我国硅灰石矿成矿区带划分及成矿规律  

Division of Wollastonite Metallogenic Belt and Metallogenic Regularity in China

作　　者：颜玲亚 焦丽香[1] 刘海泉[1] 高树学[1] 周雯[1] 欧阳友和 韩兰臻 YAN Ling-ya;JIAO Li-xiang;LIU Hai-quan;GAO Shu-xue;ZHOU Wen;OUYANG You-he;HAN Lan-zhen(Shandong Branch of China National Geological Exploration Center of Building Materials Industry,Jinan 250100,China)

机构地区：[1]中国建筑材料工业地质勘查中心山东总队,山东济南250100

出　　处：《中国非金属矿工业导刊》2022年第1期1-6,36,共7页China Non-Metallic Minerals industry

基　　金：中国地质调查局“中国矿产地质志项目”(编号:DD20160346、DD20190379)资助。

摘　　要：本文通过对硅灰石矿床分布特征、矿床类型、成矿时代和矿床成因的分析与归纳,总结了我国硅灰石矿床成矿规律,划分了硅灰石成矿区带,分析了硅灰石时空分布特征。研究结果表明:我国硅灰石矿床成因类型主要为接触热变质型和接触交代型(矽卡岩型)。主要分布在滨太平洋成矿域,共划分了吉中等8个硅灰石成矿区带。硅灰石集中分布在江西、吉林、辽宁、云南、青海5省;东北地区硅灰石查明资源储量(矿石量)位居全国第一,其次是华东地区,中南地区。硅灰石赋矿层位从元古界至中生界均有分布,以晚古生界石炭系和二叠系为主。成矿时代主要为燕山期、印支期和海西期。矿床通常产于富含硅质的石灰岩(或大理岩)与各类侵入体的接触变质带的一定范围内,在侵入体的烘烤及提供足够热量情况下,富含硅质石灰岩中的石英(游离SiO;)和方解石重新组合而形成硅灰石。Based on the analysis and induction of the distribution characteristics, deposit types, metallogenic age and genesis of wollastonite deposits, this paper summarizes the metallogenic regularity of wollastonite deposits in China. Wollastonite is a typical metamorphic mineral, and its genetic types are mainly contact thermal metamorphism type and contact metasomatism type(skarn type). The I-4 coastal Pacific metallogenic domain, which is mainly distributed in the east of China, is divided into 8 metallogenic zones related to wollastonite. Wollastonite is mainly concentrated in Jiangxi, Jilin, Liaoning, Yunnan and Qinghai;Among them, the identified resource reserves(ore volume) of wollastonite in northeast China ranks first in China, followed by east China and central south China. Wollastonite ore bearing horizons are distributed from proterozoic to mesozoic, mainly in late paleozoic carboniferous and permian. Magmatic arc, island arc, rift and passive continental margin are favorable metallogenic tectonic units of wollastonite. The intrusive rocks related to wollastonite mineralization are mainly Yanshanian, Indosinian and Hercynian. The deposit usually occurs in a certain range of the contact metamorphic zone between siliceous limestone(or marble) and various intrusions. Under the condition of baking of the intrusions and providing sufficient heat, quartz(free SiO2) and calcite in siliceous limestone are recombined to form wollastonite.

关 键 词：硅灰石 地质特征 成矿规律 成矿区带 

分 类 号：P619.239[天文地球—矿床学]