|本期目录/Table of Contents|

[1]梁厚鹏,付勇,徐志刚,等.中国锰银伴生矿床地质特征及成因[J].地球科学与环境学报,2017,39(02):194-213.
 LIANG Hou-peng,FU Yong,XU Zhi-gang,et al.Geological Characteristics and Origin of Manganese-silver Associated Deposits in China[J].Journal of Earth Sciences and Environment,2017,39(02):194-213.
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中国锰银伴生矿床地质特征及成因(PDF)
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《地球科学与环境学报》[ISSN:1672-6561/CN:61-1423/P]

卷:
第39卷
期数:
2017年第02期
页码:
194-213
栏目:
基础地质与矿产地质
出版日期:
2017-03-15

文章信息/Info

Title:
Geological Characteristics and Origin of Manganese-silver Associated Deposits in China
文章编号:
1672-6561(207)02-0194-20
作者:
梁厚鹏付勇徐志刚葛枝华魏帅超
1.贵州大学 资源与环境工程学院,贵州 贵阳  550025; 2.中国地质科学院矿产资源研究所,北京  100037
Author(s):
LIANG Hou-peng FU Yong XU Zhi-gang GE Zhi-hua WEI Shuai-chao
1. College of Resource and Environmental Engineering, Guizhou University, Guiyang 550025, Guizhou, China; 2. Institute of Mineral Resources, Chinese Academy of Geological Sciences, Beijing 100037, China
关键词:
锰银伴生矿床地质特征燕山期形成时代物质来源伴生关系成矿机制
Keywords:
manganese-silver associated deposit geological characteristic Yanshanian formation age material source associated relation metallogenic mechanism
分类号:
P618.32;P618.52
DOI:
-
文献标志码:
A
摘要:
锰银矿是一种Mn、Ag伴生的重要银矿资源类型,但长期以来并未受到矿床学家的重视。介绍了中国锰银伴生矿床的主要类型、地质特征、成矿时代及其与火山活动和构造之间的关系。根据矿床成矿元素组合关系,将中国锰银伴生矿床划分为4种类型:Mn-Ag型、Mn-Ag-Pb-Zn型、Fe-Mn-Ag-Pb-Zn型和Pb-Zn-Ag-(Mn)型。Mn-Ag型和Mn-Ag-Pb-Zn型锰银伴生矿床数量较多,锰矿规模以中小型为主,银矿规模以大中型为主;Fe-Mn-Ag-Pb-Zn型锰银伴生矿床数量较少,锰矿和银矿规模在湖南后江桥以大中型为主;而Pb-Zn-Ag-(Mn)型锰银伴生矿床仅有辽宁八家子,银矿规模达大型,锰矿规模较小。中国锰银伴生矿床主要形成于侏罗纪—早白垩世,与燕山期中酸性侵入和火山活动关系密切,矿床常产在岩体附近或火山岩中。区域上,锰银伴生矿床沿特定地层层位分布,受富Mn、富Ag矿源层控制;后期岩浆水与大气降水形成的混合热液萃取矿源层中的Mn、Ag等成矿物质;成矿热液沿断裂构造运移,使得矿区内锰、银矿体明显受区内断裂构造控制。根据典型矿床的硫、铅和氢氧同位素特征,锰银伴生矿床的成矿物质为深部岩浆与浅部物质的混合来源,且主要来源于深部岩浆物质,成矿热液也为岩浆水与大气降水的混合来源,只是不同矿床所占比例不同。此外,还探讨了Mn、Ag密切共生的原因及锰银伴生矿床的成矿机制。Mn2+可能是Ag+沉淀的重要还原剂,Mn2+被氧化形成MnO2,Ag+则被还原形成Ag,导致二者同时沉淀富集成矿,因此,可将锰帽作为寻找银矿化的良好标志。
Abstract:
Manganese-silver deposit, which is an important type of silver deposits with manganese-silver associated, has not been paid much attention. The main types, geological characteristics, mineralogenetic epoch and their relationships with volcanic activity and tectonic of manganese-silver associated deposits in China were introduced. On the basis of the intergrowth and associated combination, the manganese-silver associated deposits can be divided into four types: Mn-Ag, Mn-Ag-Pb-Zn, Fe-Mn-Ag-Pb-Zn and Pb-Zn-Ag-(Mn). Mn-Ag-type and Mn-Ag-Pb-Zn-type manganese-silver associated deposits are dominated; the scales of manganese deposits are often small and medium, while the scales of silver deposits are middle and large. The number of Fe-Mn-Ag-Pb-Zn-type manganese-silver associated deposits is less; the scales of manganese and silver deposits are middle or large in Houjiangqiao of Hunan. The Pb-Zn-Ag-(Mn)-type manganese-silver associated deposit is only Bajiazi; the scale of silver deposit is large, while the scale of manganese deposit is small. The formation ages of manganese-silver associated deposits in China are mainly in Jurassic-Early Cretaceous, which relates to intermediate-acidic intrusive and volcanic activities in Yanshanian; the deposits usually form near or in the volcanic rocks. The distribution of manganese-silver associated deposits is in some specific horizons under the control of Mn-rich and Ag-rich source beds; later magmatic water and meteoric water form a mixture of hydrothermal extraction of Mn and Ag ore-forming materials; these ore-forming hydrotherm migrates along fault, so that the Mn and Ag orebodies are obviously controlled by fault structure. According to the characteristics of S, Pb, H and O isotopes, the metallogenetic materials of manganese-silver associated deposits are from the mixture of hypomagma and shallow materials, and the hypomagma is dominated; the metallogenetic hydrotherm is also from the mixture of magmatic water and meteoric water, and just the ratios of the source materials are different for the deposits. In addition, the reason for Mn and Ag coexistence and the metallogenetic mechanism of manganese-silver associated deposit were discussed. The results show that Mn2+ is a significant reductant of the precipitation of Ag+, Mn2+ is oxidized to form MnO2, Ag+ is reduced to form Ag, which results in the precipitation of Mn and Ag at the same time; thus, manganese hat is a good marker indicating Ag mineralization.

参考文献/References:

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备注/Memo

备注/Memo:
收稿日期:2016-10-31
基金项目:中国地质调查局地质调查项目(DD20160346,1212011121037,12120114039601,1212 011220369)
作者简介:梁厚鹏(1993-),男,贵州遵义人,工学硕士研究生,E-mail:18300862334@163.com。
通讯作者:付 勇(1980-),男,四川广汉人,贵州大学副教授,理学博士,博士后,E-mail:byez1225@126.com。
更新日期/Last Update: 2017-03-31