地质学报（英文版）2004，Vol.78Issue(2)：435-442,8.
40Ar-39Ar Dating of Albite and Phlogopite from Porphyry Iron Deposits in the Ningwu Basin in East-Central China and Its Significance
40Ar-39Ar Dating of Albite and Phlogopite from Porphyry Iron Deposits in the Ningwu Basin in East-Central China and Its Significance
摘要
Abstract
40Ar-39Ar dating of albite from the Meishan and Taocun iron deposits yields plateau ages of 122.90±0.16 Ma and 124.89±0.30 Ma, and isochron ages of 122.60±0.16 Ma and 124.90±0.29 Ma, respectively. Phlogopite from the Zhongshan-Gushan ore field has a plateau age of 126.7±0.17 Ma and an isochron age of 127.21±1.63 Ma. Analysis of regional geodynamic evolution of the middle-lower Yangtze River region suggests that the porphyry iron deposits were formed as a result of large-scale lithosphere delamination and strong sinistral strike-slip movement of the TanchengLujiang fault zone. The copper, molybdenum and gold deposit system in the middle-lower Yangtze River region was formed during the stress transition period of the eastern China continent.关键词
albite and phlogopite, 40Ar-39Ar dating, porphyry iron deposit, delamination, NingwuKey words
albite and phlogopite, 40Ar-39Ar dating, porphyry iron deposit, delamination, Ningwu分类
天文与地球科学引用本文复制引用
YU Jinjie,MAO Jingwen..40Ar-39Ar Dating of Albite and Phlogopite from Porphyry Iron Deposits in the Ningwu Basin in East-Central China and Its Significance[J].地质学报（英文版）,2004,78(2):435-442,8.基金项目
This study was supported by the State Basic Research Program of China (Grant No. G1999043206). （Grant No. G1999043206）
