地质与勘探2018，Vol.54Issue(1)：90-101,12.
皖北宿州地区寒武系豹皮灰岩地球化学特征及其地质意义
Geochemical Characteristics of the Cambrian Leopard Limestone in the Suzhou Area, Northern Anhui Province and its Geological Implications
摘要
Abstract
The purpose of this work was to understand the geochemical characteristics of the leopard limestone of Cambrian in the Suzhou area and its geological implications. This rock in the study area was identified and its major elements and trace elements were geochemically analyzed. The results show that the content of Ti,and values of Er/Nd and Y/Ho of this rock are all low,suggesting the influence of land-source clastics during its formation process. The elements U, Pb,Sr,and Sm are rich, while Ba, Nd, Ce, Pr, and Zr are depleted. The total REE in this limestone is 3.07 ×10 -6~7.00×10 -6(5.53×10 -6on average),lower than the typical value of marine limestone. The content of V is low,and the ratio of V/Cr is between 1. 02 and 1.73, indicating that this limestone formed in an oxidation environment. Its high Sr/Ba anomaly implies marine sediments under a highly salted condition, while the Sr/Cu value means a dry climate during that time. It is inferred that this leopard limestone of the study area should form in a limited carbonate platform.关键词
地球化学特征/豹皮灰岩/寒武系/皖北/宿州Key words
geochemical characteristics/leopard limestone/Cambrian/northern Anhui Province/Suzhou分类
天文与地球科学引用本文复制引用
吴灿灿,陈松,李俊,郭锤..皖北宿州地区寒武系豹皮灰岩地球化学特征及其地质意义[J].地质与勘探,2018,54(1):90-101,12.基金项目
国家自然科学基金青年项目(编号:41502057)、宿州学院自然科学研究项目(编号:2014yyb08)、安徽省高校优秀青年人才支持计划重点项目(编号:gxyqZD2016346)和宿州学院博士科研启动基金(编号:2015jb08)联合资助. （编号:41502057）
