A revised chronostratigraphic dating of metamorphosed basement strata of Jiangnan old land and its implication for Wuling tectonic movement
In the study of metamorphosed basement of Jiangnan old land, the conspicuous fundamental geologic problem still is accurate chronostratigraphic ascertainment of the basement. The chronostratigraphic ascer- tainment of the basement not only involves division and correlation of metallogenic strata and time limit of structure evolution, but also has a direct influence on the study of fundamental geology problem related to prospecting of stratabound ore deposits. In the latest chronostratigraphic scale of China, the correlation of Precambrian strata and explanation of tectonic setting have changed a great deal. Basing on the latest se- ries of zircon U-Pb dating data for the Neoproterozoic strata of the Yangtze and Cathaysia blocks, this pa- per preliminarily reveals distribution of metamorphosed basement strata and volcanism in the Jiangnan old land. In combination with basic characters of the global Greenvill orogeny, the revision of Chronostrati- graphic dating of metamorphosed basement strata of the Jiangnan old land will be beneficial to reconfirm the metallogenic background of the Jiangnan orogenic belt, and provides fundamental chronostratigraphic data of stratabound ore deposits to serve the new-round survey of mineral resources.
Jiangnan old landNeoproterozoicchronostratigraphic datingtectonic movement
国家科技期刊平台
NSTL
万方数据
维普
