论文部分内容阅读
根据成矿物质来源,结合成矿作用、矿体产出部位和矿物组合等因素,本文将白钨矿矿床划分为二类五型十二亚型(表1). 矿床地质特征(一)层控白钨矿床系指成矿物质来源于花岗岩的一类矿床,包括花岗岩浆演化末期-气化热液期形成的岩体型、夕卡岩型及石英脉型白钨矿床.此类矿床通常产于燕山期中-酸性岩体中,同位素年龄85～185百万年,绝大多数为花岗岩,也有的产在碳酸盐、钙铝质层内.矿床产于距岩体2公里范围内.主要矿物是氧化物及含氧盐类,其次是硫化物.不仅有高温矿物组合,
According to the origin of ore-forming materials, the combination of mineralization, ore-bearing parts and mineral assemblages, the scheelite deposit is divided into two types and five types and twelve subtypes (Table 1). Controlled scheelite refers to a group of ore-forming materials derived from granite, including the late granulifollowing - gasification hydrothermal fluid formed rock type, skarn type and quartz veined scheelite deposits. Such deposits are usually Produced in the Yanshanian - acidic rocks, the isotope ages 85 to 185 million years, the vast majority of granite, and some in carbonate, calcium aluminum layer, produced in the rock within 2 km range. The main minerals are oxides and oxygenates, followed by sulfides. Not only high-temperature mineral assemblages,