| 丁兆滨,张勇,张培青,李泽峰,刘国燕,赵永亮.东昆仑库德尔特金矿床特征及金的赋存状态研究[J].矿产勘查,2024,15(4):578-587 |
| 东昆仑库德尔特金矿床特征及金的赋存状态研究 |
| Study on the characteristics and occurrence state of gold in Kudeerte gold deposit， easten Kunlun |
| 投稿时间：2022-03-19 修订日期：2022-09-03 |
| DOI：10.20008/j.kckc.202404008 |
| 中文关键词: 金赋存状态 地质特征 扫描电镜 矿床成因 库德尔特 东昆仑 |
| 英文关键词: occurrence state geological characteristics scanning electron microscopy genesis of deposit Kudeerte easten Kunlun |
| 基金项目:本文受青海省科技项目“青海省东昆仑地区榴辉岩与成矿耦合关系研究”（青地矿科［2021］61号）、“柴周缘钴镍成矿规律及靶区优选”（青地矿科［2023］50号）和“东昆仑西段金矿成矿规律及找矿突破（2019-ZJ-7009）”联合资助。 |
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| 中文摘要: |
| 库德尔特金矿床是近几年在东昆仑新发现的一处中型金矿床，共圈定金矿体13条，长25~300 m，平均厚度0.84~17.27 m，矿体形态复杂，呈脉状、透镜状、囊状，矿石矿物主要有黄铁矿、毒砂、自然金、闪锌矿、方铅矿等。由于矿床工作程度较低，仅个别学者对金矿成因进行了初步探讨，对金的赋存状态研究更是未涉及到。库德尔特新发现的独立金矿体，具有独特的成矿特征和重要的找矿指示意义，厘清矿床成因和金的赋存状态，对矿床今后的勘查工作及矿石选冶具有现实意义。鉴于此，本文运用电子显微镜、扫描电镜等分析手段和方法，对矿石矿物特征及金的赋存状态进行了研究，并探讨了矿床成因。研究结果表明，库德尔特金矿石主要可分为铅锌银金复合金矿石和独立金矿石两类，两者金矿物均为自然金，赋存状态均以粒间金为主，含少量裂隙金，载金矿物主要为黄铁矿，自然金的粒度以微、细粒金为主，粒径多为3~20 μm。根据矿石特征、金的赋存形态，结合前人流体包裹体研究成果，综合分析认为：库德尔特独立金矿的成因类型为岩浆热液型，铅锌银金矿的成因类型为矽卡岩型，他们同属于与中三叠世花岗闪长岩活动有关的矽卡岩型-热液型Cu-Mo-Pb-Zn-Au-Ag成矿系列。 |
| 英文摘要: |
| The Kudeerte gold deposit is a medium-sized gold deposit that was discovered in the western sector of easten Kunlun in recent years. A total of 13 gold ore bodies are delineated， with a length of 25-300 m and an average thickness of 0.84-17.27 m. The ore body is complex in shape， vein， lens and sac. It has the characteristics of branching and recombination， expansion and contraction， pinch out and reproduction.The main ore minerals are pyrite， arsenopyrite， natural gold， sphalerite， and galena. Due to the low level of ore deposit work， only a few scholars have conducted preliminary discussions on the genesis of gold deposits， and the research on the occurrence state of gold has not been involved. The newly discovered independent gold ore body in Kudeerte has unique metallogenic characteristics and important prospecting significance. Clarifying the genesis of the deposit and the occurrence state of gold has practical significance for the future exploration and ore-processing. In view of this， the mineral characteristics and occurrence state of gold in ore are studied by means of electron microscope and scanning electron microscope， and the genesis of the deposit is discussed. The results show that the gold mineral in kudert gold ore is mainly natural gold， the occurrence state is mainly intergranular gold， a small amount of fissure gold， the gold carrying minerals are mainly pyrite and quartz， the particle size of natural gold is mainly micro and fine gold， and the particle size is mostly 3-20 μm. According to the characteristics of the ore， the occurrence form of gold， and combined with the previous research results of fluid inclusions， the comprehensive analysis shows that the genetic type of kudeerte independent gold deposit is magmatic hydrothermal type， and the genetic type of Pb-Zn-Ag-Au deposit is skarn type， which both belong to the Skarn-hydrothermal type Cu-Mo-Pb-Zn-Au-Ag metallogenic series related to the middle Triassic granodiorite activity. |
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