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表 3 门巴花岗闪长岩主量元素（%）和微量元素（×10^-6）分析结果

Table 3. Major (%) and trace (×10^-6) element concentrations of the Menba granodiorites

样品号	SD05-1	SD05-2	SD05-3	SD05-4	SD05-5	SD05-6	SD05-7	SD05-8
SiO₂	65.83	61.71	65.86	66.46	66.04	67.02	65.76	66.03
TiO₂	0.58	0.96	0.63	0.51	0.49	0.40	0.57	0.54
Al₂O₃	15.46	15.05	14.90	15.00	15.69	15.77	15.34	15.30
TFe₂O₃	4.52	6.14	4.21	4.12	3.49	3.24	4.32	4.25
MnO	0.08	0.11	0.08	0.07	0.06	0.06	0.08	0.07
MgO	1.68	2.87	1.88	1.53	1.51	1.24	1.75	1.65
CaO	3.33	3.88	3.12	2.97	3.12	2.83	3.49	2.72
Na₂O	3.76	3.18	3.56	3.66	3.87	3.57	3.76	3.89
K₂O	3.64	4.29	4.07	4.10	4.00	5.13	3.54	3.81
P₂O₅	0.25	0.37	0.29	0.23	0.22	0.19	0.26	0.26
LOI	0.50	1.04	0.88	0.84	0.94	0.35	0.52	0.98
Total	99.62	99.60	99.48	99.49	99.43	99.79	99.41	99.50
Mg^#	43	48	47	43	46	43	45	44
A/CNK	0.95	0.89	0.93	0.94	0.96	0.95	0.94	0.99
Be	2.14	2.04	2.03	1.90	2.15	1.90	2.30	2.17
Sc	6.76	10.77	7.68	5.98	5.52	5.00	7.08	6.48
V	65.03	106.12	71.13	59.92	54.97	47.02	64.82	60.61
Cr	34.99	47.94	31.34	29.90	23.35	20.87	33.13	28.28
Co	8.71	14.27	9.43	8.03	7.15	6.61	8.99	8.74
Ni	13.03	19.92	13.41	10.85	9.78	9.17	12.56	12.41
Cu	6.26	4.15	4.60	5.94	3.78	4.66	4.72	4.48
Zn	50.51	82.46	58.72	52.88	44.29	41.93	52.28	52.08
Ga	21.31	24.46	20.76	19.63	20.03	18.84	20.98	20.61
Rb	128.11	161.73	154.58	129.64	129.42	160.39	125.57	147.65
Sr	789.14	766.95	819.83	734.77	798.26	849.91	788.66	715.89
Y	12.32	18.47	13.01	10.10	9.98	8.82	11.08	10.63
Zr	171.98	264.87	174.80	153.77	139.44	130.51	159.32	148.94
Nb	13.30	21.33	14.18	11.26	11.13	9.68	12.35	11.93
Cs	2.42	2.38	2.92	2.27	2.54	3.30	2.41	2.49
Ba	827.23	965.60	922.65	969.42	999.14	1520.99	585.44	638.95
La	63.05	66.74	50.21	39.62	40.41	34.66	44.29	49.12
Ce	105.17	129.47	93.71	73.80	74.26	63.93	81.24	83.92
Pr	10.66	14.22	10.21	7.89	7.93	6.86	8.66	8.60
Nd	36.66	51.06	36.39	28.19	28.21	23.94	30.60	30.30
Sm	5.46	7.79	5.57	4.33	4.36	3.83	4.71	4.54
Eu	1.29	1.75	1.31	1.09	1.10	1.03	1.16	1.13
Gd	3.74	5.50	3.90	3.00	2.96	2.65	3.32	3.18
Tb	0.51	0.73	0.52	0.40	0.40	0.35	0.44	0.43
Dy	2.49	3.64	2.56	1.99	2.02	1.77	2.19	2.09
Ho	0.45	0.66	0.46	0.36	0.36	0.32	0.40	0.38
Er	1.25	1.84	1.31	1.02	1.02	0.91	1.12	1.07
Tm	0.17	0.25	0.18	0.14	0.14	0.12	0.15	0.14
Yb	1.14	1.68	1.19	0.96	0.93	0.81	1.04	0.99
Lu	0.16	0.24	0.17	0.14	0.13	0.12	0.15	0.14
Hf	4.44	6.61	4.46	3.93	3.58	3.34	4.05	3.87
Ta	0.97	1.46	1.00	0.80	0.79	0.69	0.85	0.84
Pb	20.61	21.11	22.31	35.42	22.69	27.14	20.68	37.13
Th	31.27	33.23	26.84	27.47	23.86	16.76	17.54	24.55
U	3.68	4.69	2.91	4.10	4.13	2.69	2.84	3.56
Sr/Y	64.06	41.53	63.02	72.77	80.02	96.37	71.16	67.35

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表 4 门巴花岗闪长岩斜长石电子探针数据（%）

Table 4. Electron microprobe data (%) of plagioclases from the Menba granodiorites

测试点	K₂O	CaO	TiO₂	Na₂O	MgO	Al₂O₃	SiO₂	Cr₂O₃	MnO	FeO	P₂O₅	Total	An	Ab	Or
SD05a-1	0.28	4.29	0.00	9.38	0.00	23.54	62.82	0.00	0.00	0.11	0.00	100.43	19.9	78.6	1.6
SD05a-2	0.36	6.32	0.00	7.97	0.00	25.47	59.13	0.00	0.00	0.17	0.04	99.46	29.9	68.1	2.0
SD05a-3	0.50	5.83	0.02	8.23	0.00	24.82	60.18	0.01	0.00	0.21	0.00	99.80	27.4	69.9	2.8
SD05a-4	0.47	6.88	0.02	7.49	0.00	25.81	58.65	0.02	0.00	0.22	0.00	99.56	32.8	64.6	2.7
SD05a-5	0.57	5.79	0.00	8.19	0.03	25.00	60.02	0.02	0.02	0.19	0.00	99.82	27.2	69.6	3.2
SD05a-6	0.59	5.97	0.00	7.93	0.00	25.05	60.24	0.00	0.00	0.21	0.00	100.01	28.4	68.3	3.4
SD05a-7	0.65	5.64	0.02	8.17	0.01	24.82	60.39	0.00	0.00	0.21	0.00	99.91	26.6	69.8	3.6
SD05a-8	0.65	6.21	0.02	7.84	0.01	25.07	59.56	0.00	0.01	0.19	0.00	99.58	29.3	67.0	3.7
SD05a-9	0.56	6.17	0.00	7.88	0.01	25.29	59.20	0.00	0.00	0.21	0.00	99.33	29.3	67.6	3.2
SD05a-10	0.49	6.18	0.00	7.87	0.00	25.46	59.56	0.00	0.00	0.23	0.01	99.79	29.4	67.8	2.8
SD05a-11	0.55	5.88	0.03	8.15	0.00	24.83	60.03	0.01	0.01	0.20	0.00	99.68	27.6	69.3	3.1
SD05a-12	0.61	5.80	0.02	8.18	0.00	24.81	59.96	0.00	0.03	0.22	0.01	99.63	27.2	69.4	3.4
SD05b-1	0.38	3.42	0.00	9.56	0.00	23.07	64.70	0.00	0.00	0.15	0.01	101.28	16.2	81.7	2.1
SD05b-2	0.33	3.61	0.05	9.56	0.00	23.43	64.21	0.00	0.00	0.09	0.00	101.29	17.0	81.2	1.8
SD05b-3	0.48	7.24	0.03	7.21	0.02	26.15	57.71	0.01	0.01	0.16	0.01	99.03	34.7	62.6	2.8
SD05b-4	0.60	6.45	0.02	7.62	0.01	25.39	59.32	0.01	0.01	0.23	0.00	99.67	30.8	65.8	3.4
SD05b-5	0.51	5.87	0.03	8.00	0.02	25.13	60.51	0.01	0.00	0.18	0.00	100.26	28.0	69.1	2.9
SD05b-6	0.39	5.89	0.00	8.06	0.00	25.07	60.91	0.00	0.00	0.16	0.00	100.48	28.1	69.7	2.2
SD05b-7	0.34	6.40	0.00	7.94	0.01	25.49	60.08	0.02	0.01	0.17	0.01	100.46	30.2	67.9	1.9
SD05b-8	0.46	6.17	0.00	7.98	0.00	25.17	60.23	0.00	0.00	0.20	0.00	100.22	29.1	68.3	2.6
SD05b-9	0.46	5.79	0.00	8.22	0.00	25.33	61.22	0.01	0.00	0.20	0.00	101.25	27.3	70.1	2.6
SD05b-10	0.40	6.18	0.01	7.93	0.01	25.22	59.57	0.00	0.00	0.21	0.00	99.51	29.4	68.3	2.2
SD05b-11	0.34	6.16	0.00	8.13	0.00	25.24	60.15	0.00	0.01	0.20	0.00	100.23	29.0	69.1	1.9
SD05b-12	0.29	6.01	0.05	8.08	0.00	25.57	61.10	0.01	0.01	0.24	0.00	101.37	28.7	69.7	1.7
SD05b-13	0.33	6.08	0.01	8.00	0.01	25.41	59.85	0.00	0.00	0.16	0.00	99.84	29.0	69.1	1.9
SD05b-14	0.38	5.87	0.00	8.26	0.00	24.94	60.00	0.01	0.00	0.22	0.01	99.69	27.6	70.3	2.1
SD05b-15	0.35	5.06	0.00	8.91	0.01	24.21	61.99	0.00	0.01	0.18	0.00	100.71	23.4	74.6	1.9
SD05c-1	0.41	3.71	0.00	9.47	0.00	23.55	64.37	0.00	0.00	0.16	0.00	101.66	17.4	80.4	2.3
SD05c-2	0.42	5.85	0.01	8.09	0.00	25.01	60.31	0.02	0.00	0.20	0.00	99.91	27.9	69.8	2.4
SD05c-3	0.32	6.43	0.01	7.62	0.01	25.43	58.46	0.00	0.01	0.17	0.02	98.48	31.2	66.9	1.8
SD05c-4	0.61	5.55	0.03	8.07	0.01	24.65	60.22	0.00	0.00	0.22	0.00	99.35	26.6	70.0	3.5
SD05c-5	0.62	5.84	0.01	7.96	0.00	24.83	59.99	0.00	0.01	0.21	0.00	99.47	27.9	68.6	3.5
SD05c-6	0.64	5.99	0.00	7.91	0.01	25.04	59.54	0.00	0.00	0.21	0.01	99.34	28.4	68.0	3.6
SD05c-7	0.63	6.07	0.00	7.94	0.01	25.00	60.42	0.00	0.00	0.19	0.02	100.27	28.7	67.8	3.5
SD05c-8	0.37	6.01	0.00	7.94	0.02	24.96	59.92	0.00	0.00	0.22	0.01	99.45	28.9	69.0	2.1
SD05c-9	0.32	6.46	0.02	7.86	0.01	25.39	58.86	0.00	0.00	0.26	0.01	99.18	30.7	67.5	1.8
SD05c-10	0.44	5.88	0.00	8.11	0.00	24.75	59.80	0.00	0.00	0.23	0.00	99.21	27.9	69.6	2.5
SD05c-11	0.35	5.57	0.03	8.26	0.00	24.72	60.53	0.00	0.00	0.19	0.01	99.66	26.6	71.4	2.0
SD05c-12	0.32	5.73	0.04	8.42	0.02	24.78	61.38	0.00	0.01	0.17	0.00	100.86	26.8	71.4	1.8
SD05c-13	0.35	5.28	0.00	8.16	0.00	25.03	61.84	0.00	0.00	0.11	0.00	100.78	25.8	72.2	2.0
SD05c-14	0.56	5.47	0.00	8.46	0.00	24.61	60.70	0.01	0.02	0.19	0.01	100.00	25.5	71.4	3.1
SD05c-15	0.38	5.24	0.00	8.29	0.02	24.51	61.55	0.01	0.00	0.20	0.00	100.20	25.3	72.5	2.2

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西藏中拉萨地块门巴花岗闪长岩成因及深部动力学过程

doi: 10.3799/dqkx.2022.167

作者简介:
王旭辉（1993-），男，博士，矿物学、岩石学、矿床学专业，主要从事青藏高原岩浆-成矿作用研究. ORCID：0000-0002-3216-3299. E-mail：wangxuhui618@126.com

通讯作者:
郎兴海，ORCID：0000-0002-3309-3667. E-mail: langxinghai@126.com

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Petrogenesis and Geodynamic Processes of the Mamba Granodiorite, Central Lhasa Block, Xizang

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留言板

西藏中拉萨地块门巴花岗闪长岩成因及深部动力学过程

doi: 10.3799/dqkx.2022.167

作者简介: 王旭辉（1993-），男，博士，矿物学、岩石学、矿床学专业，主要从事青藏高原岩浆-成矿作用研究. ORCID：0000-0002-3216-3299. E-mail：wangxuhui618@126.com

通讯作者: 郎兴海，ORCID：0000-0002-3309-3667. E-mail: langxinghai@126.com

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出版历程

Petrogenesis and Geodynamic Processes of the Mamba Granodiorite, Central Lhasa Block, Xizang

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出版历程

目录

作者简介:
王旭辉（1993-），男，博士，矿物学、岩石学、矿床学专业，主要从事青藏高原岩浆-成矿作用研究. ORCID：0000-0002-3216-3299. E-mail：wangxuhui618@126.com

通讯作者:
郎兴海，ORCID：0000-0002-3309-3667. E-mail: langxinghai@126.com