造山带洋陆转换过程与岩浆作用：以东昆仑都兰地区古生代花岗岩为例

熊万宇康; 赵梦琪; 于淼; 刘潇扬; 龚磊; 曾庆鸿

doi:10.12401/j.nwg.2023186

造山带洋陆转换过程与岩浆作用：以东昆仑都兰地区古生代花岗岩为例

1.
中南大学地球科学与信息物理学院，湖南长沙　410083

2.
青海省地质调查局，青海西宁　810008

基金项目: 国家自然科学基金项目（41802080、42030809、41873043、41302056、41702073），中南大学创新驱动计划项目（2019CX035）和中国地质调查局项目（DD20221684、1212011085528）联合资助。

详细信息

作者简介: 熊万宇康（2001−），男，硕士研究生，矿产普查与勘探专业。E−mail：1203209947@qq.com

通讯作者: 于淼（1987−），男，副教授，博士，从事东昆仑岩浆岩和成矿规律研究。E−mail：yumiao1987@csu.edu.cn

中图分类号: P581

收稿日期: 2023-08-05

修回日期: 2023-10-01

录用日期: 2023-10-11

刊出日期: 2023-12-20

Ocean−Continent Transition Process and Magmatism in Orogenic Belts: A Case Study of Paleozoic Granites in the Dulan Area of East Kunlun

1.
School of Geosciences and Info−Physics, Central South University, Changsha 410083, Hunan, China

2.
Qinghai Geological Survey, Xining 810008, Qinghai, China

More Information

Corresponding author: YU Miao, yumiao1987@csu.edu.cn

Received Date: 05 August 2023

Revised Date: 01 October 2023

Accepted Date: 11 October 2023

Publish Date: 20 December 2023

摘要

摘要:
洋陆转换过程中俯冲−碰撞（增生）−后碰撞各阶段具有不同岩浆作用，其中板片俯冲和岩石圈拆沉−减薄机制尤其受到关注。东昆仑造山带位于青藏高原北部，是秦祁昆中央造山带的重要组成部分，在早古生代经历了原特提斯洋陆转化过程。笔者通过对东昆仑东段都兰地区古生代花岗岩进行年代学、全岩地球化学和Sr−Nd−Hf同位素研究，认为浪木日中志留世（429±4 Ma）花岗岩形成于洋壳俯冲阶段，具有埃达克质岛弧岩浆属性，与热俯冲机制下的洋壳部分熔融有关；希望沟与哈日扎早泥盆世（416～403 Ma）花岗岩形成于后碰撞阶段，分别显示I型和A型花岗岩特征，与新生下地壳的部分熔融和岩石圈减薄作用有关。综合区域古生代花岗岩地球化学资料表明，东昆仑东西段岩浆岩差异可能是洋脊俯冲所致。
- 地球化学 /
- 洋脊俯冲 /
- 埃达克岩 /
- 锆石U−Pb年代学 /
- Sr−Nd−Hf同位素 /
- 东昆仑
Abstract:
The subduction−collision (accretion)−post−collision stages in the ocean−continent transition process have different magmatisms, among which the slab subduction and lithosphere delamination−thinning mechanisms have received special attention. The East Kunlun orogenic belt is located in the northern part of the Qinghai−Tibet Plateau, and is an important part of the Qin−Qi−Kun central orogenic belt, which has experienced the transformation process of the Proto−Tethys Ocean and Continent in the Early Paleozoic. Based on the geochronology, whole−rock geochemistry and Sr−Nd−Hf isotope studies of the Paleozoic granites in the Dulan area, eastern Kunlun, this paper suggests that the Langmuri Middle Silurian (429±4 Ma) granites were formed in the subduction stage of the oceanic crust. It has the property of adakitic island arc magma, which is related to the partial melting of oceanic crust under the mechanism of thermal subduction. The Xiwanggou and Harizha Early Devonian (416 ~ 403 Ma) granites were formed in the post−collision stage, showing the characteristics of I−type and A−type granites, respectively, which are related to the partial melting of the young lower crust and thinning of the lithosphere. The comprehensive regional Paleozoic granite geochemical data indicate that the difference of magmatic rocks in the east and west of East Kunlun may be caused by ocean ridge subduction.
- geochemistry /
- ridge subduction /
- adakite /
- zircon U−Pb chronology /
- Sr−Nd−Hf isotope /
- East Kunlun

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图 1 东昆仑造山带地质图（a）和构造地块划分图（b）（据Yu et al.，2020）

Figure 1.

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图 2 研究区地质图及采样位置（据Chen et al.，2020a修改）

Figure 2.

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图 3 都兰地区典型花岗岩样品显微照片

Figure 3.

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图 4 都兰地区花岗岩样品典型锆石CL图像

Figure 4.

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图 5 都兰地区花岗岩锆石 U–Pb 谐和图和加权平均年龄图

Figure 5.

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图 6 浪木日、哈日扎与希望沟花岗岩主量元素图解

Figure 6.

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图 7 球粒陨石标准化稀土元素分配图（a、c、e）和原始地幔标准化微量元素蛛网图（b、d、f）（标准化值据Sun et al.，1989）

Figure 7.

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图 8 东昆仑花岗岩成因分类（a、b）及埃达克岩图解（c）

Figure 8.

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图 9 东昆仑东段花岗岩Nb/Ta–Nd/Th图解（a）（据Barth et al.，2000）和构造环境图解（b）（据Pearce，1996）

Figure 9.

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图 10 LMR-9和XW-12锆石T_DM^C（Ma）和εHf（t）频数直方图（据吴福元等，2007a）

Figure 10.

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图 11 浪木日、希望沟花岗岩锆石Hf–Sr–Nd同位素特征图（底图d据Zhang et al.，2021）

Figure 11.

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图 12 俯冲带变质环境及榴辉岩P–T轨迹（据国显正等，2017；张泽明等，2021修改）

Figure 12.

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图 13 东昆仑造山带原特提斯洋脊俯冲模型图（据Windley et al.，2018修改）

Figure 13.

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表 1 都兰地区样品岩相学特征描述

Table 1. Petrographic characteristics of samples from the Dulan area

样品地点	样品号	采样位置	岩性特征	矿物组成	样品特征
浪木日	LMR-9	N 35°46'21'' E 98°38'47''	黑云母花岗闪长岩	长石（60%）石英（20%）黑云母（15%）白云母（5%）	斜长石晶体粒径为1 ～ 4.5 mm，可见明显绢云母化；石英晶体呈粒状，无色，正低突起，粒径为1 ～ 2.5 mm；黑云母呈褐色，多色性明显，同时可见少量片状白云母，发育一组极完全解理，粒径为0.25 ～ 1 mm （图3a、图3b）
哈日扎	HRZ-1	N 35°54′26″ E 98°36′28″	似斑状二长花岗岩	斜长石（40%）碱性长石（30%）石英（20%）黑云母（10%）	斜长石粒径为1.5 ～ 4 mm，蚀变程度低；石英呈粒状，粒径为 1.5 ～ 4 mm，呈乳白色，包裹体较多，表面较浑浊；黑云母呈深褐色，片状，粒径为 0.5 ～ 1 mm，多色性明显；碱性长石为钾长石，晶体形态呈粒状，部分泥化，粒径为0.5 ～ 1 mm （图3c、图3d）
哈日扎	HRZ-3	N 35°54′26″ E 98°36′28″	花岗闪长岩	斜长石（60%）碱性长石（15%）石英（15%）黑云母（10%）	斜长石晶体粒径为1 ～ 4 mm；石英晶体呈粒状，无色，正低突起，粒径为 0.5 ～ 4 mm；碱性长石为钾长石，呈粒状，部分泥化，粒径为 1 ～ 2 mm；黑云母呈深褐色，多色性明显；镜下可见角闪石，褐色，蚀变不明显（图3e、图3f）
希望沟	XW-12	N 35°52'51'' E 98°42'24''	花岗闪长岩	斜长石（70%）石英（20%）黑云母（10%）	斜长石晶体粒径为1 ～ 3 mm，绢云母化明显；石英晶体呈粒状，颜色为无色，粒径为1 ～ 4 mm，由于包裹体较多，表面浑浊；黑云母呈黑–棕色，具一组极完全解理，多色性明显（图3g、图3h）

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表 2 东昆仑都兰地区浪木日黑云母花岗闪长岩（LMR-9）锆石 LA–ICP–MS U–Pb 定年数据表

Table 2. Zircon LA–ICP–MS U–Pb dating data of biotite granodiorite (LMR-9) in Langmuri, Dulan area, East Kunlun

测点号	²³⁸U	²³²Th	Th/U	²⁰⁷Pb/²⁰⁶Pb		²⁰⁷Pb/²³⁵U		²⁰⁶Pb/²³⁸U		²⁰⁸Pb/²³²Th
测点号	10⁻⁶	10⁻⁶	Th/U	比值	1σ	比值	1σ	比值	1σ	比值	1σ
LMR-9-02	316.325	6.351	0.020 077	0.056 335	0.001 638	0.541 065	0.016 034	0.069 559	0.000 885	0.098 356	0.021 291
LMR-9-04	698.218	29.668	0.042 491	0.056 643	0.000 818	0.539 660	0.008 877	0.069 121	0.000 693	0.021 201	0.000 840
LMR-9-07	1281.839	110.004	0.085 817	0.057 725	0.001 061	0.526 948	0.011 890	0.066 208	0.000 916	0.033 476	0.001 380
LMR-9-08	671.123	9.016	0.013 434	0.055 888	0.001 016	0.532 169	0.012 949	0.068 916	0.001 040	0.028 004	0.002 348
LMR-9-09	1120.577	300.149	0.267 852	0.056 240	0.000 904	0.535 645	0.015 310	0.068 710	0.001 311	0.023 340	0.000 794
LMR-9-10	421.336	58.694	0.139 306	0.056 000	0.000 827	0.535 485	0.009 094	0.069 275	0.000 574	0.025 243	0.000 969
LMR-9-11	2289.009	42.755	0.018 679	0.056 511	0.000 848	0.541 654	0.009 595	0.069 193	0.000 639	0.029 508	0.001 831
LMR-9-17	1394.080	76.079	0.054 573	0.056 275	0.000 703	0.538 376	0.007 418	0.069 328	0.000 661	0.020 995	0.000 658
LMR-9-19	753.590	51.631	0.068 513	0.058 110	0.001 524	0.539 648	0.016 456	0.067 694	0.001 153	0.004 164	0.001 038
LMR-9-23	318.174	13.328	0.041 888	0.055 494	0.001 028	0.522 255	0.010 862	0.068 024	0.000 848	0.021 305	0.001 701

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测点号	²³⁸U/²³²Th		²⁰⁷Pb/²⁰⁶Pb		²⁰⁷Pb/²³⁵U		²⁰⁶Pb/²³⁸U		²⁰⁸Pb/²³²Th
测点号	年龄（Ma）	1σ	年龄（Ma）	1σ	年龄（Ma）	1σ	年龄（Ma）	1σ	年龄（Ma）	1σ
LMR-9-02	130.655 000	18.584 22	465.6	64.4	439.1	10.6	433.5	5.3	1896.2	391.8
LMR-9-04	23.236 260	0.463 315	477.7	31.9	438.2	5.9	430.9	4.2	424.0	16.6
LMR-9-07	12.144 750	0.578 212	519.3	40.3	429.8	7.9	413.3	5.5	665.5	27.0
LMR-9-08	80.145 330	4.656 936	447.9	40.4	433.2	8.6	429.6	6.3	558.2	46.2
LMR-9-09	3.582 419	0.084 373	461.9	35.6	435.5	10.1	428.4	7.9	466.3	15.7
LMR-9-10	9.336 152	0.477 850	452.4	32.8	435.4	6.0	431.8	3.5	503.9	19.1
LMR-9-11	52.205 370	1.212 468	472.5	33.2	439.5	6.3	431.3	3.9	587.8	35.9
LMR-9-17	18.235 300	0.440 723	463.2	27.7	437.4	4.9	432.1	4.0	420.0	13.0
LMR-9-19	15.621 370	0.719 202	533.9	57.4	438.2	10.9	422.2	7.0	84.0	20.9
LMR-9-23	24.343 330	0.497 610	432.2	41.3	426.7	7.2	424.2	5.1	426.1	33.7

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表 3 东昆仑都兰地区哈日扎似斑状二长花岗岩（HRZ-1）锆石 LA–ICP–MS U–Pb 定年数据表

Table 3. Zircon LA–ICP–MS U–Pb dating data of porphyritic monzogranite (HRZ-1) in Harizha, Dulan area, East Kunlun

测点号	²⁰⁷Pb/²⁰⁶Pb		²⁰⁷Pb/²³⁵U		²⁰⁶Pb/²³⁸U		²⁰⁸Pb/²³²Th		²⁰⁷Pb/²⁰⁶Pb		²⁰⁷Pb/²³⁵U		²⁰⁶Pb/²³⁸U		²⁰⁸Pb/²³²Th
测点号	比值	1σ	比值	1σ	比值	1σ	比值	1σ	年龄（Ma）	1σ	年龄（Ma）	1σ	年龄（Ma）	1σ	年龄(Ma)	1σ
HRZV-1-01	0.052 45	0.001 31	0.474 83	0.012 02	0.065 66	0.000 86	0.021 22	0.000 35	305.0	34.0	395.0	8.0	410.0	5.0	424.0	7.0
HRZV-1-02	0.056 03	0.000 98	0.501 06	0.009 23	0.064 86	0.000 81	0.020 84	0.000 28	454.0	20.0	412.0	6.0	405.0	5.0	417.0	6.0
HRZV-1-03	0.056 58	0.001 18	0.510 35	0.010 92	0.065 42	0.000 83	0.021 81	0.000 35	475.0	26.0	419.0	7.0	409.0	5.0	436.0	7.0
HRZV-1-04	0.054 85	0.001 64	0.485 13	0.014 5	0.064 15	0.000 88	0.020 55	0.000 42	406.0	42.0	402.0	10.0	401.0	5.0	411.0	8.0
HRZV-1-05	0.055 86	0.001 21	0.509 52	0.011 27	0.066 15	0.000 85	0.021 8	0.000 34	447.0	27.0	418.0	8.0	413.0	5.0	436.0	7.0
HRZV-1-06	0.057 84	0.001 29	0.536 81	0.012 19	0.067 31	0.000 87	0.022 88	0.000 35	524.0	28.0	436.0	8.0	420.0	5.0	457.0	7.0
HRZV-1-07	0.057 06	0.000 92	0.518 35	0.008 91	0.065 88	0.000 81	0.020 82	0.000 26	494.0	18.0	424.0	6.0	411.0	5.0	416.0	5.0
HRZV-1-08	0.056 54	0.001 81	0.517 8	0.016 51	0.066 42	0.000 93	0.020 27	0.000 43	474.0	46.0	424.0	11.0	415.0	6.0	406.0	9.0
HRZV-1-09	0.057 51	0.001 44	0.509 9	0.012 94	0.064 3	0.000 85	0.021 9	0.000 4	511.0	33.0	418.0	9.0	402.0	5.0	438.0	8.0
HRZV-1-11	0.056 85	0.001 99	0.497 31	0.017 29	0.063 44	0.000 92	0.020 74	0.000 49	486.0	51.0	410.0	12.0	397.0	6.0	415.0	10.0
HRZV-1-12	0.054 94	0.001 14	0.494 19	0.010 58	0.065 23	0.000 83	0.020 01	0.000 27	410.0	26.0	408.0	7.0	407.0	5.0	400.0	5.0
HRZV-1-13	0.055 8	0.001 09	0.522 47	0.010 54	0.067 91	0.000 85	0.016 99	0.000 25	444.0	24.0	427.0	7.0	424.0	5.0	341.0	5.0
HRZV-1-14	0.058 25	0.001 46	0.535 3	0.013 54	0.066 64	0.000 88	0.022 16	0.000 37	539.0	33.0	435.0	9.0	416.0	5.0	443.0	7.0
HRZV-1-15	0.054 76	0.001 17	0.504 01	0.011 07	0.066 75	0.000 85	0.021 91	0.000 31	402.0	27.0	414.0	7.0	417.0	5.0	438.0	6.0
HRZV-1-16	0.055 95	0.001 62	0.530 39	0.015 41	0.068 75	0.000 94	0.021 64	0.000 44	450.0	40.0	432.0	10.0	429.0	6.0	433.0	9.0
HRZV-1-17	0.054 87	0.001 41	0.506 57	0.013 13	0.066 96	0.000 88	0.019 86	0.000 35	407.0	35.0	416.0	9.0	418.0	5.0	397.0	7.0
HRZV-1-18	0.056 31	0.001 47	0.506 36	0.013 33	0.065 22	0.000 86	0.018 06	0.000 34	465.0	35.0	416.0	9.0	407.0	5.0	362.0	7.0
HRZV-1-19	0.053 84	0.001 51	0.494 25	0.013 91	0.066 58	0.000 89	0.020 86	0.000 34	364.0	40.0	408.0	9.0	416.0	5.0	417.0	7.0
HRZV-1-20	0.054 36	0.001 39	0.501 14	0.012 98	0.066 85	0.000 88	0.020 05	0.000 35	386.0	35.0	412.0	9.0	417.0	5.0	401.0	7.0
HRZV-1-22	0.059 65	0.001 83	0.545	0.016 75	0.066 26	0.000 92	0.019 87	0.000 4	591.0	43.0	442.0	11.0	414.0	6.0	398.0	8.0
HRZV-1-23	0.061 22	0.002 38	0.541 74	0.020 87	0.064 17	0.000 98	0.009 02	0.000 2	647.0	56.0	440.0	14.0	401.0	6.0	181.0	4.0
HRZV-1-24	0.056 1	0.001 23	0.513 25	0.011 52	0.066 35	0.000 85	0.019 58	0.000 28	456.0	28.0	421.0	8.0	414.0	5.0	392.0	6.0
HRZV-1-25	0.052 99	0.003 08	0.490 66	0.028 04	0.067 15	0.001 21	0.020 55	0.000 57	328.0	97.0	405.0	19.0	419.0	7.0	411.0	11.0

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表 4 东昆仑都兰地区哈日扎花岗闪长岩（HRZ-3）锆石 LA–ICP–MS U–Pb 定年数据表

Table 4. Zircon LA–ICP–MS U–Pb dating data of granodiorite (HRZ-3) in Harizha, Dulan, East Kunlun

测点号	²⁰⁷Pb/²⁰⁶Pb		²⁰⁷Pb/²³⁵U		²⁰⁶Pb/²³⁸U		²⁰⁸Pb/²³²Th		²⁰⁷Pb/²⁰⁶Pb		²⁰⁷Pb/²³⁵U		²⁰⁶Pb/²³⁸U		²⁰⁸Pb/²³²Th
测点号	比值	1σ	比值	1σ	比值	1σ	比值	1σ	年龄（Ma）	1σ	年龄（Ma）	1σ	年龄（Ma）	1σ	年龄（Ma）	1σ
HRZV-3-01	0.053 56	0.001 54	0.494 79	0.014 27	0.067 01	0.000 91	0.020 58	0.000 36	353.0	41.0	408.0	10.0	418.0	5.0	412.0	7.0
HRZV-3-02	0.053 23	0.003 18	0.500 27	0.029 34	0.068 18	0.001 26	0.021 21	0.000 81	339.0	99.0	412.0	20.0	425.0	8.0	424.0	16.0
HRZV-3-03	0.056 41	0.001 97	0.521 01	0.018 04	0.067	0.000 97	0.018 99	0.000 35	469.0	51.0	426.0	12.0	418.0	6.0	380.0	7.0
HRZV-3-04	0.056 14	0.001 37	0.523 22	0.012 9	0.067 62	0.000 88	0.021 78	0.000 31	458.0	32.0	427.0	9.0	422.0	5.0	435.0	6.0
HRZV-3-06	0.056 29	0.001 13	0.522	0.010 79	0.067 26	0.000 85	0.020 18	0.000 31	464.0	25.0	426.0	7.0	420.0	5.0	404.0	6.0
HRZV-3-07	0.058 65	0.002 23	0.541 27	0.020 36	0.066 95	0.001 01	0.021 36	0.000 54	554.0	56.0	439.0	13.0	418.0	6.0	427.0	11.0
HRZV-3-08	0.053 26	0.002 45	0.482 31	0.021 92	0.065 69	0.001 05	0.020 96	0.000 56	340.0	74.0	400.0	15.0	410.0	6.0	419.0	11.0
HRZV-3-09	0.055 9	0.001 56	0.512 41	0.014 35	0.066 49	0.000 9	0.019 15	0.000 37	448.0	38.0	420.0	10.0	415.0	5.0	383.0	7.0
HRZV-3-10	0.057 35	0.001 42	0.531 92	0.013 33	0.067 29	0.000 88	0.020 72	0.000 33	505.0	33.0	433.0	9.0	420.0	5.0	415.0	7.0
HRZV-3-11	0.052 32	0.001 7	0.477 74	0.015 52	0.066 24	0.000 93	0.020 87	0.000 48	299.0	48.0	397.0	11.0	413.0	6.0	417.0	10.0
HRZV-3-13	0.054 93	0.001 68	0.504 21	0.015 41	0.066 58	0.000 92	0.021 04	0.000 41	409.0	44.0	415.0	10.0	416.0	6.0	421.0	8.0
HRZV-3-15	0.058 02	0.001 67	0.530 33	0.015 34	0.066 3	0.000 91	0.021 9	0.000 4	531.0	39.0	432.0	10.0	414.0	6.0	438.0	8.0
HRZV-3-16	0.056 8	0.002 03	0.512 54	0.018 19	0.065 44	0.000 95	0.019 28	0.000 35	484.0	53.0	420.0	12.0	409.0	6.0	386.0	7.0
HRZV-3-17	0.053 71	0.001 29	0.488 4	0.011 9	0.065 95	0.000 86	0.020 98	0.000 36	359.0	32.0	404.0	8.0	412.0	5.0	420.0	7.0
HRZV-3-18	0.054 14	0.001 54	0.498 83	0.014 22	0.066 83	0.000 9	0.020 72	0.000 32	377.0	40.0	411.0	10.0	417.0	5.0	415.0	6.0
HRZV-3-19	0.053 95	0.001 89	0.495 93	0.017 26	0.066 66	0.000 96	0.021 5	0.000 43	369.0	52.0	409.0	12.0	416.0	6.0	430.0	9.0
HRZV-3-20	0.054 31	0.001 17	0.502 2	0.011 11	0.067 05	0.000 86	0.018 98	0.000 25	384.0	28.0	413.0	8.0	418.0	5.0	380.0	5.0
HRZV-3-21	0.055 99	0.002 27	0.513 65	0.020 61	0.066 52	0.001 02	0.020 83	0.000 47	452.0	62.0	421.0	14.0	415.0	6.0	417.0	9.0
HRZV-3-22	0.055 82	0.001 49	0.514 25	0.013 87	0.066 8	0.000 89	0.021 56	0.000 41	445.0	37.0	421.0	9.0	417.0	5.0	431.0	8.0
HRZV-3-23	0.054 97	0.001 13	0.504 89	0.010 68	0.066 61	0.000 85	0.020 14	0.000 31	411.0	26.0	415.0	7.0	416.0	5.0	403.0	6.0
HRZV-3-24	0.055 4	0.001 46	0.515 74	0.013 73	0.067 5	0.000 9	0.021 75	0.000 36	428.0	36.0	422.0	9.0	421.0	5.0	435.0	7.0

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表 5 东昆仑都兰地区希望沟花岗闪长岩（XW-12）锆石 LA–ICP–MS U–Pb 定年数据表

Table 5. LA–ICP–MS U–Pb dating data of the granodiorite (XW-12) zircon in Xiwanggou, Dulan area, East Kunlun

测点号	²³⁸U	²³²Th	Th/U	²⁰⁷Pb/²⁰⁶Pb		²⁰⁷Pb/²³⁵U		²⁰⁶Pb/²³⁸U		²⁰⁸Pb/²³²Th
测点号	10^–6	10^–6	Th/U	比值	1σ	比值	1σ	比值	1σ	比值	1σ
XW-12-03	222.038	77.943	0.351 037	0.053 771	0.002 176	0.476 970	0.019 547	0.064 376	0.001 493	0.020 698	0.000 928
XW-12-05	390.010	224.742	0.576 248	0.055 657	0.001 278	0.492 616	0.011 468	0.064 342	0.000 907	0.019 634	0.000 446
XW-12-06	308.777	3.886	0.012 587	0.054 606	0.001 612	0.486 234	0.013 135	0.064 725	0.000 695	0.024 073	0.003 252
XW-12-07	2705.775	36.420	0.013 460	0.057 055	0.002 729	0.512 476	0.025 946	0.064 37	0.001 040	0.066 743	0.003 946
XW-12-08	243.035	66.346	0.272 987	0.056 431	0.001 616	0.501 419	0.013 779	0.064 593	0.000 844	0.021 364	0.001 055
XW-12-09	200.146	87.528	0.437 321	0.054 623	0.002 524	0.488 593	0.022 397	0.064 57	0.001 177	0.021 824	0.000 926
XW-12-17	282.261	106.744	0.378 176	0.056 385	0.001 208	0.500 838	0.010 560	0.064 691	0.000 847	0.020 414	0.000 683
XW-12-19	245.495	104.976	0.427 609	0.053 623	0.002 023	0.484 635	0.016 876	0.065 515	0.001134	0.020 101	0.001 307
XW-12-20	435.646	51.163	0.117 441	0.057 011	0.001 658	0.503 790	0.015 055	0.064 099	0.000 953	0.036 289	0.002 546
XW-12-21	3968.980	47.722	0.012 024	0.055 292	0.000 751	0.493 886	0.007 562	0.064 609	0.000 736	0.020 955	0.000 869
XW-12-22	257.169	118.039	0.458 993	0.055 688	0.001 387	0.492 718	0.011 250	0.064 258	0.000 783	0.020 524	0.000 624
XW-12-23	202.007	91.347	0.452 196	0.054 323	0.001 255	0.488 256	0.012 107	0.065 118	0.000 866	0.020 815	0.000 599

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测点号	²³⁸U/²³²Th		²⁰⁷Pb/²⁰⁶Pb		²⁰⁷Pb/²³⁵U		²⁰⁶Pb/²³⁸U		²⁰⁸Pb/²³²Th
测点号	年龄（Ma）	1σ	年龄（Ma）	1σ	年龄（Ma）	1σ	年龄（Ma）	1σ	年龄（Ma）	1σ
XW-12-03	2.835 826	0.081 675	361.5	91.3	396.0	13.4	402.2	9.0	414.1	18.4
XW-12-05	1.812 681	0.043 438	438.7	51.1	406.7	7.8	402.0	5.5	393.0	8.8
XW-12-06	106.235 400	9.505 966	396.1	66.2	402.3	9.0	404.3	4.2	480.8	64.2
XW-12-07	75.778 780	2.710 546	493.7	105.4	420.1	17.4	402.1	6.3	1 305.9	74.8
XW-12-08	3.770 071	0.073 742	469.4	63.4	412.7	9.3	403.5	5.1	427.3	20.9
XW-12-09	2.325 497	0.074 162	396.8	103.6	404.0	15.3	403.4	7.1	436.4	18.3
XW-12-17	2.512 113	0.106 452	467.6	47.4	412.3	7.1	404.1	5.1	408.5	13.5
XW-12-19	2.258 608	0.074 207	355.3	85.2	401.2	11.5	409.1	6.9	402.2	25.9
XW-12-20	8.548 346	0.440 448	492.0	64.1	414.3	10.2	400.5	5.8	720.5	49.7
XW-12-21	81.329 490	2.320 900	424.1	30.3	407.6	5.1	403.6	4.5	419.2	17.2
XW-12-22	2.146 288	0.071 575	439.9	55.4	406.8	7.7	401.5	4.7	410.6	12.4
XW-12-23	2.296 398	0.080 975	384.4	51.9	403.7	8.3	406.7	5.2	416.4	11.9

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表 6 东昆仑都兰地区LMR-9、HRZ-1、HRZ-3和XW-12花岗岩主微量元素统计表

Table 6. Major and trace elements of LMR-9, HRZ-1, HRZ-3 and XW-12 granites in the Dulan area of East Kunlun

样品号	LMP-9-1	LMR-9-2	LMR-9-3	LMR-9-4	LMR-9-5	HRZ-1-1	HRZ-1-2	HRZ-1-3	HRZ-1-4	HRZ-1-5	HRZ-3-1	HRZ-3-2	HRZ-3-3	HRZ-3-4	HRZ-3-5	XW-12-1	XW-12-2	XW-12-3	XW-12-4	XW-12-5
SiO₂	71.73	71.57	71.21	71.50	71.48	68.50	70.48	69.96	69.64	69.07	69.01	69.54	71.08	69.27	70.17	72.18	72.75	71.34	72.47	72.05
Al₂O₃	15.87	15.41	15.39	15.56	15.61	15.76	14.72	14.44	14.97	15.36	15.02	14.88	14.44	14.95	14.69	14.65	15.20	14.42	14.93	14.81
TFe₂O₃	1.94	1.94	1.90	1.93	1.92	3.19	3.16	3.14	3.16	3.18	3.14	3.30	3.06	3.22	3.14	1.76	1.83	2.51	1.80	2.17
MgO	0.85	0.85	0.89	0.86	0.86	1.07	1.07	1.06	1.07	1.07	1.08	1.11	1.01	1.10	1.05	0.94	0.81	0.89	0.88	0.85
CaO	2.51	2.52	2.58	2.53	2.54	2.66	2.49	2.54	2.56	2.61	2.53	2.53	2.39	2.53	2.46	1.47	1.60	2.72	1.54	2.16
Na₂O	5.21	5.29	5.45	5.32	5.33	3.98	3.77	3.57	3.77	3.88	3.86	3.67	3.65	3.77	3.71	4.95	4.81	4.10	4.88	4.45
K₂O	1.69	1.63	1.40	1.57	1.56	3.19	3.10	3.15	3.15	3.17	3.29	3.20	2.99	3.25	3.12	1.76	1.92	2.78	1.84	2.35
TiO₂	0.21	0.21	0.21	0.21	0.21	0.42	0.40	0.40	0.41	0.41	0.39	0.43	0.42	0.41	0.41	0.16	0.16	0.15	0.16	0.16
P₂O₅	0.08	0.07	0.07	0.07	0.07	0.14	0.13	0.14	0.14	0.14	0.13	0.13	0.13	0.13	0.13	0.06	0.06	0.06	0.06	0.06
MnO	0.03	0.04	0.04	0.04	0.04	0.06	0.06	0.06	0.06	0.06	0.06	0.06	0.06	0.06	0.06	0.04	0.04	0.07	0.04	0.05
LOI	0.44	0.37	0.56	0.45	0.48	0.73	0.61	1.13	0.83	0.78	0.90	1.29	0.78	1.09	0.94	1.44	1.26	1.35	1.35	1.31
A/CNK	1.06	1.02	1.01	1.03	1.04	1.06	1.04	1.04	1.05	1.05	1.03	1.05	1.06	1.04	1.05	1.15	1.18	0.98	1.16	1.08
Na₂O+K₂O	6.90	6.92	6.85	6.89	6.88	7.16	6.88	6.72	6.92	7.04	7.15	6.87	6.65	7.01	6.83	6.71	6.73	6.88	6.72	6.80
Li	9.26	8.06	9.41	8.91	9.19	29.92	29.56	27.25	28.91	29.41	14.87	23.59	24.37	19.23	21.80	11.56	11.57	6.88	11.57	9.22
Be	1.94	1.69	1.62	1.75	1.77	3.61	3.44	3.02	3.36	3.48	3.56	3.26	3.38	3.41	3.40	2.35	2.28	2.36	2.32	2.32
Sc	3.81	3.54	3.69	3.68	3.72	8.09	7.64	6.92	7.55	7.82	8.68	7.79	6.90	8.24	7.57	3.86	4.24	3.07	4.05	3.66
Ti	1 108.422	1 229.558	1 273.744	1 203.908	1 195.358	3 066.467	2 986.563	2 943.558	2 998.863	3 032.665	3 018.183	3 148.628	3 096.428	3 083.405	3 089.916	936.65	1 147.271	979.35	1041.96	1063.31
V	14.95	15.73	17.13	15.94	16.01	49.32	48.53	46.95	48.27	48.80	49.85	48.88	47.29	49.36	48.32	11.34	12.90	15.70	12.12	14.30
Mn	299.72	279.84	275.23	284.93	286.63	587.28	600.79	564.37	584.15	585.71	561.75	584.52	561.32	573.13	567.23	304.24	384.02	635.96	344.13	509.99
Co	3.97	3.01	3.10	3.36	3.48	7.97	7.44	7.36	7.59	7.78	8.00	7.55	6.88	7.78	7.33	3.15	2.91	2.40	3.03	2.65
Ni	3.58	4.57	5.51	4.55	4.55	13.03	9.91	8.52	10.49	11.76	9.20	9.56	8.51	9.38	8.95	1.83	4.65	3.02	3.24	3.83
Cu	4.12	3.00	2.81	3.31	3.41	7.13	6.52	5.28	6.31	6.72	6.52	5.99	4.85	6.26	5.55	4.26	4.32	4.27	4.29	4.30
Zn	36.40	30.31	30.40	32.37	33.05	63.87	62.73	61.64	62.75	63.31	61.48	63.44	56.32	62.46	59.39	32.14	19.26	15.93	25.70	17.59
Ga	18.39	19.59	20.25	19.41	19.35	25.32	24.08	22.70	24.03	24.68	25.30	23.99	23.73	24.65	24.19	17.42	21.47	19.58	19.45	20.53
As	0.51	0.36	0.45	0.44	0.47	1.92	1.65	1.66	1.74	1.83	2.21	1.64	2.08	1.92	2.00	0.91	0.92	1.04	0.91	0.98
Rb	49.89	51.81	48.12	49.94	49.31	109.38	112.15	98.21	106.58	107.98	94.81	96.53	108.32	95.67	101.99	55.74	61.19	109.01	58.46	85.10
Sr	400.01	384.93	395.64	393.53	396.39	308.50	290.25	280.95	293.23	300.87	325.46	306.96	278.41	316.21	297.31	270.62	316.08	171.27	293.35	243.68
Y	6.16	6.37	5.94	6.16	6.09	24.23	22.36	20.63	22.41	23.32	22.31	23.26	26.13	22.78	24.46	11.71	15.16	15.39	13.44	15.28
Zr	88.92	85.44	91.68	88.68	89.76	225.93	227.59	206.98	220.17	223.05	195.79	192.46	204.06	194.13	199.09	132.14	108.16	79.44	120.15	93.80
Nb	3.05	2.69	2.75	2.83	2.88	14.29	13.55	12.80	13.55	13.92	13.61	15.18	15.84	14.40	15.12	4.65	4.47	3.48	4.56	3.97
Mo	1.36	0.09	0.32	0.59	0.76	0.49	0.54	0.47	0.50	0.49	0.61	1.22	0.58	0.91	0.75	0.55	0.23	0.11	0.39	0.17
Cd	0.02	0.03	0.03	0.03	0.03	0.27	0.24	0.23	0.25	0.26	0.18	0.27	0.21	0.22	0.22	0.03	0.04	0.08	0.04	0.06
In	0.03	0.01	0.01	0.01	0.02	0.06	0.06	0.06	0.06	0.06	0.06	0.06	0.05	0.06	0.06	0.03	0.01	0.04	0.02	0.02
Cs	2.15	2.63	2.11	2.30	2.19	5.88	5.94	3.32	5.05	5.46	4.62	5.88	8.12	5.25	6.68	2.76	3.42	3.54	3.09	3.48
Ba	172.80	208.31	160.70	180.60	171.36	446.67	394.25	439.75	426.89	436.78	540.73	548.37	387.79	544.55	466.17	260.98	310.79	246.74	285.89	278.77
La	7.89	9.02	8.18	8.36	8.14	40.74	39.40	38.12	39.42	40.08	41.33	43.18	40.95	42.25	41.60	10.97	13.61	8.97	12.29	11.29
Ce	18.06	19.93	17.55	18.51	18.04	79.90	76.81	76.98	77.89	78.89	80.79	87.51	81.96	84.15	83.06	25.87	32.43	19.17	29.15	25.80
Pr	2.56	2.91	2.72	2.73	2.67	9.14	8.72	8.66	8.84	8.99	9.27	9.85	9.51	9.56	9.53	3.60	4.72	2.78	4.16	3.75
Nd	10.72	11.44	10.64	10.93	10.76	30.90	29.48	29.45	29.94	30.42	30.57	32.91	32.10	31.74	31.92	13.84	18.35	10.31	16.10	14.33
Sm	2.45	2.26	2.07	2.26	2.26	6.26	5.71	5.61	5.86	6.06	6.06	6.49	7.07	6.27	6.67	3.03	3.67	1.91	3.35	2.79
Eu	0.53	0.51	0.54	0.53	0.53	0.71	0.66	0.66	0.68	0.69	0.72	0.73	0.70	0.72	0.71	0.63	0.75	0.70	0.69	0.72
Gd	1.86	1.74	1.64	1.75	1.75	6.23	5.88	5.72	5.94	6.08	6.06	6.45	6.92	6.26	6.59	2.79	2.97	1.53	2.88	2.25
Tb	0.27	0.27	0.27	0.27	0.27	0.80	0.75	0.71	0.75	0.78	0.77	0.83	1.01	0.80	0.91	0.42	0.53	0.25	0.47	0.39
Dy	1.37	1.30	1.21	1.29	1.29	3.84	3.47	3.14	3.48	3.66	3.45	3.96	4.75	3.70	4.23	2.39	2.86	1.16	2.62	2.01
Ho	0.22	0.26	0.24	0.24	0.23	0.75	0.71	0.65	0.71	0.73	0.71	0.75	0.88	0.73	0.81	0.43	0.60	0.21	0.52	0.41
Er	0.56	0.59	0.58	0.58	0.57	2.20	2.00	1.81	2.00	2.10	2.04	2.10	2.35	2.07	2.21	1.20	1.49	0.51	1.34	1.00
Tm	0.08	0.09	0.08	0.08	0.08	0.31	0.27	0.25	0.28	0.29	0.28	0.28	0.32	0.28	0.30	0.17	0.25	0.07	0.21	0.16
Yb	0.45	0.51	0.50	0.49	0.48	2.04	1.78	1.56	1.80	1.92	1.80	1.85	1.98	1.82	1.90	1.03	1.39	0.45	1.21	0.92
Lu	0.08	0.07	0.07	0.07	0.07	0.32	0.28	0.26	0.29	0.31	0.29	0.28	0.29	0.28	0.29	0.16	0.22	0.06	0.19	0.14
Hf	2.59	2.50	2.66	2.58	2.61	5.67	5.62	5.18	5.49	5.58	5.00	4.86	5.05	4.93	4.99	3.95	3.24	2.30	3.59	2.77
Ta	0.24	0.25	0.26	0.25	0.25	1.38	0.98	0.84	1.06	1.22	0.93	1.11	1.50	1.02	1.26	0.51	0.42	0.22	0.47	0.32
W	0.11	0.15	0.17	0.14	0.14	0.22	0.20	0.23	0.21	0.22	0.25	0.26	0.23	0.26	0.24	0.54	0.84	0.64	0.69	0.74
Tl	0.32	0.31	0.28	0.30	0.30	0.96	0.94	0.81	0.91	0.94	0.82	0.88	0.93	0.85	0.89	0.35	0.39	0.58	0.37	0.49
Pb	11.59	12.02	11.66	11.76	11.67	22.84	21.37	19.21	21.14	21.99	20.90	17.62	17.93	19.26	18.60	12.87	14.23	2.95	13.55	8.59
Bi	0.03	0.02	0.02	0.02	0.02	0.06	0.06	0.07	0.06	0.06	0.06	0.04	0.05	0.05	0.05	0.09	0.11	0.13	0.10	0.12
Th	2.16	2.38	2.24	2.26	2.22	16.58	16.93	19.22	17.57	17.08	30.65	19.31	28.75	24.98	26.86	4.83	5.33	1.49	5.08	3.41
U	0.84	0.85	0.85	0.85	0.85	3.66	3.37	6.74	4.59	4.13	2.83	4.33	3.56	3.58	3.57	1.67	1.64	0.91	1.66	1.27
Sr/Y	64.92	60.46	66.57	63.98	65.16	12.73	12.98	13.62	13.11	12.92	14.59	13.20	10.66	13.89	12.28	23.11	20.84	11.13	21.98	15.99
La/Yb	17.55	17.60	16.43	17.19	17.06	19.96	22.10	24.39	22.15	21.05	22.94	23.37	20.63	23.15	21.89	10.63	9.82	19.83	10.22	14.82
ΣREE	53.26	57.28	52.22	54.25	53.25	208.36	198.28	194.21	200.28	204.32	206.46	220.42	216.92	213.44	215.18	78.24	98.99	63.48	88.61	81.23
注：主量元素含量为%，微量元素含量为10⁻⁶。

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表 7 都兰地区希望沟(XW-12)和浪木日(LMR-9)花岗岩Sr–Nd同位素分析结果统计表

Table 7. Sr–Nd isotope analysis results of Xiwanggou (XW-12) and Langmuri (LMR-9) granites in Dulan area

样品	t	⁸⁷Rb/⁸⁶Sr	⁸⁷Sr/⁸⁶Sr	2σ	(⁸⁷Sr/⁸⁶Sr)i	¹⁴⁷Sm/¹⁴⁴Nd	¹⁴³Nd/¹⁴⁴Nd	2σ	εNd(t)	TDM	TDMC
XW-12-1	404.2	0.703 068	0.712 507	0.000 006	0.708 460	0.149 059	0.512 511	0.000 007	−0.02	1 509	1 151
XW-12-2	404.2	0.679 441	0.712 399	0.000 007	0.708 488	0.150 046	0.512 537	0.000 007	0.44	1 470	1 114
XW-12-3	404.2	2.241 488	0.719 008	0.000 006	0.706 106	0.138 614	0.512 619	0.000 009	2.63	1 081	935
LMR-9-1	431.2	0.411 167	0.707 943	0.000 008	0.705 418	0.145 764	0.512 503	0.000 009	0.17	1 454	1 157
LMR-9-2	431.2	0.414 724	0.707 912	0.000 010	0.705 365	0.143 810	0.512 486	0.000 010	−0.05	1 450	1 176
LMR-9-3	431.2	0.400 268	0.707 862	0.000 011	0.705 404	0.142 422	0.512 495	0.000 009	0.2	1 403	1 155

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表 8 都兰地区浪木日花岗岩（LMR-9）锆石Hf同位素分析结果统计表

Table 8. Zircon Hf isotope analysis results of the Langmuri granite (LMR-9) in the Dulan area

测点号	¹⁷⁶Lu/¹⁷⁷Hf	¹⁷⁶Yb/¹⁷⁷Hf	¹⁷⁶Hf/¹⁷⁷Hf	1σ	年龄（Ma）	εHf(0)	εHf(t)	TDM	TDMC	fs
LMR-9-02	0.001 02	0.040 28	0.281 96	0.000 02	433.500	−28.7	−19.445	1 816	2 641	−0.969 158
LMR-9-04	0.000 06	0.002 72	0.282 26	0.000 02	430.856	−18.2	−8.776	1 370	1 970	−0.998 141
LMR-9-07	0.000 40	0.015 83	0.282 61	0.000 02	413.270	−5.8	3.176	898	1 200	−0.988 073
LMR-9-08	0.000 07	0.002 90	0.282 28	0.000 02	429.622	−17.3	−7.856	1 334	1 911	−0.997 936
LMR-9-09	0.001 00	0.040 40	0.282 10	0.000 02	428.381	−23.7	−14.589	1 620	2 334	−0.969 885
LMR-9-10	0.000 54	0.023 66	0.282 24	0.000 02	431.785	−18.9	−9.598	1 415	2 023	−0.983 855
LMR-9-11	0.000 39	0.018 30	0.282 24	0.000 02	431.293	−18.9	−9.548	1 409	2 019	−0.988 149
LMR-9-17	0.000 03	0.001 52	0.282 22	0.000 02	432.107	−19.6	−10.153	1 424	2 058	−0.999 027
LMR-9-19	0.000 17	0.007 71	0.282 34	0.000 02	422.247	−15.4	−6.147	1 264	1 798	−0.994 911
LMR-9-23	0.000 04	0.001 70	0.282 16	0.000 01	424.241	−21.6	−12.253	1 498	2 184	−0.998 878

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表 9 都兰地区希望沟花岗岩（XW-12）锆石Hf同位素分析结果统计表

Table 9. Zircon Hf isotope analysis results of Xixigou granite (XW-12) in Dulan area

测点号	¹⁷⁶Lu/¹⁷⁷Hf	¹⁷⁶Yb/¹⁷⁷Hf	¹⁷⁶Hf/¹⁷⁷Hf	1σ	年龄（Ma）	εHf(0)	εHf(t)	TDM	TDMC	fs
XW-12-03	0.000 70	0.029 57	0.282 88	0.000 02	402.183	3.8	12.490	523	597	−0.978 974
XW-12-05	0.001 00	0.043 04	0.282 86	0.000 02	401.979	3	11.628	559	652	−0.969 740
XW-12-06	0.000 13	0.005 96	0.282 22	0.000 02	404.299	−19.4	−10.597	1 420	2 065	−0.996 001
XW-12-07	0.002 47	0.095 41	0.282 44	0.000 02	402.146	−11.6	−3.438	1 189	1 611	−0.925 707
XW-12-08	0.000 98	0.039 53	0.282 82	0.000 02	403.495	1.7	10.338	611	736	−0.970 458
XW-12-09	0.001 77	0.079 19	0.282 84	0.000 02	403.356	2.3	10.751	599	709	−0.946 745
XW-12-17	0.000 79	0.033 14	0.282 86	0.000 02	404.089	3.2	11.863	550	639	−0.976 080
XW-12-19	0.000 49	0.020 10	0.282 42	0.000 02	409.077	−12.5	−3.655	1 163	1 630	−0.985 350
XW-12-21	0.002 24	0.086 49	0.282 42	0.000 02	403.594	−12.4	−4.140	1 214	1 656	−0.932 477
XW-12-22	0.000 93	0.037 91	0.282 82	0.000 02	401.470	1.7	10.265	612	739	−0.971 948
XW-12-23	0.000 65	0.026 48	0.282 87	0.000 02	406.677	3.5	12.284	535	614	−0.980 550

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