印度尼西亚塔里亚布岛锡铁多金属矿床的地质地球化学特征与成因

印尼塔里亚布岛新近发现大型锡铁多金属矿床,初步探明铁储量超过l亿吨,全铁品位可达50%.塔里亚布岛锡铁多金属矿床以矽卡岩型与矿浆型为主,兼具热液型,构成一个完整的成矿系统.印支期二长花岗岩源自地壳部分熔融产生的岩浆,是矿床的主要成矿物质来源与控矿因素;岩浆经过高度的演化分异过程,生成富铁矿浆贯入充填成矿,主要赋存于花岗...

Geological and Geochemical Characteristics and Genesis of the Sn-Fe Polymetallic Deposit in Taliabu Island, Indonesia

A large-size Sn-Fe polymetallic deposit, with more than one hundred million tons of iron reserves whose average grade (total Fe) is above 50%, has been recently discovered in Taliabu Island, Indonesia. Skarn and ore-magma are the main genetic types of the ore deposit, with the existence of hydrothermal type. These genetic types constitute a complete metallogenic system. The Indo-Chinese monzogranite derived from crustal partial melting magma is the main metallogenic material source and ore-control factor. Through high-degree evolution, the magma produced Fe-rich ore-magma injection and subsequently formed ore bodies, which mainly occurred in drastic variation places along rock mass boundary, soft and hard rock boundary in the contact zone between granite and Carboniferous strata. Skarn type iron ore was formed in the contact zone between Carboniferous (dolomitic) marble, calciferous metasandstone and granite. The ore deposit belonged to Eastern Australia metallogenic belt during its formation, and then moved to Southeast Asia metallogenic belt by Himalayan movement.