| 马振飞,卢智,谭敏.云南个旧矿区东区锡多金属矿床成矿温度与成矿空间研究[J].矿产勘查,2023,14(6):872-879 |
| 云南个旧矿区东区锡多金属矿床成矿温度与成矿空间研究 |
| The relationship betweenore forming temperatures and metallogenic space in Gejiu East Tin Field， Yunnan |
| 投稿时间：2022-04-11 修订日期：2023-05-20 |
| DOI：10.20008/j.kckc.202306005 |
| 中文关键词: 成矿温度 成矿预测 层间锡矿成矿空间 个旧 云南 |
| 英文关键词: ore-forming temperature metallogenic prognosis space for interlayer tin deposits Gejiu Yunnan |
| 基金项目:本文受云南省科技厅科技计划项目“锡铜层间矿赋矿层位研究”（202101BC070001-015）资助 |
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| 中文摘要: |
| 云南个旧矿区是中外驰名的超大型锡多金属矿集区，前人研究多集中于成矿温度对矿床成因的约束，对成矿温度控制矿床产出部位的研究较少。本文收集了个旧矿区东区457件矿物测温数据，梳理了不同类型矿物的形成温度和产出位置，以及网脉状锡矿床、层间锡矿床、接触带矽卡岩硫化物锡矿床、花岗岩内蚀变带锡矿床和花岗岩的对应关系。将成矿过程系统划分为早期矽卡岩-网脉状锡矿阶段、晚期矽卡岩-层间锡矿阶段、接触带矽卡岩硫化物锡矿阶段和花岗岩内蚀变带阶段锡矿4个成矿阶段，它们具有燕山同期异位的空间结构。恢复岩浆热液成矿空间以花岗岩顶面为基准，并参考了古地温梯度变化特征，推测在花岗岩顶面外侧存在一个有利的锡石结晶的温度带（成矿空间）。该成矿空间从花岗岩顶面向外侧可能始于垂向450 m，止于垂向高度1100 m，认为该成矿空间范围（450～1100 m垂向高度）为层间锡矿（氧化矿）最有利的找矿空间。 |
| 英文摘要: |
| Gejiu mining district in Yunnan is a world-renowned super-large tin-polymetallic deposit. Previous studies have focused on the constraints of ore-forming temperature on the genesis of the deposit， and there have been few studies on the control of ore-forming temperature on the location of mineral deposits formation. This paper collected 457 mineral temperature measurement data from the eastern part of the Gejiu mining district， sorted out the formation temperature and production location of different types of minerals， as well as the corresponding relationships between vein tin deposits， interlayer tin deposits， contact zone skarn sulfide tin deposits， granite alteration zone tin deposits， and granite. The ore-forming process was systematically divided into four stages： early skarn-vein tin deposits stage， late skarn - interlayer tin deposits stage， contact zone skarn sulfide tin deposits stage， and granite internal alteration zone tin deposits stage. They have a Yanshan synchronous and heterogeneous spatial structure. The ore-forming space of magmatic hydrothermal fluids was restored based on the granite top surface as the reference， and the characteristics of ancient geothermal gradient changes were also considered. It was inferred that there was a favorable temperature zone for tin ore crystallization outside the granite top surface （ore-forming space）. The ore-forming space may start from a vertical height of 450 meters and end at a vertical height of 1100 meters. It is believed that the range of the ore-forming space （vertical height of 450-1100 meters） is the most favorable prospecting space for interlayer tin deposits （oxide tin ores）. |
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