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Geochemical Characteristic of Rare Earth Element in Dazhuyuan Large-scale Bauxite Deposit of Guizhou Province and Its Significance(PDF)

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

Issue:
2012年第02期
Page:
31-40
Research Field:
基础地质与矿产地质
Publishing date:

Info

Title:
Geochemical Characteristic of Rare Earth Element in Dazhuyuan Large-scale Bauxite Deposit of Guizhou Province and Its Significance
Author(s):
LI Pei-gang1;  WANG Deng-hong2;  LEI Zhi-yuan1;  WENG Shen-fu1;  GAO Lan2
1. No.106 Geological Team, Bureau of Geology and Mineral Exploration and Development of Guizhou Province, Zunyi 563000, Guizhou, China; 2. Key Laboratory of Metallogeny and Mineral Assessment, Instituteof Mineral Resources, Chinese Academy of Geological Sciences, Beijing 100037, China
Keywords:
bauxite deposit;  rare earth element;  geochemistry;  ore genesis;  metallogenic process;  Dazhuyuan mining area;  Guizhou Province
PACS:
P595
DOI:
-
Abstract:
Dazhuyuan large-scale bauxite deposit is one of the most important deposits discovered in China recently. Based on the bauxite, allite and claystone samples collected from different positions of Liyuan Syncline in Dazhuyuan mining area, characteristics of rare earth element(REE)contents(mass fractions)and space distribution of the samples were analyzed, relationships of REE to bauxite quality and metallogenic process were explained, and the significances of REE contents to genesis and setting were discussed. The results showed that REE contents of bauxite, allite and claystone, which were 107.07×10-6, 185.00×10-6 and 246.28×10-6 without Y content, increased one by one, so the metallogenic process of bauxite consisted with the leaching of REE while Eu anomaly and Ce anomaly increased; compared with claystone, characteristics of bauxite were higher Eu anomaly and Ce anomaly; compared with heavy rare earth element(HREE), light rare earth element(LREE)of bauxite relatively enriched whether in the west or in the east of Liyuan Syncline, and LREE contents and the ratios of La and Yb contents increased with the decrease of depth; REE diagram was unsufficient to discriminate the source of metallogenic material, but generally showed that mineral-bearing system formed in marine facies or transitional facies setting; Dazhuyuan large-scale bauxite deposit, which was the same with other bauxite deposits in North Guizhou, generally belonged to sedimentary, and was related to paleo-karstification and ancient weathering process.

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Last Update: 2012-06-20