[1]郭锐.2009.粤东嵩溪银矿形成的区域地质背景、成矿特征及成因.大地构造与成矿学,33(4):567-587.
 GUO Rui,and PENG Ensheng.2009.Regional Geological Background, OreForming Characters and Metallogeny of Songxi Silver Deposit, East Guangdong.Geotectonica et Metallogenia,33(4):567-587.
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粤东嵩溪银矿形成的区域地质背景、成矿特征及成因
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《大地构造与成矿学》[ISSN:ISSN 1001-1552/CN:CN 44-1595/P]

卷:
期数:
2009年33卷04期
页码:
567-587
栏目:
构造地质与成矿学
出版日期:
2009-12-25

文章信息/Info

Title:
Regional Geological Background, OreForming Characters and Metallogeny of Songxi Silver Deposit, East Guangdong
作者:
郭锐1 2彭恩生1
1.中南大学资源与环境学院,湖南 长沙 410083; 2.广东省有色金属地质局,广东 广州 510080
Author(s):
GUO Rui12 and PENG Ensheng1
1.School of Resources and Environmental Sciences, Central South University, Changsha 410083, Hunan, China; 2.Nonferrous Metal Exploration Bureau of Guangdong Province, Guangzhou 510080, Guangdong, China
关键词:
成矿特征火山作用银矿嵩溪粤东
Keywords:
metallogenyvolcanismlate Jurassicsilver depositSongxiGuangdong
分类号:
P618.5
文献标志码:
A
摘要:
嵩溪银矿位于粤东晚古生代梅县-惠阳坳陷带的北段,晚侏罗世陆相火山岩盆地的边缘。区域成矿地质背景研究表明,晚侏罗世是粤东构造岩浆活动最强烈时期,火山岩的原始成岩物质来源于下地壳。地质勘探表明矿体在空间上呈脉状分布于早、中侏罗世的地层中,受断裂构造控制,矿石的结构构造和蚀变的分带性说明矿床具典型的热液矿床特征。矿石的铅同位素组成具壳幔混合铅特征,成矿物质来源于深部岩浆;矿石硫同位素组成和与成矿有关的石英脉的氢氧同位素、方解石脉的碳同位素组成特征,说明成矿热液以岩浆热液为主。根据矿床的矿化蚀变特征和成矿物质、成矿热液来源,结合区域成矿地质背景、矿区周边岩浆岩分布特征和岩浆岩成份及其来源的综合分析,认为嵩溪大型银矿床的形成与晚侏罗世陆相火山作用有关,矿床成因类型为陆相火山岩浆期后热液脉状矿床。
Abstract:
The Songxi silver deposit is located in the north segment of the late Paleozoic MeixianHuiyang depression zone in the East Guangdong, at the margin of the late Jurassic terrestrial volcanogenic basins. There are two large scale silver polymetallic deposits as well as many ore spots in the east Guangdong, which is a metallogenic province of nonferrous metals and silver. A study on the metallogeny of the deposit from regional geology is helpful for the recognition of metallogenic characters and ore exploration in the area. The regional metallogenic geological background shows that tectonic and magmatic activities in the east Guangdong are most intense in late Jurassic. Many terrestrial volcanic eruption basins are distributed along an deep fault zone. The rockforming substances of the volcanic rocks were originated from the lower crust. The geological exploration has shown that the vein orebodies controlled by faults occur between the lower and the middle Jurassic. The textures and structures of the ores as well as the alteration zoning indicate that it is a typical hydrothermal deposit. The Pb isotopic composition is of mixture lead of both the crust and the mantle, showing that the oreforming substances should be originated from deep magma. The S isotopic compositions of the ores, HO isotopes of the oreforming vein quartz and the C isotopic compositions of the vein calcite indicate that the oreforming fluid is mainly originated from magma. Based on the mineralization and alteration characters, origins of the oreforming substances and oreforming fluid, combined with the regional metallogenic geological background, the magmatic distribution and magmatic composition, it is proposed in the paper that the deposit is closely related with the late Jurassic terrestrial facies volcanism, belonging to the terrestrial facies volcanogenic postmagmatic hydrothermal deposit.

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备注/Memo

备注/Memo:
收稿日期: 2008-10-26; 改回日期:2009-03-24第一作者简介:郭锐(1964-),男,在读博士生,教授级高工,主要从事区域地质矿产调查. Email: lyguorui@21cn.com
更新日期/Last Update: 2009-11-15