Deep-seated tectonic controls on superlarge deposits in China
Seventy three large to superlarge deposits in China formed in four metallogenic epochs, and are located in six metallogenic domains.By combining their time-space distribution and relevant data on crustal thickness where the superlarge deposits distribute, we discuss the controlling factors of deep tectonics on the formation of the superlarge deposits. The spatial variations in crustal thickness where the deposits occurred closely related to their different tectonic settings. The average crustal thickness of the regions where deposits are located in the Precambrian metallogenic epoch is 37.1 km and shows a double-peak distribution, which is related to the different tectonic-mineralization processes in the Tarim-north China and Yangtze metallogenic domains. In the early Proterozoic metallogenic epoch, the crustal thickness is 43.4 km and shows a normal distribution. In the late Palaeozoic-early Mesozoic metallogenic epoch, it is about 41.2 km thick and shows multi-peak distribution, which can be related to the dispersing distribution in the metallogenic domain of these superlarge deposits.During the post-Indosinian metallogenic epoch, the crust is 37.3 km thick, and shows a oblique distribution, which resulted from different tectonic settings in eastern and western China.
superlarge deposits deep geotectonics metallogenic dynamics China
Liqiang Yang Jun Deng Jianguo Wang Jianping Wang Qinfei Wang
State Key laboratory of Geological Processes and Mineral Resources, China University of Geosciences, Key Laboratory of Lithosphere Tectonics and Lithoprobing Technology of Ministry of Education, China
国际会议
第八届国际矿床地质会议(Proceedings of the Eighth Biennial SGA Meeting)
北京
英文
91-93
2005-08-18（万方平台首次上网日期，不代表论文的发表时间）