Petrochemical Research on Intermediate-Basic Dykerocks in Xiaoqinling, Xiong’ershan Gold Field, Henan Province, Central China
详细信息
- 责任者：Wang Tuanhua (Institute of Mineral Resource ; Chinese Academy of Geology Sciences ; Beijing 100037 ; China) ; Mao Jingwen
- 刊名：Earth Science Frontiers
- 出版年：2008
- 卷期：15(1)
- 关键词：辉绿岩 ; diabase ; 煌斑岩 ; lamprophyres ; 河南 ; Henan Province
- 页码：p.250-266
- 图表：9 illus., 4 tables, 40 refs.
- 分类号：0801
- issnNo：ISSN1005-2321
- isbnNo：CN11-3370/P
摘要
By comprehensive study on geology, petrology and geochemistry of dykerocks in the Xiaoqinling and Xiong’ershan area, we identified the main dykerocks as intermediate-basic rocks, including diabases and lamprophyres. Through our study, we suggest that the magmas evolution relevant to the formation of the dykerocks may be divided into three stages: 1) in the early Mesozoic, fluids and melts with high potassium and silicon had undergone matasomatism with lithospheric mantle in upper mantle source in the Qinling orogenic belt, leading to the formation of basaltic magmas with enriched mantle characteristics; 2) the basaltic magmas mixed with granitic magmas formed by regional thermal effect; 3) the mixed magmas ascended through continental crust, and underwent crystallization, differentiation, assimilation and continued evolution by thermodynamic and dynamic mechanisms.