Zircon U-Pb ages and whole-rock major and trace element date for the Fuyuangoulinchang tourmaline-bearing granites in Mohe County, Heilongjiang Province, NE China were presented in this paper. The petrogenesis of the rocks and its tectonic evolution of the massif were discussed. Zircons from the granites are of magmatic origin based on their cathodoluminescence （CL）images. The 206Pb/238U ages weighted mean age of 458±4 Ma, formed in Upper Ordovician. Chemically, the Fuyuangoulinchang tourmaline-bearing granites in Erguna massif are similar to S-type granites, belonging to the high-K calc-alkaline series. The Fuyuangoulinchang tourmaline-bearing granites have the following characeristics: without hornblende, tourmaline-bearing, A/CNK＞1.11（1.11～1.28）, enriched in Th, U, Rb, K, depleted in Sr, Ba, Nb, Ti, P, Eu, strongly peraluminous. Accordingly, the first magmatic event occurred in the late stage of collision between the Ergun block and Siberia block, and the second magmatic event might have led to the formation of Fuyuangoulinchang tourmaline-bearing granites in response to the southeast ward movement of Xing′an block towards the Ergun block, which had been collaged with the Siberia block. Due to subsequent compression, the crust was thickened and resulted in the remelting of metasands tone and the formation of the Fuyuangoulinchang tourmaline-bearing granites with some features of strongly peraluminous syn-collision S-type granite.
Duan Mingxin Zhou Chuanfang Yang Huaben Wei Xiaoyong Cai Yanlong Xu Jianxin Wang Bochao Liu Ningbo Yang Qun. Geochronology and geochemistry of Fuyuangoulinchang tourmaline-bearing granites in Mohe County, Heilongjiang Province, NE China, and their implications[J]. Chinese Journal of Geology, 2019, 54(4): 1290-1307.