山东省长石矿成矿规律研究及找矿方向

Metallogenic Regularity and Prospecting Direction of Feldspar Deposit in Shandong Province

摘要:

通过分析山东省长石矿床时空分布规律、特征、形成条件和成因，进行了矿床类型划分，总结了成矿规律。长石矿成矿物质来源于岩浆后期含有SiO2，Al2O3，K2O，Na2O的熔浆；构造裂隙为成矿物质运移的重要通道。根据花岗伟晶岩矿物的共生关系和构造特征，将长石花岗伟晶岩矿床分为弱分异型、分异型2个类型。长石矿主要分布于岩浆岩地区，与岩浆活动关系密切，主要赋存于各时代伟晶岩中，以花岗伟晶岩型长石矿为主；在时间分布上，从新太古代至中生代各时期均有长石矿产出。根据成矿规律进行了成矿预测，指出了长石矿找矿方向。

Abstract:

Through analyzing spatial-temporal distribution, characteristics, formation conditions and the origin of feldspar deposits in Shandong province, the types of deposits have been classified and the metallogenic regularities have been summarized. The metallogenic material of feldspar comes from the magma containing SiO2, Al2O3, K2O and Na2O in the later stage of magma, and tectonic fissure is an important channel for the migration of metallogenic material. According to the symbiotic relationship and structural characteristics of granite pegmatite minerals, the feldspar granite pegmatite deposits are divided into two types: weak differentiation type and differential type. Feldspar deposits are mainly distributed in magmatic areas, closely related to magmatic activities. It mainly occurrs in pegmatite of various ages, and granite-pegmatite type feldspar deposits are its main type. In time distribution, feldspar deposits occur in all periods from Neoarchean to Mesozoic. According to metallogenic regularities, the prospecting direction of feldspar deposit has been pointed out.