锡矿山锑矿田Ⅳ号矿体控矿因素分析

2021-01-15 12:24:40唐代文,韦俊杰,赵志坚,邹利群,肖亮明
国土资源导刊 2021年4期

唐代文,韦俊杰,赵志坚,邹利群,肖亮明

摘 要 锡矿山锑矿田位于多组构造体系的复合部位,是世界级超大型锑矿床,历经120余年的开采,保有资源量日益减少。近年来,在棋梓桥组地层中,发现了Ⅳ号矿体,探获资源量达到中型,远景资源量尚未查清。为指导矿田深边部找矿工作,通过野外观察、地质编录,讨论Ⅳ号矿体的控矿因素,发现矿体的形成受岩相古地理、地层、构造联合控制,其中构造是控制矿体的主导因素。

关键词 锡矿山锑矿田;棋梓桥组;Ⅳ号矿体;控矿因素;构造

中图分类号:P612 文献标识码:A

Analysis on Ore Controlling Factors of No.Ⅳ Orebody in Xikuangshan Antimony Ore Field

Tang Daiwen1 , Wei Junjie1 , Zhao Zhijian1 , Zou Liqun2 , Xiao Liangming2

(1.The Second Team of Hunan Nonferrous Metals Geological Exploration Bureau, Xiangtan Hunan 411101;

2.Hsikwangshan Twinkling Star Co.,Ltd, Lengshuijiang Hunan 417500)

Abstract: Xikuangshan antimony ore field is located in the compound position of multiple tectonic systems, which is a world-class super-large antimony deposit. After more than 120 years of mining, the retained resources are decreasing. In recent years, No.Ⅳ  ore body has been discovered in Qiziqiao Formation, and the prospecting resources have reached medium size, but the prospective resources have not been found out yet. In order to guide the prospecting work in the deep edge of the ore field, the ore-controlling factors of No.Ⅳ  ore body were discussed through field observation and geological cataloging. It is shown that the formation of orebody is controlled jointly by lithofacies palaeogeography, stratum and structure, among which structure is the dominant factor.

Keywords: Xikuangshan antimony ore field; Qiziqiao formation; ore body No. Ⅳ; ore controlling factors; structure

錫矿山锑矿是世界级超大型锑矿床,素有“世界锑都”的美称,自1897年开采以来,保有资源量日趋减少,为延续矿山生产,寻找接替资源迫刻不容缓[1-2]。近年来,在矿田范围内实施了中央和省级财政地勘项目,但研究的重点停留在浅部,认为F75断层是控矿构造,与其下盘的次级断裂控制锑矿的产出[1],但是人们对断裂深部的特征及控矿关系未作研究。同时,对F75下盘顺断层产出而不受层位控制的矿体统称为“带状矿体”[2]。近年来,在棋梓桥组地层中,发现了Ⅳ号矿体,建立了构造分层控矿模式[3]。由于控矿因素认识不足,导致钻孔效果欠佳,矿田深边部找矿工作缓慢。通过加强Ⅳ号矿体控矿因素研究,圈定找矿远景区,然后施工钻孔成功验证,取得了找矿突破。

本文以钻孔揭露的矿体为研究对象,通过野外观察、地质编录,讨论Ⅳ号矿体的控矿因素,对明确矿田深边部找矿方向具有重要意义。……

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