Geochemical Characteristics of Lower Cambrian Black Rock Series in Northwestern Hunan Province , China
详细信息
- 责任者：You Xianjun (School of Geosciences and Environmental Engineering ; Central South University ; Changsha 410083 ; China) ; Dai Tagen
- 刊名：Geotectonica et Metallogenia
- 出版年：2009
- 卷期：33(2)
- 关键词：黑色岩系 ; black rock series ; 湖南 ; Hunan Province
- 页码：p.304-312
- 图表：6 illus., 4 tables, 18 refs.
- 分类号：0803
- issnNo：ISSN1001-1552
- isbnNo：CN44-1595/P
摘要
The study showed that the content of major elements SiO2 ranges from 10.54% to 87.10%, and the average is 51.15%. The total amounts of REE content has a large range, from 92.70 μg/g to 737.84 μg/g, average at 312.73 μg/g, LREE enrichment and HREE depletion, slightly to medially negative Ce anomaly. Most samples have weak positive Eu anomaly. The shale-normalized distribution patterns are hat-like type, and the curve is gentle inclined. The trace elements of Ni, Mo, Ba, V have high contents. The ore-bearing rock is phosphorite not carbonaceous shale. The result indicates that the Lower Cambrian black rock series in