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Geological and Geochemical Evidence of the Erlihe SEDEX Pb-Zn Deposit in Fengxian, Shaanxi(PDF)

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

Issue:
2011年第01期
Page:
64-69
Research Field:
基础地质与矿产地质
Publishing date:

Info

Title:
Geological and Geochemical Evidence of the Erlihe SEDEX Pb-Zn Deposit in Fengxian, Shaanxi
Author(s):
ZHANG Hai1; HE Ming-you1; LI Fang-lin2; WANG Yu-ting1; TANG Yao1; HOU Chun-qiu1
1. School of Applied Nuclear Technology and Automation Engineering, Chengdu University of Technology, Chengdu 610059,Sichuan, China; 2. School of Earth Sciences, China University of Geosciences, Wuhan 430074, Hubei, China
Keywords:
fluid inclusion;  rare earth element;  isotope;  geochemical characteristic;  SEDEX;  hydrothermal deposit;  Erlihe Pb-Zn Deposit
PACS:
P611
DOI:
-
Abstract:
Based on the geologic survey and sampling test, characteristics of the typomorphic mineral trace element, wall rock rare earth elements geochemistry and fluid inclusion for Erlihe Pb-Zn Deposit were analyzed. The results showed that the Erlihe Pb-Zn Deposit had the general geological features of a submarine exhalative sedimentary deposit; the multi-phase tectonic movement of the Indo-Variscan period and the large-scale development of fractured surface provided a favorable structural condition for mineralization by erupting and aggregating a large number of minerals. Characteristics of the typomorphic mineral trace element showed that sphalerite was rich in Cd((6 493.74-7 225.68)×10-6)and poor in Sb and As, pyrite w(S)/w(Se)and w(Co)/w(Ni)were 23 443.48-250 284.36 and 3.47-104.10 respectively, the deposit was hot brine sedimentary; pyrite w(Fe)/(w(S)+w(As))(0.87-1.52)suggested the deposit originated from shallow; characteristics of fluid inclusions and rare earth elements(dramatically depleted in Eu and Ce in wall rock and sphalerite)probably hint distal mineralization of SEDEX in medium temperature; log(δCe)(-0.04-0.04)displays an anoxic environment for wall rock diagenesis; the homogeneous temperature of quartz fluid inclusion and temperature interval of sphalerite components(215 ℃-333 ℃)showed the deposit was in medium temperature. In general, Erlihe Pb-Zn Deposit is possibly a type of superficial medium temperature strata-bound SEDEX deposit, relatively far away from the vent.

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Last Update: 2011-03-20