湖南崇阳坪地区石英脉型钨矿床的地质特征、成矿规律及成矿模式

发布时间：2018-12-14 22:59

【摘要】：崇阳坪地区位于南岭西段,区内出露有中华山、崇阳坪、瓦屋塘3个岩体,且在岩体内已发现了初具规模的寨溪山、上茶山、牛角界、沙溪等钨矿床,主要矿化形式为浸染状、细脉状白钨矿、黑钨矿化,常见围岩蚀变有云英岩化、钾长石化、钠长石化、电气石化、绿泥石化等,属于石英脉型钨矿床(主要为白钨矿)。区内崇阳坪岩体LAICP-MS锆石U_Pb年龄为(214.2±1.7)Ma,瓦屋塘岩体年龄为(223.1±2.1)Ma,形成于印支期,研究区内的钨矿(化)体均产于印支期花岗岩体接触带上,空间上与二长花岗岩侵入体关系密切,成矿与成岩基本同时,这填补了华南地区印支期花岗岩不能形成独立钨矿的空白。文章在总结归纳前人研究成果的基础上,结合近年来在该区找矿取得的进展,主要从以上矿床的地质特征入手,总结分析该区钨矿床的成矿规律,并在此基础上初步建立该区石英脉型钨矿床成矿模型。
[Abstract]:The Chongyangping area is located in the western section of Nanling. There are three intrusions in the area, such as Zhonghua Mountain, Chongyangping, Wawutang, and the initial scale tungsten deposits such as Zhaoxishan, Upper Chashan, Niujiajie and Shaxi have been found in the rock body. The main mineralization forms are dyed. Thin-vein scheelite, wolframite mineralization, alteration of common surrounding rock, such as quartz, potassium feldspar, albite, electric petrochemical, green mud, etc., belong to quartz vein type tungsten deposit (mainly scheelite). The LAICP-MS zircon U_Pb age of the Chongyangping pluton is (214.2 卤1.7) Ma, Wawutang age is (223.1 卤2.1) Ma, formed during the Indosinian period, and the tungsten ore (mineralization) bodies in the study area all occur in the contact zone of the Indosinian granite body. The space is closely related to the intrusive body of the monzogranite, and the mineralization and diagenesis are basically at the same time, which fills the gap that the Indosinian granites in South China could not form independent tungsten ore. On the basis of summing up the previous research results and combining the progress made in prospecting in this area in recent years, this paper summarizes and analyzes the metallogenic regularity of tungsten deposits in this area from the geological characteristics of the above deposits. On the basis of this, the metallogenic model of quartz vein tungsten deposit in this area is preliminarily established.
【作者单位】：湖南省地质矿产勘查开发局四七队;中国地质科学院矿产资源研究所国土资源部成矿作用与资源评价重点实验室;
【分类号】：P618.67

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