|Table of Contents|

Multistage Mineralization of Chedu Magnetite Quartzite Gold Deposit in Mianluening Block of Shaanxi, China(PDF)

《地球科学与环境学报》[ISSN:1672-6561/CN:61-1423/P]

Issue:
2020年第03期
Page:
355-365
Research Field:
基础地质与矿产地质
Publishing date:

Info

Title:
Multistage Mineralization of Chedu Magnetite Quartzite Gold Deposit in Mianluening Block of Shaanxi, China
Author(s):
ZHANG Gao-xin1 LIU Jian-chao1 ZHANG Hai-dong1* WANG De-quan2 JI Dong-ping2 LI Zhen1 ZHANG Yan-na1
(1. School of Earth Science and Resources, Chang'an University, Xi'an 710054, Shaanxi, China; 2. Sino Shaanxi Nuclear Industry Group 214 Brigade Co., Ltd., Xi'an 710054, Shaanxi, China)
Keywords:
gold deposit magnetite quartzite banded structure occurrence state mineralization stage supergenesis Mianluening block Shaanxi
PACS:
P611; P616
DOI:
10.19814/j.jese.2020.03036
Abstract:
Based on the field investigation and mineragraphy, the mineralization stages were identified for Chedu gold deposit in Mianluening block of Shaanxi. According to the metamorphic degree of rock(ore)and crosscutting relationship of minerals, the mineralization can be divided into three stages: ① sedimentary-metamorphic stage, high-grade layered gold ore body formed is accompanied by the sedimentation-metamorphism of magnetite quartzite; ② hydrothermal mineralization stage, is divided into two substages, including smoky gray quartz sulfide vein and sulphide-bearing carbonate vein, in which native golds are observed; ③ supergenesis stage, gold is further enriched to form large native gold grains accompanied by oxidization of magnetite. The native gold in Chedu gold deposit occurs as magnetite fractures, along the grain boundaries of magnetite and quartz, and within magnetite, pyrite, and calcite. The main occurrence states of gold in Chedu gold deposit are intergranular gold, inclusion gold and fissure gold. Based on high-grade gold and distribution scale in quartz sulfide veins and sedimentary bands of magnetite quartzite, the genesis of Chedu gold deposit is classified as magnetite quartzite type, which is of great significance for the next geological prospecting in the area.

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Last Update: 2020-05-27