| 柴北缘阿日特克山铜钼矿床成矿岩体中黑云母和角闪石矿物学特征及其指示意义 |
| Received:April 11, 2022 Revised:March 06, 2023 点此下载全文 |
| 引用本文：TANG MingYing,DING ZhengJiang,PENG YongHe,CHEN Jian,ZHANG QiBin,ZHU Wei,ZHU HaiBo,MA DengXian,SUN XiaoLiang.2023.Mineralogical characteristics of hornblendes and biotites in ore-forming porphyry from Aritekeshan Cu-Mo deposit in northern Qaidam Basin and their significance[J].Mineral Deposits,42(2):253~266 |
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| Author Name | Affiliation | E-mail | | TANG MingYing | School of Resources and Environmental Engineering, Shandong University of Technology, Zibo 255000, Shandong, China
No. 8 Exploration Institute of Geology and Mineral Resources, Rizhao 276800, Shandong, China
Ministry of Natural Resources Technology Innovation Center for Deep Gold Resources Exploration and Mining, Engineering Laboratory of Deep Gold Exploration Big Data Application and Development, No. 6 Exploration Institute of Geology and Mineral Resources, Weihai 264209, Shandong, China | | | DING ZhengJiang | School of Resources and Environmental Engineering, Shandong University of Technology, Zibo 255000, Shandong, China
Ministry of Natural Resources Technology Innovation Center for Deep Gold Resources Exploration and Mining, Engineering Laboratory of Deep Gold Exploration Big Data Application and Development, No. 6 Exploration Institute of Geology and Mineral Resources, Weihai 264209, Shandong, China | ytdzhj@126.com | | PENG YongHe | No. 8 Exploration Institute of Geology and Mineral Resources, Rizhao 276800, Shandong, China
Key Laboratory of Non-ferrous Metals Mining and Resource Evaluation in Shandong Provincial Bureau of Geology and Mineral Resources, Rizhao 276800, Shandong, China | | | CHEN Jian | No. 8 Exploration Institute of Geology and Mineral Resources, Rizhao 276800, Shandong, China
Key Laboratory of Non-ferrous Metals Mining and Resource Evaluation in Shandong Provincial Bureau of Geology and Mineral Resources, Rizhao 276800, Shandong, China | | | ZHANG QiBin | Ministry of Natural Resources Technology Innovation Center for Deep Gold Resources Exploration and Mining, Engineering Laboratory of Deep Gold Exploration Big Data Application and Development, No. 6 Exploration Institute of Geology and Mineral Resources, Weihai 264209, Shandong, China | | | ZHU Wei | No. 8 Exploration Institute of Geology and Mineral Resources, Rizhao 276800, Shandong, China
Key Laboratory of Non-ferrous Metals Mining and Resource Evaluation in Shandong Provincial Bureau of Geology and Mineral Resources, Rizhao 276800, Shandong, China | | | ZHU HaiBo | No. 8 Exploration Institute of Geology and Mineral Resources, Rizhao 276800, Shandong, China
Key Laboratory of Non-ferrous Metals Mining and Resource Evaluation in Shandong Provincial Bureau of Geology and Mineral Resources, Rizhao 276800, Shandong, China | | | MA DengXian | No. 8 Exploration Institute of Geology and Mineral Resources, Rizhao 276800, Shandong, China
Key Laboratory of Non-ferrous Metals Mining and Resource Evaluation in Shandong Provincial Bureau of Geology and Mineral Resources, Rizhao 276800, Shandong, China | | | SUN XiaoLiang | No. 8 Exploration Institute of Geology and Mineral Resources, Rizhao 276800, Shandong, China
Key Laboratory of Non-ferrous Metals Mining and Resource Evaluation in Shandong Provincial Bureau of Geology and Mineral Resources, Rizhao 276800, Shandong, China | |
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| 基金项目:本文得到山东省深部金矿探测大数据应用开发工程实验室开放课题（编号：SDK202205）和山东省地矿局局控地质勘查与科技创新项目（编号：202013）联合资助 |
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| 中文摘要:阿日特克山铜钼矿床位于青海柴北缘成矿带中北部，为宗务隆构造带新发现的矽卡岩型-斑岩型矿床，矿床隐伏斑岩体中广泛发育黑云母，部分地段还发育角闪石。文章在野外地质工作的基础上，对花岗闪长（斑）岩进行了详细的岩相学研究和黑云母、角闪石成分的电子探针原位分析，初步探讨了成岩过程中的物理化学条件、成岩物质来源及其对成岩成矿的指示作用。电子探针结果显示，花岗闪长（斑）岩中黑云母主要为镁质黑云母，具有高Mg、Ti、K、Fe，低Ca、Na的特点；角闪石为镁质普通角闪石，表现为富Si、Mg、Ca，低Ti、Na、K的特征。黑云母和角闪石温度计算结果显示，花岗闪长（斑）岩中黑云母结晶温度为632~736℃（平均696℃），角闪石结晶温度为737~764℃（平均749℃）；在黑云母和角闪石同时存在的花岗闪长岩中计算的岩体侵位压力为81~180 MPa，深度为3.07~6.82 km，为中深成斑岩体。黑云母和角闪石矿物化学特征指示花岗闪长（斑）岩属于钙碱性岩系I型花岗岩，具有壳幔混源的特征。岩体中黑云母、角闪石具有较高的结晶温度，其结晶的岩浆具有高的氧逸度及水含量，显示良好的成矿性，指示该地区具有寻找大型斑岩矿床的潜力。 |
| 中文关键词:地质学 角闪石 黑云母 矿物学特征 阿日特克山铜钼矿床 柴北缘 |
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| Mineralogical characteristics of hornblendes and biotites in ore-forming porphyry from Aritekeshan Cu-Mo deposit in northern Qaidam Basin and their significance |
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| Abstract:The Aritekeshan Cu-Mo deposit is located in the central part of the northern margin of Qaidam Metallogenic belt, Qinghai Province. It is a newly-identified skarn-porphyry deposit in the Zongwulong tectonic belt. In this paper, based on the detailed geological work in the field, the petrographic study of the granodiorite (porphyry) and the in-situ electron probe micro analysis (EPMA) of biotite and hornblende are carried out, and the physical and chemical conditions during magma emplacement, the source of rock-forming materials and their indication to mineralization are discussed. The EPMA results show that the biotite in granodiorite is mainly magnesium biotite with high Mg, Ti, K, Fe and low Ca, Na. The amphibole belongs to magnesium hornblende that is rich in Si, Mg, Ca and low in Ti, Na, K. The estimated results of biotite and hornblende thermometers show that biotite and hornblende in granodiorite crystallized at 632~736℃ (average 696℃) and 737~764℃ (average 749℃), respectively. The calculated emplacement pressure of the granodiorite from biotite and hornblende barometers is 81~180 MPa, equivalent to a depth of 3.07~6.82 km, indicating that the granodiorite formed at a medium-deep depth. The chemical characteristics of biotite and hornblende indicate that the granodiorite belongs to calc-alkaline I-type granite, which potentially reflected a crust-mantle interaction process. The biotite and hornblende geochemical analysis data in the ore-forming porphyry show good mineralization condition, including high mineralization temperature, high oxygen fugacity and water abundance, which indicate that the area might have prospecting potential for large-size porphyry deposits. |
| keywords:geology hornblende biotite mineralogical characteristics Aritekeshan Cu-Mo deposit northern Qaidam Basin |
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