| 四川大渡河流域偏岩子金矿床地质特征及金的赋存状态 |
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| 引用本文： | 张燕,李引,尹鑫,陈翠华,王嘉欣,杨玉龙,邹发.四川大渡河流域偏岩子金矿床地质特征及金的赋存状态[J].矿产综合利用,2022,0(1):49-55. |
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| 作者姓名： | 张燕 李引 尹鑫 陈翠华 王嘉欣 杨玉龙 邹发 |
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| 作者单位： | 1.成都理工大学地球科学学院, 四川 成都 610059 |
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| 基金项目： | 四川省教育厅科技计划项目《大渡河流域战略资源碲的工艺矿物学研究》（2018JY0477）；;国家自然科学基金项目《热流体作用及其铅锌成矿和油气成藏效应——以四川盆地震旦系富有机质碳酸盐岩型铅锌矿床为例》（41372093）共同资助； |
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| 摘 要： | 偏岩子金矿床位于康滇地轴北端的大渡河成矿带上，是世界上稀有的氟镁石型金矿床。产于上震旦统灯影组中，矿物的组成比较丰富，已查明的矿物多达50多种。矿石类型以氟镁石-石英型为主，矿体同时受到地层和构造的双重控制。通过电子探针（EPMA）、扫描电镜（SEM）等测试，发现载金矿物以氟镁石、黄铁矿、黝铜矿等矿物为主；按照金的化学状态可将金的赋存状态分为独立矿物、络合物和晶格金这三大类，按照金与载体矿物之间的嵌布关系可分为有包裹金、裂隙金和晶隙金这三大类，金的粒度跨度较大，主要集中在2～10 μm，属于明金、显微金。
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| 关 键 词： | 大渡河流域 偏岩子金矿床 载金矿物 赋存形式 |
| 收稿时间： | 2020-03-12 |
Geological Characteristics and Occurrence of Pianyanzi Au Deposit in Daduhe Basin,Sichuan |
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| Affiliation: | 1.College of Earth Sciences, Chengdu University of Technology, Chengdu, Sichuan, China2.Bureau of Industry and Information Technology, Fuquan City, Qiannan Prefecture, Guizhou Province, Fuquan, Guizhou, China |
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| Abstract: | Pianyanzi gold deposit is located in the Daduhe metallogenic belt at the northern end of the Kangyan-Yunnan axis. It is a rare flummagnesite type gold deposit in the world. Produced in the upper sinian dengying formation, the mineral composition is relatively rich, up to 50 kinds of minerals have been identified. The ore type is mainly flummagnesite-quartz type, and the ore body is controlled by both strata and structure. By means of EPMA and SEM, it is found that the gold minerals are mainly fluobesite, pyrite, tetrahedrite and so on. According to the chemical state of gold, the occurrence state of gold can be divided into three categories: independent minerals, complex complexes and lattice gold. According to the distribution relationship between gold and carrier minerals, it can be divided into three categories: encapsulated gold, fissure gold and intergranular gold. The granularity of gold has a large span, mainly concentrated in 2 ~ 10 μm, and belongs to the crystallized gold and microscopic gold. |
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