Geochemical Anomaly at the Devonian/Carboniferous Boundary, Huangmao, Gnangxi, China

作     者：Chai Zhifang~①, Mao Xueying~①, Ma Shulan~①, Bai Shunliang~②,Zhou Yaoqi~①, Ma Jianguo~① and Ning Zhongshan~③ ①Institute of High Energy Physics, Academia Sinica, P. O. Box 2732, Beijing, China②Department of Geology, Beijing University, Beijing, China.③Guangxi Petroleum Exploration & Exploitation Co., Nanning, Guangxi. China. 

作者机构：BEIJING UNIVDEPT GEOLBEIJINGPEOPLES R CHINA GUANGXI PETR EXPLORAT CONANNINGPEOPLES R CHINA 

出 版 物：《Acta Geologica Sinica(English Edition)》 (地质学报（英文版）)

年 卷 期：1989年第63卷第3期

页      面：271-280页

核心收录：

学科分类：0709[理学-地质学] 081803[工学-地质工程] 07[理学] 08[工学] 0818[工学-地质资源与地质工程] 

主　　题：OCC Geochemical Anomaly at the Devonian/Carboniferous Boundary Gnangxi Huangmao China than 

摘      要：The abundances of nearly 40 elements, Ir included, have been measured using radio-chemical and instrumental neutron activation analysis (RNAA and INAA) across a Devonian/Carboniferous (D/C) boundary section at Huangmao, Guangxi, China. The Ir anomaly has been found in the D/C boundary bed. Its peak value is 156 ppt, richer by a factor of 12 than that in the underlying strata. Besides, as with Ir, other siderophile and chalcophile elements such as Au. Ni. Co. As and Sb are also enriched. The cause for the abundance anomalies of Ir and other elemets is discussed. Neither volcanic eruption nor extraterrestrial impact can explain it satisfactorily. The real mechanism for the anomalies awaits further study.