The Characteristics of Alkali Feldspar Granite in Limu W-Sn Deposit, Guangxi Province
详细信息
- 责任者：Wang Yanli (China University of Geoseiences ; Beijing 100083 ; China) ; Zhu Xinyou
- 刊名：Geology and Mineral Resources of South China
- 出版年：2013
- 卷期：29(1)
- 关键词：锡矿 ; tin ores ; 稀有矿床 ; rare element deposit ; 碱长花岗岩 ; alkali feldspar granite ; 广西 ; Guangxi Province
- 页码：p.12-18
- 图表：illus., 1 table, 26 refs.
- 分类号：1001
- issnNo：ISSN1007-3701
- isbnNo：CN42-1417/P
摘要
The granites in Limu tungsten （tin） deposit are named medium-grained porphyritic ferri-muscovite granite or albite granite. The electron microprobe analyzing show that all the albite in Limu granite with An〈5, and more than 95 % samples with value of 〈2. The mineral crystallization sequence is albite →K-feldspar ＋ quartz →topaz→mica. The albite is not fromed by albitization but the earliest product of magma crystallization. In the QAP figure , the two kind granites are all belong to alkali-feldspar granite, as thus, they exactly names are medium-grained porphyritic ferri-museovite alkali-feldspar granite （ I ） and fine-grained alkali-feldspar granite （ II ）.