Element Geochemistry and Genesis of Early Paleozoic Granite in Yingchengzi Gold Field, Eastern Zhangguangcai Mountains
详细信息
- 责任者：Chen Xingshi (College of Earth Sciences ; Jilin University ; Changchun 130061 ; China) ; Zhang Peng
- 刊名：Journal of Jilin University
- 出版年：2011
- 卷期：41(2)
- 关键词：花岗岩 ; granite ; 张广才岭 ; Zhangguangcai Mountains
- 页码：p.440-447
- 图表：6 illus., 1 table, 24 refs.
- 分类号：0801
- 出版序号：20120137
- issnNo：ISSN1671-5888
- isbnNo：CN22-1343/P
摘要
DivSummary name="EnDivSummary">Geology, petrography and element geochemistry for granites are studed from Yingchengzi goldfield, eastern Zhangguangcai Mountains. The granites are characterized by high SiO2(SiO2=71.12%~75.66%), high fractionated index (DI=90.53~94.42), and belong to Potassic calc-alkaline rock (σ=2.37~3.94). They are enriched in LILE (LREE/HREE=11.20~14.62, ω(Rb)=(270.6-~165.3)×10-6, Na2O/K2O =0.18~0.67) and depleted in Ba, Nb, Sr, P and Ti, as well as negative Eu anomalys. These characteristics indicate that the granites belong to metaluminous and highly fractionated I-type granites, whose parent magma may be I-type granitic magma, and the magma for the granites is formed after fractional crystallization for parent magma dominated by plagioclase.
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