沉积与特提斯地质2012，Vol.32Issue(4)：65-69,5.
湖南桃源郝坪奥陶系五峰组顶部斑脱岩LA-ICP-MS锆石U-Pb年龄
LA-ICP-MS zircon U-Pb dating of the bentonites from the uppermost part of the Ordovician Wufeng Formation in the Haoping section,Taoyuan, Hunan
摘要
Abstract
The LA-ICP-MS zircon U-Pb age of 442. 2 ±8. 1 Ma is obtained for the bentonite from the uppermost part of the Ordovician Wufeng Formation in the Haoping section, Taoyuan, Hunan. This age represents that of the volcanic activities in the Yangtze area during the Ordovician - Silurian boundary, and coincides with the age of 443. 7 ± 1. 5 Ma for the Ordovician - Silurian boundary published by the International Commission on Stratigraphy. The Ordovician - Silurian volcanic activities may have important implications for the insights into the Late Ordovician biotic extinction, sedimentary environmental changes and chronostratigraphic correlation in the study area.关键词
郝坪/LA-ICP-MS锆石U-Pb年龄/晚奥陶世/火山活动/生物灭绝Key words
Haoping/ LA-ICP-MS zircon U-Pb age/ Late Ordovician/ volcanic activity/ biotic extinction分类
天文与地球科学引用本文复制引用
谢尚克,汪正江,王剑,卓皆文..湖南桃源郝坪奥陶系五峰组顶部斑脱岩LA-ICP-MS锆石U-Pb年龄[J].沉积与特提斯地质,2012,32(4):65-69,5.基金项目
青藏高原非常规油气调查(编号:1212011221106)、国家自然科学基金项目(编号:40972087、41072088) （编号:1212011221106）
