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区域地质概况本文所述的锡多金属成矿带,位于新华夏系第三巨型隆起带大兴安岭南段.区内出露地层有志留系、石炭系、二迭系、侏罗系、白垩系、第三系和第四系,而以二迭系和侏罗系分布最广.本区以华夏系构造最发育,其次是纬向构造体系和新华夏构造体系,三者构成全区的构造格局. 区内共有中酸性岩体661个,约占总面积的17%.岩浆活动可分为华力西期、印支期和燕山期三个旋回.华力西期岩浆活动主要受东西向构造控制,构成以酸性岩浆为主的规模较大的杂岩体;印支期岩浆活动受东西向及北东与东西向断
Regional Geological Survey The tin polymetallic metallogenic belt described in this article is located in the southern section of Daxing’anling, the third giant uplift belt in the Neo-Huaxia Series. There are Silurian, Carboniferous, Permian, Jurassic, Cretaceous, Tertiary and Quaternary, while the Permian and Jurassic are the most widely distributed in this area, the Huaxia system is the most developed, followed by the latitudinal and Xinhuaxia tectonic systems, which constitute the tectonic framework of the whole area There are 661 moderately acidic rocks in the area, accounting for about 17% of the total area.The magmatism can be divided into three cycles: the Variscan Period, the Indosinian Period and the Yanshan Period.The magmatic activities in the Waleixian Period are mainly influenced by the east-west structure Control, constitute a large complex of acidic magma-based complex rock; Indosinian magmatism by east-west and east-west and east-west to break