淮北三铺地区矽卡岩型矿床地质特征与成矿物质来源
Geological characteristics and source of ore-forming materials of skarn-type deposits in the Sanpu area of Huaibei
产思维 1张顺林 1汪青松1
作者信息
- 1. 安徽省勘查技术院,安徽 合肥 230031;安徽省地质矿产勘查局能源勘查中心,安徽 合肥 230031
- 折叠
摘要
淮北三铺地区是皖北重要的铁多金属矿产地,矿床类型主要为矽卡岩型,主要分布在三铺岩体南北接触带,矿体主要产于岩体与碳酸盐岩接触带、捕虏体和层间裂隙中.为总结三铺地区矽卡岩型矿床成矿规律,探讨成矿物质来源,本文在分析三铺地区矿床地质特征的基础上,对与三铺岩体有关的典型矿床中的矿石进行了硫、铅同位素研究.研究结果表明,矿床硫具有岩浆来源与地层硫混合的多来源特征;矿石和岩体铅同位素具有低放射性铅特征和深源性的特点,矿石铅来源于岩体,铅的初始来源与下地壳或地幔有关.综合以上表明三铺地区成矿物质来源于下地壳或地幔,且与岩浆活动关系密切,岩浆活动除从下地壳或地幔带来成矿物质外,并驱使围岩中的成矿物质活化、迁移,最后在岩体与碳酸盐岩接触带附近富集成矿,从而形成铁多金属矿床.
Abstract
The Sanpu area in Huaibei is an important iron polymetallic ore producing area in northern Anhui Province.The deposit type is mainly skarn-type,mainly distributed in the northern and southern contact zones of the Sanpu pluton.The ore body mainly occurs in the contact zone between the pluton and carbonate rock,xenoliths,and interlayer fractures.In order to summarize the mineralization patterns of skarn-type deposits in the Sanpu area and explore the sources of ore-forming materials,this paper analyzes the characteristics of deposit geologys in the Sanpu area and conducts sulfur and lead isotope studies on the typical ores related to the Sanpu pluton.The research results indicate that the sulfur in the deposit shows the characteristic of multiple sources by mixing of magma and strata.The lead isotopes of ores and pluton are characterized by low radioactive lead and deep source.The lead in ores comes from pluton,and the initial source of lead is related to the lower crust or mantle.Overall,the above indicates that the ore-forming materials in the Sanpu area originated from the lower crust or mantle,and are closely related to magmatic activity,Magmatic activity not only brings ore-forming materi-als from the lower crust or mantle,but also drive the activation and migration of ore-forming materials in the sur-rounding rocks,and finally enriches and forms iron polymetallic deposits near the contact zone between the pluton and carbonate rock.
关键词
硫-铅同位素/矽卡岩型矿床/矿床地质特征/成矿物质来源/淮北三铺地区Key words
S-Pb isotopes/skarn-type deposits/geological characteristics of the deposit/source of ore-forming materials/Sanpu area of Huaibei引用本文复制引用
基金项目
安徽省公益性地质工作项目(2016-g-3-34)
出版年
2024
NETL
NSTL
维普
万方数据