辽宁小盘岭金矿床混合岩特征及与金成矿的关系  

Migmatite features and gold mineralization relationships in the Xiaopanling gold deposit,Liaoning

作　　者：刘兴国[1] 龚德铭[1] 管建华[1] 袭建国 徐桓[1] 

机构地区：[1]武警黄金第四支队,辽宁辽阳111000

出　　处：《黄金地质》2003年第2期45-49,共5页Gold Geology

摘　　要：辽宁绥中小盘岭金矿床位于混合岩化中心带的混合花岗岩内,其中间带主要为混合片麻岩,外带为以条带状混合岩为主的混合杂岩。通过对各类混合岩中造岩矿物光学特征的对比,发现随着混合岩化程度的增强,矿物光学特征有规律地变化。根据岩石中矿物的交代关系,确定在混合岩化作用过程中至少有4期热液活动。通过将区域原变质岩、混合岩和与金矿成矿有关的花岗岩类岩石地球化学成分的对比,中心带的混合花岗岩与金成矿关系密切,其原岩———厚层状黑云母斜长片麻岩很可能是金成矿的重要矿源岩,其中发育的长英质岩脉是金成矿的一个重要标志。The Xiaopanling gold deposit is located in the compound granites of centre belt of migmatization,the compound gneiss mostly occur in the middle and the banded migmatitehost compound complex mostly occur in the external.By comparison the optical features of rockforming minerals in all kinds of migmatites,it is discovered that mineral optical features varied regularly with the increase of migmatization degree.According to the metasomatic relations of the ore minerals,at least 4 periods hydrothermal events have been found presented during the migmatization.The geochemical composition contrast of regional primary metamorphic rocks,migmatites and granitoid rocks which related to gold mineralization suggested that the compound granites of centre belt had close relationship with gold mineralization,and the primary rock(a heavy bedded biotite plagiogneiss)might be the significant source rock to gold mineralization,the felsic vein developed in it was a important sign to the gold mineralization.

关 键 词：辽宁 金矿床 混合岩 混合岩化作用 成矿作用 矿源岩 成矿标志 

分 类 号：P618.51[天文地球—矿床学]