Facies Sequence Reestablishment and Metallogenic Analysis of Middle Triassic Anisian Meta-Volcanic Rocks in the Kafang Ore District, Gejiu, Yunnan Province
详细信息
- 责任者：Zhang Hai (School of Earth Sciences and Resources ; China University of Geosciences ; Beijing 100083 ; China) ; Fang Weixuan
- 刊名：Geology in China
- 出版年：2009
- 卷期：36(6)
- 关键词：变火山岩 ; metavolcanic rocks ; 云南 ; Yunnan Province
- 页码：p.1322-1330
- 图表：4 illus., 2 tables, 28 refs.
- 分类号：0802
- issnNo：ISSN1000-3657
- isbnNo：CN11-1167/P
摘要
The Middle Triassic Anisian meta-volcanic rocks in Kafang Member of Gejiu Formation could be restored into a set of alkaline basic-ultrabasic rock assemblages. The restored volcanic and sedimentary lithofacies includes explosive facies, effusive facies, volcanic sedimentary facies, tidal flat facies, late-basin-fluid superimposed facies and skarn facies. The characteristics of the vertical phase sequence indicate multi-stages of volcanic activities and variation of volcanic activities from strong to weak. Late-basin-fluid superimposed facies and skarn facies can be regarded as ore-bearing lithofacies and an ore-prospecting index in future.