摘要
虎拉林金矿区主要地层为中侏罗统绣峰组陆源碎屑岩,岩浆岩以燕山期花岗斑岩和石英斑岩为主。在地层与岩体接触带附近发育爆破角砾岩,金矿(化)体主要受断裂控制而产于爆破角砾岩筒(带)中。矿区内已圈出6条矿(化)体,总体走向近SN,以1、2号为主要矿体。成矿与爆破角砾岩有关,形成一体多型的矿化分布形式。δ34S变化范围为-0 2‰～0 8‰,具有深源岩浆S特征。S和Pb同位素、流体包裹体、稀土元素等特征表明,成矿物质来自地壳深部或地幔,成矿流体以深部岩浆热液为主。39Ar 40Ar法测得金矿成矿年龄为135 5Ma。
The main strata of the Hulalin gold deposit are composed of terrigenous clastic rocks of Middle Jurassic period, and the magmatites in the gold deposit area are dominated by the granite-porphyries and quartz-porphyries of Yanshan Period. The explosion breccias develop near the contact zone between strata and rock bodies. The gold bodies mainly develop in the explosion breccia pipes controlled by the fault structures. There are 6 gold bodies blocked out in the ore district, the general trend is about SN, and the No.1 and No.2 of them are the dominant ore bodies. The mineralization relative to the explosion breccias and forms a distribution of one-body with multi-shapes. δ^(34)S ranges from -0.2‰～0.8‰ and shows S features of plutonic magmas. The studies of S and Pb isotopes, fluid inclusions and rare-earth elements indicate that the ore-forming materials derive from deep crust or mantle, and the ore-forming fluids derive from the deep magmatic hydrothermal solution. The ( )^(39)Ar/^(40)Ar dating of the ore-forming age was 135.5 Ma.
出处
《黄金地质》
2003年第4期13-18,共6页
Gold Geology
