内蒙朝克山辉长岩中单斜辉石矿物化学特征及地质意义

张永玲; 张治国; 刘希军; 田昊; 李得超; 肖让; 肖尧

doi:10.12401/j.nwg.2023027

内蒙朝克山辉长岩中单斜辉石矿物化学特征及地质意义

1.
河西学院土木工程学院，甘肃张掖　734000

2.
桂林理工大学，广西隐伏金属矿产勘查重点实验室，广西有色金属隐伏矿床勘查及材料开发协同创新中心，广西桂林　541004

3.
中国科学院新疆生态与地理研究所新疆矿产资源研究中心，新疆乌鲁木齐　830011

基金项目: 国家自然科学基金（92055208），广西自然科学基金杰出青年科学基金（2018GXNSFFA281009），广西八桂学者项目“有色金属成矿理论与勘查技术”（2018），甘肃省高等学校创新基金项目（2021A-118），广西研究生教育创新计划项目（YCBZ2021063）联合资助

详细信息

作者简介: 张永玲（1977−），女，硕士，副教授，主要从事水利工程研究。E−mail：zhangyl5266@163.com

通讯作者: 张治国（1991− )，男，博士，讲师，主要从事蛇绿岩及构造−岩浆作用研究。E−mail：zhangzhiguo1231@163.com。

中图分类号: P588.14

收稿日期: 2022-06-20

修回日期: 2023-11-05

刊出日期: 2024-02-20

Mineralogical Chemistry Characteristics and Geological Significance of the Clinopyroxene from Chaokeshan Gabbro, Inner Mongolia

1.
College of Civil Engineering, Hexi University, Zhangye 734000, Gansu, China

2.
Guangxi Key Laboratory of Hidden Metallic Ore Deposits Exploration, College of Earth Sciences, Guilin, University of Technology, Guilin 541004, Guangxi, China

3.
Xinjiang Research Center for Mineral Resources, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, Xinjiang, China

More Information

Corresponding author: ZHANG Zhiguo, zhangzhiguo1231@163.cm

Received Date: 20 June 2022

Revised Date: 05 November 2023

Publish Date: 20 February 2024

摘要

摘要:
内蒙贺根山带广泛发育古生代基性岩浆岩，为探讨其岩浆源区和岩石成因，进一步了解中亚造山带东段古生代构造背景，笔者对朝克山蛇绿岩进行了矿物学研究。矿物电子探针结果显示，辉长岩中单斜辉石均属于透辉石，既有碱性特征，也有拉斑特征，SiO₂含量为50.75%～52.99%，具有高的Al₂O₃，含量为2.03%～3.77%，相对亏损轻稀土元素(La/Sm)_N=0.12～0.22和高场强元素（HFSE；Nb、Ta、Zr、Hf、Ti负异常），富集大离子亲石元素（LILEs），与辉长岩全岩的特征程度相一致，共同指示岩体母岩浆可能为亚碱性的拉斑玄武质岩浆向碱性玄武质岩浆演化的趋势。单斜辉石的平衡温度为1099～1242 ℃，平衡压力为1.5～6.4 kbar，深度为5～21 km，显示明显的深源特征。结合前人研究成果，笔者认为朝克山蛇绿岩形成于弧后盆地环境。
- 朝克山蛇绿岩 /
- 单斜辉石 /
- 矿物学 /
- 弧后盆地
Abstract:
Paleozoic mafic magmatic rocks are widely developed in Hegenshan belt of Inner Mongolia. In order to explore the magmatic source and petrological genesis of these rocks and to further understand the Paleozoic tectonic setting of the eastern part of the Central Asian orogenic belt, the Chaokeshan ophiolites are studied by mineralogy. Mineral electron probe results show that the monocline in gabbro belongs to diopside, which has both alkaline and tholeitic characteristic, with SiO₂ (50.75% to 52.99%) and high Al₂O₃ (2.03% to 3.77%), and are relatively enriched large ion lithophile elements, but depleted in light rare earth elements ((La/Sm)_N=0.12～0.22) and in high field strength elements (e.g. Nb, Ta, Zr, Hf, Ti), consistent with the characteristics of the whole gabbro rock, indicating that the parent magma of the pluton may be subalkaline tholeitic magma to alkaline basalt magma evolution trend. The temperature and pressure of clinopyroxene are 1099～1242 ℃, 1.5～6.4 kbar and 5～21 km respectively, suggesting obvious deep-derived characteristics. Combined with the previous research results, it’s suggest that the Chaokeshan ophiolites was likely produced in the back-arc tectonic setting.
- Chaokeshan ophiolites /
- clinopyroxene /
- mineralogy /
- back–arc basin

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图 1 中亚造山带主要构造单元构造图（a）及研究区大地构造位置示意图（b）（据王树庆等，2008）

Figure 1.

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图 2 朝克山地区地质简图（据王树庆等，2008）

Figure 2.

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图 3 朝克山地区辉长岩的野外露头（a～b）、显微照片（d～f）及单斜辉石环带结构背散电子图（g～h）

Figure 3.

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图 4 朝克山蛇绿岩中辉长岩的单斜辉石图解（据Mahoney et al.，1998）

Figure 4.

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图 5 朝克山蛇绿岩中辉长岩的单斜辉石REE球粒陨石标准化图(a)和不相容元素原始地幔标准化图解(b)

Figure 5.

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图 6 朝克山蛇绿岩中辉长岩的单斜辉石图解（据Aoki et al.，1973；邱家骧等，1996）

Figure 6.

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图 7 朝克山蛇绿岩中辉长岩的单斜辉石图解（据邱家骧等，1996）

Figure 7.

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图 8 朝克山蛇绿岩中辉长岩的单斜辉石在F1–F2双因子判别图解（据邱家骧等，1987）

Figure 8.

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表 1 朝克山辉长岩的单斜辉石的主量元素组成分析结果表（%）

Table 1. Major element compositions (%) of clinopyroxene in Chaokeshan gabbro

样品	CKS-08- 01-1	CKS-08- 01-2	CKS-08- 01-3	CKS-08- 01-4	CKS-08- 01-5	CKS-08- 01-6	CKS-08- 01-7	CKS-08- 01-8	CKS-08- 01-9	CKS-08- 01-10
SiO₂	52.35	52.57	52.34	52.65	52.34	52.62	52.61	51.86	52.16	52.30
TiO₂	0.61	0.50	0.69	0.76	0.46	0.62	0.72	0.69	0.61	0.52
Al₂O₃	2.62	2.51	2.76	2.64	2.65	2.62	2.61	2.70	2.70	2.90
Cr₂O₃	0.37	0.28	0.38	0.39	0.35	0.35	0.36	0.38	0.38	0.38
FeO*	5.92	6.42	6.20	6.15	5.89	6.07	5.95	6.20	5.86	5.73
MnO	0.19	0.20	0.20	0.16	0.17	0.18	0.17	0.18	0.19	0.15
MgO	13.69	14.12	13.79	13.69	13.68	13.80	13.90	14.01	13.81	13.98
CaO	23.92	23.59	23.87	24.05	24.23	24.04	24.12	24.00	23.95	24.03
Na₂O	0.37	0.36	0.39	0.37	0.31	0.38	0.36	0.40	0.40	0.36
K₂O	0.00	0.00	0.00	0.00	0.01	0.00	0.00	0.00	0.01	0.00
Toal	100.03	100.55	100.62	100.84	100.08	100.67	100.80	100.43	100.06	100.34
Si	1.937	1.937	1.928	1.934	1.936	1.935	1.932	1.917	1.930	1.927
Al^Ⅳ	0.063	0.063	0.072	0.066	0.064	0.065	0.068	0.083	0.070	0.073
Al^Ⅵ	0.051	0.046	0.048	0.048	0.052	0.049	0.045	0.035	0.048	0.053
Ti	0.017	0.014	0.019	0.021	0.013	0.017	0.020	0.019	0.017	0.015
Cr	0.011	0.008	0.011	0.011	0.010	0.010	0.011	0.011	0.011	0.011
Fe²⁺	0.183	0.198	0.191	0.189	0.182	0.187	0.183	0.192	0.181	0.176
Mn	0.006	0.006	0.006	0.005	0.005	0.005	0.005	0.006	0.006	0.005
Mg	0.755	0.775	0.757	0.750	0.754	0.756	0.761	0.772	0.762	0.768
Ca	0.948	0.931	0.942	0.946	0.960	0.947	0.949	0.950	0.949	0.949
Na	0.026	0.026	0.028	0.026	0.022	0.027	0.025	0.029	0.029	0.026
Mg^#	80.46	79.69	79.86	79.89	80.54	80.22	80.65	80.11	80.79	81.32
Fs	9.72	10.38	10.11	10.02	9.61	9.87	9.65	10.02	9.57	9.32
En	40.02	40.72	40.06	39.78	39.77	40.02	40.21	40.34	40.26	40.56
Wo	50.26	48.90	49.83	50.21	50.62	50.12	50.13	49.64	50.16	50.12

样品	CKS-08- 01-11	CKS-08- 01-12	CKS-08- 01-13	CKS-08- 01-14	CKS-08- 01-15	CKS-08- 02-1	CKS-08- 02-2	CKS-08- 02-3	CKS-08- 02-4	CKS-08- 02-5
SiO₂	52.29	52.42	52.23	52.72	52.00	52.02	52.86	52.46	52.38	52.99
TiO₂	0.77	0.78	0.75	0.57	0.51	0.53	0.65	0.67	0.64	0.62
Al₂O₃	2.82	2.68	2.67	2.59	2.40	2.68	2.49	2.50	2.64	2.31
Cr₂O₃	0.40	0.38	0.33	0.35	0.41	0.27	0.24	0.23	0.31	0.24
FeO*	5.93	6.10	5.70	5.73	6.33	5.98	6.44	6.48	6.04	5.81
MnO	0.16	0.19	0.19	0.17	0.21	0.21	0.17	0.20	0.18	0.21
MgO	13.95	13.98	13.85	13.78	14.25	13.63	14.12	14.13	14.30	14.10
CaO	24.03	23.61	24.39	24.38	23.55	23.73	23.74	23.31	23.14	24.17
Na₂O	0.37	0.35	0.35	0.29	0.36	0.30	0.34	0.34	0.35	0.33
K₂O	0.00	0.00	0.00	0.00	0.00	0.00	0.01	0.00	0.00	0.00
Toal	100.71	100.48	100.46	100.58	100.02	99.35	101.05	100.32	99.97	100.79
Si	1.923	1.930	1.926	1.939	1.929	1.937	1.937	1.936	1.935	1.944
Al^Ⅳ	0.077	0.070	0.074	0.061	0.071	0.063	0.063	0.064	0.065	0.056
Toal	100.71	100.48	100.46	100.58	100.02	99.35	101.05	100.32	99.97	100.79
Si	1.923	1.930	1.926	1.939	1.929	1.937	1.937	1.936	1.935	1.944
Al^Ⅳ	0.077	0.070	0.074	0.061	0.071	0.063	0.063	0.064	0.065	0.056

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续表1
样品	CKS-08- 01-11	CKS-08- 01-12	CKS-08- 01-13	CKS-08- 01-14	CKS-08- 01-15	CKS-08- 02-1	CKS-08- 02-2	CKS-08- 02-3	CKS-08- 02-4	CKS-08- 02-5
Al^Ⅵ	0.045	0.047	0.042	0.051	0.033	0.055	0.045	0.045	0.050	0.044
Ti	0.021	0.021	0.021	0.016	0.014	0.015	0.018	0.019	0.018	0.017
Cr	0.012	0.011	0.010	0.010	0.012	0.008	0.007	0.007	0.009	0.007
Fe²⁺	0.182	0.188	0.176	0.176	0.196	0.186	0.197	0.200	0.187	0.178
Mn	0.005	0.006	0.006	0.005	0.007	0.006	0.005	0.006	0.006	0.007
Mg	0.765	0.767	0.761	0.755	0.788	0.757	0.771	0.777	0.788	0.771
Ca	0.947	0.931	0.964	0.960	0.936	0.947	0.932	0.922	0.916	0.950
Na	0.027	0.025	0.025	0.020	0.026	0.022	0.024	0.024	0.025	0.024
Mg^#	80.75	80.34	81.24	81.09	80.06	80.25	79.63	79.55	80.84	81.22
Fs	9.63	9.96	9.25	9.31	10.22	9.86	10.38	10.53	9.87	9.39
En	40.39	40.67	40.05	39.93	41.04	40.04	40.58	40.94	41.67	40.59
Wo	49.98	49.37	50.70	50.76	48.74	50.10	49.04	48.54	48.46	50.02

样品	CKS-08- 02-6	CKS-08- 02-7	CKS-08- 02-8	CKS-08- 02-9	CKS-08- 02-10	CKS-08- 02-11	CKS-08- 02-12	CKS-08- 02-13	CKS-08- 02-14	CKS-08- 02-15
SiO₂	52.54	52.49	52.12	52.42	52.79	52.49	51.92	52.75	52.91	52.74
TiO₂	0.60	0.54	0.77	0.60	0.56	0.57	0.57	0.51	0.47	0.51
Al₂O₃	2.46	2.03	2.49	2.31	2.56	2.68	2.83	2.39	2.54	2.59
Cr₂O₃	0.24	0.28	0.27	0.25	0.42	0.36	0.29	0.28	0.20	0.27
FeO*	5.70	5.93	5.80	6.24	5.97	5.88	5.70	5.78	5.87	5.96
MnO	0.18	0.19	0.19	0.19	0.19	0.17	0.16	0.19	0.19	0.18
MgO	14.30	14.10	14.26	14.83	13.99	14.06	13.90	13.91	13.75	13.90
CaO	23.99	23.84	23.60	22.91	23.76	23.85	23.98	23.74	23.93	24.02
Na₂O	0.30	0.29	0.28	0.31	0.37	0.38	0.31	0.32	0.36	0.35
K₂O	0.01	0.00	0.00	0.01	0.01	0.00	0.01	0.01	0.01	0.00
Toal	100.31	99.69	99.78	100.07	100.61	100.44	99.68	99.86	100.24	100.52
Si	1.936	1.948	1.931	1.936	1.940	1.933	1.927	1.950	1.950	1.940
Al^Ⅳ	0.064	0.052	0.069	0.064	0.060	0.067	0.073	0.050	0.050	0.060
Al^Ⅵ	0.043	0.037	0.040	0.037	0.051	0.049	0.051	0.054	0.060	0.053
Ti	0.017	0.015	0.021	0.017	0.015	0.016	0.016	0.014	0.013	0.014
Cr	0.007	0.008	0.008	0.007	0.012	0.011	0.009	0.008	0.006	0.008
Fe²⁺	0.176	0.184	0.180	0.193	0.184	0.181	0.177	0.179	0.181	0.183
Mn	0.005	0.006	0.006	0.006	0.006	0.005	0.005	0.006	0.006	0.006
Mg	0.786	0.780	0.787	0.816	0.767	0.772	0.769	0.767	0.755	0.762
Ca	0.947	0.948	0.937	0.906	0.935	0.941	0.953	0.940	0.945	0.947
Na	0.021	0.021	0.020	0.022	0.026	0.027	0.023	0.023	0.026	0.025
Mg^#	81.73	80.92	81.41	80.90	80.68	80.99	81.30	81.11	80.68	80.60
Fs	9.21	9.62	9.44	10.06	9.73	9.56	9.31	9.47	9.62	9.70
En	41.17	40.81	41.35	42.62	40.65	40.74	40.50	40.66	40.15	40.28
Wo	49.63	49.57	49.21	47.32	49.61	49.69	50.19	49.87	50.23	50.02

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续表1
样品	CKS-08- 02-16	CKS-08- 02-17	CKS-08- 04-1	CKS-08- 04-2	CKS-08- 04-3	CKS-08- 04-4	CKS-08- 04-5	CKS-08- 04-6	CKS-08- 04-7	CKS-08- 04-8
SiO₂	52.32	52.54	52.91	52.73	51.99	52.04	51.67	52.25	52.04	51.57
TiO₂	0.58	0.74	0.45	0.43	0.60	0.76	0.59	0.51	0.51	0.56
Al₂O₃	2.53	2.82	2.44	2.38	2.74	2.75	2.88	2.40	2.26	2.67
Cr₂O₃	0.21	0.23	0.48	0.42	0.41	0.50	0.45	0.41	0.38	0.50
FeO*	5.97	5.88	5.48	5.72	5.33	5.33	5.57	5.17	5.92	5.33
MnO	0.20	0.20	0.17	0.18	0.16	0.15	0.17	0.15	0.17	0.15
MgO	13.76	13.84	15.11	15.36	15.41	15.39	15.65	15.25	15.56	15.18
CaO	24.12	24.09	23.52	23.28	23.91	23.35	23.30	23.01	23.09	23.95
Na₂O	0.40	0.37	0.38	0.42	0.31	0.32	0.34	0.30	0.35	0.32
K₂O	0.00	0.00	0.00	0.02	0.00	0.02	0.00	0.01	0.00	0.00
Toal	100.09	100.70	100.93	100.94	100.87	100.60	100.61	99.45	100.27	100.23
Si	1.936	1.930	1.934	1.929	1.906	1.909	1.899	1.934	1.920	1.904
Al^Ⅳ	0.064	0.070	0.066	0.071	0.094	0.091	0.101	0.066	0.080	0.096
Al^Ⅵ	0.046	0.052	0.039	0.032	0.024	0.028	0.024	0.039	0.018	0.020
Ti	0.016	0.020	0.012	0.012	0.017	0.021	0.016	0.014	0.014	0.016
Cr	0.006	0.007	0.014	0.012	0.012	0.014	0.013	0.012	0.011	0.015
Fe²⁺	0.185	0.181	0.167	0.175	0.163	0.164	0.171	0.160	0.183	0.165
Mn	0.006	0.006	0.005	0.006	0.005	0.005	0.005	0.005	0.005	0.005
Mg	0.759	0.758	0.823	0.838	0.842	0.842	0.857	0.841	0.856	0.836
Ca	0.956	0.948	0.921	0.912	0.939	0.918	0.917	0.912	0.912	0.948
Na	0.029	0.027	0.027	0.029	0.022	0.022	0.024	0.021	0.025	0.023
Mg^#	80.42	80.76	83.10	82.72	83.76	83.73	83.36	84.02	82.40	83.55
Fs	9.72	9.57	8.76	9.09	8.40	8.51	8.80	8.36	9.37	8.45
En	39.95	40.17	43.07	43.52	43.32	43.77	44.06	43.97	43.87	42.90
Wo	50.33	50.26	48.17	47.40	48.29	47.72	47.14	47.67	46.77	48.65

样品	CKS-08- 04-8	CKS-08- 04-10	CKS-08- 04-11	CKS-08- 04-12	CKS-08- 04-13	CKS-08- 04-14	CKS-08- 06-1	CKS-08- 06-2	CKS-08- 06-3	CKS-08- 06-4
SiO₂	51.92	52.08	51.97	52.50	52.40	51.76	51.20	51.29	50.75	51.80
TiO₂	0.56	0.38	0.53	0.78	0.52	0.65	0.67	0.68	0.27	0.42
Al₂O₃	2.55	2.40	2.97	2.85	2.79	2.64	2.84	2.85	3.22	3.30
Cr₂O₃	0.41	0.38	0.35	0.48	0.43	0.42	0.01	0.01	0.03	0.11
FeO*	5.08	5.63	6.12	5.67	5.50	5.59	9.14	9.13	9.69	7.16
MnO	0.17	0.18	0.20	0.21	0.19	0.15	0.12	0.22	0.29	0.18
MgO	15.36	15.52	15.81	14.99	15.14	15.66	13.14	13.74	13.13	14.28
CaO	23.71	23.52	22.00	23.04	23.07	22.86	21.53	21.52	21.53	22.40
Na₂O	0.33	0.33	0.33	0.35	0.36	0.29	0.39	0.39	0.38	0.31
K₂O	0.00	0.00	0.01	0.01	0.00	0.00	0.00	0.00	0.00	0.01
Toal	100.10	100.41	100.28	100.88	100.39	100.02	99.03	99.82	99.29	99.97
Si	1.915	1.918	1.911	1.920	1.924	1.910	1.930	1.919	1.915	1.919
Al^Ⅳ	0.085	0.082	0.089	0.080	0.076	0.090	0.070	0.081	0.085	0.081
Al^Ⅵ	0.026	0.022	0.040	0.043	0.045	0.025	0.056	0.044	0.059	0.063

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续表1
样品	CKS-08- 04-8	CKS-08- 04-10	CKS-08- 04-11	CKS-08- 04-12	CKS-08- 04-13	CKS-08- 04-14	CKS-08- 06-1	CKS-08- 06-2	CKS-08- 06-3	CKS-08- 06-4
Ti	0.015	0.011	0.015	0.022	0.014	0.018	0.019	0.019	0.008	0.012
Cr	0.012	0.011	0.010	0.014	0.013	0.012	0.000	0.000	0.001	0.003
Fe²⁺	0.157	0.173	0.188	0.173	0.169	0.173	0.288	0.286	0.306	0.222
Mn	0.005	0.006	0.006	0.007	0.006	0.005	0.004	0.007	0.009	0.006
Mg	0.845	0.852	0.867	0.817	0.829	0.862	0.738	0.767	0.738	0.789
Ca	0.937	0.928	0.867	0.903	0.908	0.904	0.869	0.863	0.870	0.889
Na	0.024	0.023	0.023	0.025	0.025	0.021	0.028	0.028	0.028	0.023
Mg^#	84.34	83.08	82.17	82.50	83.08	83.32	71.92	72.86	70.72	78.06
Fs	8.09	8.88	9.79	9.15	8.86	8.90	15.20	14.92	15.97	11.67
En	43.58	43.61	45.11	43.16	43.49	44.46	38.94	40.04	38.57	41.52
Wo	48.34	47.51	45.10	47.68	47.65	46.64	45.86	45.05	45.46	46.81

样品	CKS-08- 06-5	CKS-08- 06-6	CKS-08- 06-7	CKS-08- 06-8	CKS-08- 06-9	CKS-08- 06-10	CKS-08- 06-11	CKS-08- 06-12	CKS-08- 06-13	CKS-08- 06-14
SiO₂	51.34	50.95	52.18	51.95	52.18	50.99	52.03	51.41	51.50	51.50
TiO₂	0.79	0.54	0.47	0.59	0.49	0.83	0.64	0.86	0.66	0.75
Al₂O₃	3.32	3.77	3.09	2.99	3.17	3.58	2.74	2.78	3.36	3.52
Cr₂O₃	0.07	0.09	0.13	0.13	0.22	0.13	0.03	0.02	0.02	0.10
FeO*	7.93	6.13	5.69	5.66	6.03	8.45	8.68	9.52	8.14	7.15
MnO	0.21	0.18	0.16	0.14	0.18	0.20	0.20	0.23	0.21	0.18
MgO	13.84	14.50	14.82	14.79	15.11	13.45	13.84	13.32	14.02	14.37
CaO	21.86	22.05	22.38	22.55	22.32	21.88	21.80	21.50	22.18	22.24
Na₂O	0.38	0.26	0.26	0.26	0.36	0.43	0.38	0.39	0.39	0.36
K₂O	0.00	0.01	0.00	0.01	0.00	0.00	0.00	0.00	0.00	0.00
Toal	99.72	98.48	99.18	99.04	100.06	99.93	100.34	100.03	100.46	100.17
Si	1.913	1.908	1.934	1.930	1.922	1.902	1.931	1.922	1.908	1.905
Al^Ⅳ	0.087	0.092	0.066	0.070	0.078	0.098	0.069	0.078	0.092	0.095
Al^Ⅵ	0.059	0.074	0.069	0.061	0.059	0.060	0.051	0.045	0.054	0.058
Ti	0.022	0.015	0.013	0.016	0.014	0.023	0.018	0.024	0.018	0.021
Cr	0.002	0.003	0.004	0.004	0.006	0.004	0.001	0.000	0.001	0.003
Fe²⁺	0.247	0.192	0.176	0.176	0.186	0.264	0.269	0.298	0.252	0.221
Mn	0.007	0.006	0.005	0.004	0.006	0.006	0.006	0.007	0.006	0.005
Mg	0.769	0.809	0.819	0.819	0.829	0.748	0.766	0.742	0.774	0.792
Ca	0.873	0.884	0.889	0.897	0.880	0.874	0.867	0.861	0.880	0.881
Na	0.027	0.019	0.019	0.018	0.025	0.031	0.027	0.028	0.028	0.026
Mg^#	75.68	80.84	82.27	82.32	81.70	73.93	73.98	71.39	75.45	78.18
Fs	13.08	10.17	9.37	9.29	9.80	13.98	14.16	15.65	13.22	11.67
En	40.71	42.93	43.46	43.28	43.75	39.65	40.27	39.05	40.62	41.82
Wo	46.21	46.90	47.17	47.43	46.45	46.37	45.57	45.30	46.16	46.51

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续表1
样品	CKS-08-06-15	CKS-08-06-16	CKS-08-06-17	CKS-08-06-18
SiO₂	52.30	52.79	52.25	52.24
TiO₂	0.46	0.55	0.49	0.61
Al₂O₃	2.45	2.32	3.41	3.21
Cr₂O₃	0.13	0.06	0.24	0.18
FeO*	6.99	6.03	5.79	6.75
MnO	0.16	0.11	0.16	0.17
MgO	14.62	15.22	15.03	14.68
CaO	22.50	22.79	22.38	22.01
Na₂O	0.35	0.28	0.33	0.30
K₂O	0.00	0.01	0.00	0.01
Toal	99.96	100.17	100.07	100.16
Si	1.937	1.942	1.921	1.925
Al^Ⅳ	0.918	0.918	0.905	0.890
Al^Ⅵ	0.063	0.058	0.079	0.075
Ti	0.013	0.015	0.013	0.017
Cr	0.004	0.002	0.007	0.005
Fe²⁺	0.216	0.185	0.178	0.208
Mn	0.005	0.003	0.005	0.005
Mg	0.807	0.835	0.823	0.806
Ca	0.893	0.898	0.881	0.869
Na	0.025	0.020	0.023	0.022
Mg^#	78.86	81.82	82.22	79.51
Fs	11.29	9.67	9.46	11.04
En	42.12	43.51	43.73	42.83
Wo	46.58	46.82	46.81	46.14
注：Mg^# = 100Mg/（Mg+Fe²⁺）；Fs= 100Fe²⁺/（Mg+Ca+Fe²⁺）；En= 100Mg/（Mg+Ca+Fe²⁺）；Wo=100Ca/（Mg+Ca+Fe²⁺）。

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表 2 朝克山辉长岩的单斜辉石的微量元素数据表（10⁻⁶）

Table 2. Trace element compositions of clinopyroxene in gabbro from the Chaokeshan(10⁻⁶)

样品	CKS-08- 01-1	CKS-08- 01-2	CKS-08- 01-3	CKS-08- 01-4	CKS-08- 01-5	CKS-08- 01-6	CKS-08- 01-7	CKS-08- 01-8	CKS-08- 01-9	CKS-08- 01-10
Sc	117.7	108.2	112.3	108.0	104.1	109.3	108.0	108.7	98.07	117.7
V	427.25	410.11	417.14	417.82	387.93	416.56	394.93	427.54	376.24	427.25
Cr	2667	2541	2569	2651	2438	2651	2443	3249	2451	2667
Co	33.09	33.20	35.99	33.74	34.98	36.30	34.34	35.52	34.47	33.09
Ni	135.9	139.4	155.9	157.6	179.4	154.2	139.8	131.1	167.7	135.9
Cu	7.24	12.75	14.01	5.87	36.38	7.54	0.58	3.35	21.82	7.24
Zn	27.70	24.85	25.61	27.55	27.00	26.30	26.70	28.50	32.53	27.70
Ga	4.56	4.50	4.84	4.57	4.42	4.62	3.66	4.91	4.50	4.56
Rb	0.44	0.11	0.00	0.16	0.00	0.01	0.00	0.27	0.19	0.44
Sr	7.20	8.21	8.18	6.74	11.11	8.93	6.32	6.93	6.89	7.20
Y	15.48	15.52	16.05	16.79	15.66	16.41	15.85	16.74	14.73	15.48
Zr	8.37	8.41	9.00	8.09	7.69	8.57	9.35	8.96	7.56	8.37
Nb	0.01	0.03	0.01	0.00	0.01	0.03	0.05	0.01	0.02	0.01
Sn	1.58	1.38	1.70	1.13	1.33	1.60	0.91	1.35	1.61	1.58
Sb	0.51	0.52	1.08	0.65	0.62	0.60	0.77	0.19	0.56	0.51
Ba	0.24	0.21	0.60	0.24	1.49	0.31	0.17	0.36	0.84	0.24
La	0.16	0.16	0.15	0.10	0.24	0.13	0.18	0.09	0.14	0.16
Ce	1.03	1.11	1.20	0.76	0.90	1.03	0.80	0.92	0.69	1.03
Pr	0.27	0.24	0.26	0.23	0.19	0.16	0.17	0.28	0.15	0.27
Nd	1.61	1.49	1.71	2.06	1.94	2.33	1.81	1.99	1.95	1.61
Sm	1.23	1.02	1.36	1.34	1.31	0.78	1.02	1.13	1.29	1.23
Eu	0.43	0.46	0.47	0.55	0.54	0.47	0.48	0.42	0.40	0.43

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续表2
样品	CKS-08- 01-1	CKS-08- 01-2	CKS-08- 01-3	CKS-08- 01-4	CKS-08- 01-5	CKS-08- 01-6	CKS-08- 01-7	CKS-08- 01-8	CKS-08- 01-9	CKS-08- 01-10
Gd	2.36	2.13	2.18	1.80	1.71	2.09	1.60	2.14	2.23	2.36
Tb	0.40	0.33	0.53	0.42	0.36	0.44	0.33	0.45	0.40	0.40
Dy	2.99	2.61	3.00	3.08	2.60	2.97	2.68	3.15	2.50	2.99
Ho	0.59	0.66	0.64	0.59	0.70	0.62	0.65	0.64	0.57	0.59
Er	1.85	1.90	1.94	1.83	1.63	1.91	1.81	1.84	1.50	1.85
Tm	0.19	0.28	0.29	0.22	0.26	0.27	0.17	0.24	0.28	0.19
Yb	1.29	1.68	1.66	1.67	1.44	1.87	1.90	2.23	1.78	1.29
Lu	0.27	0.27	0.27	0.25	0.26	0.24	0.27	0.20	0.19	0.27
Hf	0.56	0.59	0.48	0.45	0.22	0.40	0.59	0.55	0.41	0.56
Ta	0.01	0.01	0.01	0.01	0.02	0.02	0.01	0.01	0.01	0.01

样品	CKS-08- 01-11	CKS-08- 01-12	CKS-08- 02-1	CKS-08- 02-2	CKS-08- 02-3	CKS-08- 02-4	CKS-08- 02-5	CKS-08- 02-6	CKS-08- 02-7	CKS-08- 02-8
Sc	110.8	95.55	108.2	106.0	123.6	104.9	116.1	112.5	123.9	128.0
V	425.11	370.42	415.3	399.8	428.2	392.8	402.6	396.6	414.4	410.5
Cr	2685	2429	1830	1774	2392	1773	2829	1861	2397	1784
Co	36.69	35.57	36.17	43.21	41.14	40.38	37.99	39.38	35.44	33.79
Ni	134.5	160.6	147.2	194.4	186.6	185.8	158.4	150.1	166.4	148.3
Cu	2.44	50.87	16.32	51.45	46.10	30.53	9.46	8.33	9.65	1.98
Zn	25.93	28.61	27.25	37.25	27.40	35.13	27.33	24.60	30.17	22.60
Ga	4.49	4.36	4.97	5.16	5.53	4.56	4.90	3.41	4.91	3.64
Rb	1.45	0.74	0.14	0.02	0.19	0.44	0.14	0.19	0.14	0.14
Sr	8.11	7.81	6.56	6.39	6.89	6.60	8.36	6.55	6.29	6.18
Y	17.24	14.35	16.44	14.76	15.91	16.16	15.98	15.17	16.39	15.39
Zr	9.85	7.55	8.87	8.41	8.68	7.65	8.84	7.37	9.30	7.50
Nb	0.02	0.00	0.00	0.02	0.03	0.01	0.01	0.00	0.02	0.02
Sn	1.54	1.47	1.47	1.35	1.42	1.77	1.44	1.52	1.18	1.61
Sb	0.47	0.23	1.39	0.59	0.14	0.28	0.35	0.26	0.32	0.74
Ba	0.00	0.96	0.41	0.30	0.25	0.31	0.12	0.25	0.19	0.18
La	0.13	0.16	0.17	0.13	0.18	0.19	0.09	0.15	0.07	0.10
Ce	1.13	0.89	0.83	0.67	0.73	0.90	0.76	0.58	0.78	0.70
Pr	0.33	0.26	0.20	0.21	0.18	0.18	0.18	0.24	0.21	0.15
Nd	1.80	2.13	2.08	2.40	1.56	1.97	1.90	1.55	2.16	1.73
Sm	0.73	1.18	1.36	1.14	1.33	0.94	0.96	1.17	1.22	1.15
Eu	0.34	0.49	0.47	0.33	0.52	0.30	0.58	0.42	0.38	0.40
Gd	2.82	1.86	2.10	2.03	2.37	2.50	1.84	2.03	2.05	2.32
Tb	0.44	0.47	0.48	0.41	0.42	0.39	0.38	0.30	0.37	0.36
Dy	3.10	2.53	2.87	2.74	2.96	2.80	2.53	2.74	3.37	3.09
Ho	0.63	0.58	0.68	0.57	0.64	0.61	0.54	0.61	0.74	0.53
Er	1.75	1.46	2.09	1.68	1.86	1.67	1.86	1.74	1.69	1.56

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续表2
样品	CKS-08- 01-11	CKS-08- 01-12	CKS-08- 02-1	CKS-08- 02-2	CKS-08- 02-3	CKS-08- 02-4	CKS-08- 02-5	CKS-08- 02-6	CKS-08- 02-7	CKS-08- 02-8
Tm	0.25	0.30	0.30	0.21	0.30	0.24	0.23	0.24	0.25	0.29
Yb	1.85	1.57	1.66	1.73	1.99	1.41	1.72	1.32	2.15	1.77
Lu	0.26	0.23	0.24	0.26	0.25	0.20	0.21	0.19	0.25	0.23
Hf	0.31	0.49	0.54	0.42	0.40	0.52	0.59	0.42	0.52	0.39
Ta	0.01	0.01	0.01	0.01	0.01	0.01	0.01	0.01	0.01	0.01

样品	CKS-08- 02-9	CKS-08- 02-10	CKS-08- 02-11	CKS-08- 04-1	CKS-08- 04-2	CKS-08- 04-3	CKS-08- 04-4	CKS-08- 04-5	CKS-08- 04-6	CKS-08- 04-7
Sc	95.94	107.1	105.8	109.5	113.7	115.2	98.30	92.56	110.4	107.3
V	359.1	404.5	402.1	387.8	347.8	393.9	323.3	325.4	423.9	412.8
Cr	1589	1657	1729	3133	3011	2949	2466	2762	3518	2997
Co	35.95	36.54	39.57	34.71	41.83	34.02	41.42	39.42	32.94	34.16
Ni	130.8	165.0	168.3	133.5	152.7	126.9	179.0	156.7	129.7	131.7
Cu	20.06	11.27	25.10	7.37	15.16	3.87	47.01	11.52	4.02	3.02
Zn	29.02	27.60	25.93	27.35	30.57	28.85	33.61	27.53	27.22	25.04
Ga	4.40	4.68	4.72	4.58	4.07	4.25	4.51	4.57	4.64	4.15
Rb	0.14	0.14	0.36	0.00	0.02	0.68	0.00	0.00	0.00	0.00
Sr	5.58	6.69	6.61	10.24	7.25	6.84	6.01	5.56	8.01	7.59
Y	13.08	14.14	16.19	15.79	13.13	16.85	13.67	13.67	19.44	17.08
Zr	6.48	6.79	6.34	10.51	7.20	10.95	9.88	9.50	11.50	9.56
Nb	0.02	0.02	0.01	0.05	0.04	0.03	0.02	0.00	0.07	0.03
Sn	1.57	0.87	1.57	0.76	0.68	1.56	1.72	1.04	1.47	1.18
Sb	0.40	0.31	0.14	0.47	0.76	0.37	0.51	0.70	0.22	0.82
Ba	0.18	0.54	0.10	0.44	0.28	0.10	0.56	0.47	0.18	0.01
La	0.10	0.08	0.09	0.18	0.13	0.19	0.07	0.17	0.18	0.17
Ce	0.85	0.74	0.79	0.91	0.67	0.99	0.77	0.86	1.01	0.82
Pr	0.16	0.18	0.14	0.20	0.20	0.30	0.21	0.21	0.28	0.20
Nd	1.83	1.56	1.98	1.94	1.62	2.33	2.15	1.60	2.02	2.09
Sm	1.20	1.40	1.10	1.12	0.96	1.14	0.89	1.12	1.21	0.99
Eu	0.45	0.33	0.35	0.49	0.36	0.52	0.43	0.43	0.53	0.51
Gd	2.36	1.85	1.63	2.12	1.49	2.40	1.37	1.96	2.19	1.58
Tb	0.30	0.45	0.37	0.47	0.37	0.47	0.36	0.36	0.46	0.42
Dy	2.38	2.91	2.54	2.62	2.42	3.37	2.67	2.42	2.93	2.81
Ho	0.56	0.65	0.66	0.54	0.55	0.69	0.56	0.54	0.84	0.60
Er	1.50	1.71	1.74	1.58	1.26	1.71	1.15	1.59	2.08	1.87
Tm	0.21	0.19	0.32	0.28	0.16	0.24	0.17	0.24	0.25	0.26
Yb	1.42	1.53	1.50	1.66	1.08	1.49	1.54	1.25	1.79	1.43
Lu	0.20	0.24	0.35	0.25	0.21	0.21	0.16	0.19	0.31	0.22
Hf	0.31	0.41	0.51	0.41	0.33	0.57	0.34	0.41	0.59	0.38
Ta	0.01	0.01	0.01	0.01	0.01	0.01	0.01	0.01	0.01	0.01

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续表2
样品	CKS-08- 06-1	CKS-08- 06-2	CKS-08- 06-3	CKS-08- 06-4	CKS-08- 06-5	CKS-08- 06-6	CKS-08- 06-7	CKS-08- 06-8	CKS-08- 06-9	CKS-08- 06-10
Sc	135.2	128.9	133.5	130.9	128.6	119.3	113.1	129.9	135.2	128.9
V	403.7	460.0	462.1	337.9	443.4	475.0	410.2	521.3	403.7	460.0
Cr	1863	506.1	593.6	3334	607.2	264.9	1046	268.6	1863	506.1
Co	42.67	48.40	47.82	37.80	47.52	51.55	43.55	48.49	42.67	48.40
Ni	201.7	125.8	132.6	207.3	121.1	116.3	162.7	99.69	201.7	125.8
Cu	21.15	8.99	24.50	1.88	0.00	2.15	0.44	6.07	21.15	8.99
Zn	29.23	42.54	37.28	21.24	37.23	50.13	30.46	46.96	29.23	42.54
Ga	7.01	6.72	7.29	5.85	7.29	6.74	7.04	8.38	7.01	6.72
Rb	0.70	0.00	0.56	0.01	0.00	0.00	0.23	0.00	0.70	0.00
Sr	14.67	13.85	14.57	11.14	12.12	12.60	13.73	12.45	14.67	13.85
Y	15.12	19.10	18.31	13.29	20.75	22.25	17.23	22.97	15.12	19.10
Zr	14.41	14.25	14.56	10.60	14.78	14.16	12.17	17.56	14.41	14.25
Nb	0.03	0.01	0.01	0.00	0.00	0.00	0.03	0.01	0.03	0.01
Sn	1.45	1.59	1.81	1.27	1.52	1.63	1.19	1.33	1.45	1.59
Sb	0.00	0.00	0.07	0.01	0.00	0.01	0.06	0.04	0.00	0.00
Ba	1.91	2.67	2.27	0.00	0.00	1.87	0.31	2.66	1.91	2.67
La	0.22	0.32	0.21	0.19	0.29	0.20	0.38	0.28	0.22	0.32
Ce	1.29	1.23	1.23	0.71	1.42	1.52	1.27	1.29	1.29	1.23
Pr	0.20	0.34	0.30	0.24	0.40	0.42	0.24	0.48	0.20	0.34
Nd	1.78	3.09	2.59	1.62	0.00	3.28	2.52	3.88	1.78	3.09
Sm	1.09	1.84	1.72	0.96	1.88	1.50	1.59	1.91	1.09	1.84
Eu	0.48	0.65	0.77	0.47	0.69	0.74	0.68	0.71	0.48	0.65
Gd	2.24	3.12	3.05	1.80	2.70	2.61	2.79	3.38	2.24	3.12
Tb	0.39	0.54	0.52	0.34	0.54	0.54	0.50	0.56	0.39	0.54
Dy	2.58	3.85	3.59	2.55	3.61	3.95	2.93	4.10	2.58	3.85
Ho	0.59	0.81	0.72	0.43	0.89	0.90	0.68	1.05	0.59	0.81
Er	1.65	1.87	2.51	1.29	1.88	2.09	2.09	2.81	1.65	1.87
Tm	0.21	0.28	0.33	0.20	0.31	0.32	0.29	0.38	0.21	0.28
Yb	1.10	1.63	1.76	1.15	1.62	1.93	1.68	2.31	1.10	1.63
Lu	0.23	0.26	0.26	0.16	0.27	0.37	0.23	0.39	0.23	0.26
Hf	0.92	0.84	0.67	0.70	0.52	0.79	0.48	1.07	0.92	0.84
Ta	0.01	0.01	0.01	0.01	0.01	0.01	0.01	0.01	0.01	0.01

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表 3 单斜辉石-熔体平衡温度、压力、深度及其与全岩之间Fe–Mg 分配系数表

Table 3. Temperature, pressure, depth of monoclinopyroxene melt equilibrium and Fe–Mg distribution coefficient with the whole rock

样品编号	P（kbar）	T（℃）	K_D（Fe-Mg）	深度（km）
CKS-08-01	3.2～5.8	1099～1184	0.289～0.298	10.50～19.29
CKS-08-02	2.8～5.6	1122～1194	0.292～0.296	9.36～18.52
CKS-08-04	2.1～6.4	1169～1242	0.293～0.299	7.07～21.05
CKS-08-06	1.5～5.6	1168～1193	0.275～0.282	4.79～18.33
注：按照1 GPa 相当于33 km 深度计算。

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内蒙朝克山辉长岩中单斜辉石矿物化学特征及地质意义

作者简介: 张永玲（1977−），女，硕士，副教授，主要从事水利工程研究。E−mail：zhangyl5266@163.com

通讯作者: 张治国（1991− )，男，博士，讲师，主要从事蛇绿岩及构造−岩浆作用研究。E−mail：zhangzhiguo1231@163.com。

Mineralogical Chemistry Characteristics and Geological Significance of the Clinopyroxene from Chaokeshan Gabbro, Inner Mongolia

Corresponding author: ZHANG Zhiguo, zhangzhiguo1231@163.cm

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