福建龙岩铜坑—桃坪山钼多金属矿床地质特征及成因浅析  

Geological Characteristics and Genesis of Tongkeng-taopingshan Molybdenum Polymetallic Deposit in Longyan City,Fujian Province

作　　者：倪建辉[1] Ni Jianhui(The No.8 Geological Team of Fujian,Longyan,364012)

机构地区：[1]福建省第八地质大队,龙岩364012

出　　处：《福建地质》2024年第4期273-281,共9页Geology of Fujian

摘　　要：通过分析总结铜坑—桃坪山钼多金属矿床区域成矿地质背景,详细了解了矿体的空间分布,矿体与地层、岩浆岩、构造的时空关系,岩浆岩的分布、岩石学特征、侵入期次、含矿性,矿化分带与围岩蚀变类型及分带的关系。根据同位素年代学研究成果,辉钼矿成矿的Re-Os同位素模式年龄为(116.6±1.9)~(118.9±2.0)Ma,花岗斑岩的年龄为122.1~127.1 Ma,得出铜坑—桃坪山矿区的成矿成岩过程具有同时性,为早白垩世。氢、氧、硫同位素的测试结果表明,成矿物质主要来源于下地壳或上地幔,矿床主要类型为斑岩型。对铜坑—桃坪山矿床的成因探讨,为寻找斑岩型钼矿提供了新的思路。Tongkeng-taopingshan mining area is a molybdenum polymetallic deposit.The regional metallogenic geological background is analyzed and summarized in this paper,the distribution,petrological characteristics,intrusive stages,ore-bearing characteristics of magmatic rocks,and the relationship between mineralization zoning and alteration types and zoning of wall rocks.According to the results of isotopic chronology,the age of the Re-Os isotopic model of the molybdenite is(116.6±1.9)~(118.9±2.0)Ma,and the age of the granite porphyry is 122.1~127.1 Ma,it is concluded that the metallogenic and diagenetic processes in tongkeng-taopingshan mining area are simultaneous and belong to Early Cretaceous.The results of hydrogen,oxygen,and sulfur isotopes show that the ore-forming materials mainly come from the lower crust or upper mantle.By summing up,it provides a new idea for prospecting porphyry molybdenum deposit in the depth of this area and its surroundings.

关 键 词：钼多金属矿床 地质特征 矿床成因 福建龙岩 

分 类 号：P618.65[天文地球—矿床学]