| 河北丰宁营房铅锌银矿床银的赋存状态及富集规律 |
| |
| 引用本文： | 任耀武,曹倩雯.河北丰宁营房铅锌银矿床银的赋存状态及富集规律[J].华北地质矿产杂志,1995,10(1):77-86. |
| |
| 作者姓名： | 任耀武 曹倩雯 |
| |
| 作者单位： | 华北有色地质勘查局地质研究所 |
| |
| 摘 要： | 河北丰宁营房铅锌银矿床产于－近南北向的中型韧性剪切带中。矿体定位于燕山早期粗粒钾长花岗岩与下元古界红旗营子群地层构造接触带中，矿体埋藏浅，厚度大，品位高，已构成铅锌银共生矿床。主要银矿物有银黝铜矿、辉银矿、螺状硫银矿、浓红银矿及自然银等，银主要以单矿物形式赋存于方铅矿及闪锌矿中，少量存在于脉石中，极不量以类质同像或次显微包体形式存在于硫化物和硫盐矿物中，银的富集主要与方铅矿、闪锌矿及黄铁矿关系密切
|
| 关 键 词： | 矿源层 铅锌银矿床 赋存状态 富集规律 |
Occurrence State and Enrichment Rule of Ag in Pb-Zn-Ag Deposit of Fengning Yingfang,Hebei Province |
| |
| Authors: | Ren Yaowu Cao Qianwen |
| |
| Abstract: | Yingfang Pb-Zn-Ag deposit lies in a S-N direction medium ductile shear zone,its mainore body occurs in the contact zone between coarse Or-granite of early Yanshanian andHongqiyingzi Group of Lower Proterozoic.With shallow burial,big thickness,high grade andeasy dressing,it is a minable Pb-Zn-Ag associated deposit.The main Ag minerals are as follows:Ag-tetrahedrite,argentite,acanthite,pyrargyriteand native silver.Silver bearing minerals are mainly simple and occur in galena and spha-lerite,minorly in gangue minerals,very little in sulphide and sulfate minerals as isomor-phisms and submicro inclusions.The enrichment of Ag has generally close relation with gale-na and sphalerite,but the simple type of pyrite,or pyrite dominating over galena and spha-lerite,Ag mineralizations are weak.In the region,Ag mineralization is also normally correlat-ed with mylonite,silication and sericitization.Through preliminary study,the author considers that the counting rocks of HongqiyingziGroup are the source beds,granite intrusion only provides the thermal source.During myloni-tization in ductile shear zone the source rocks are suffered metamorphic differentiation,acti-vation,migration and resulted in the formation of ore deposits.So,the deposit belongs to thetype of metamorphic(thermal fluid)differentiation or ductile shear mylonite. |
| |
| Keywords: | source bed Hongqiyingzi Group ductile shear zone Pb-Zn-Ag deposit Yingfang of Hebei |
| 本文献已被 CNKI 维普 等数据库收录！ |
|
