闽北后山地区火山热液型金矿地质特征及找矿潜力  

Geological Characteristics and Prospecting Potential of Volcanic Hydrothermal Gold Deposits in Houshan Area of Northern Fujian

作　　者：郑飞 ZHENG Fei(97 Geological Team of Fujian Province, Quanzhou 362000, China)

机构地区：[1]福建省197地质大队,福建泉州362000

出　　处：《矿业工程》2021年第5期5-9,共5页Mining Engineering

基　　金：福建省公益性基础性地质调查项目(编号:GY2015-0206);福建省地质勘查专项资金项目(编号:MGT201804)联合资助。

摘　　要：闽北后山地区地处欧亚大陆板块东南缘的闽东断坳带寿宁-华安断隆带与北武夷隆起区政和-南平裂隙槽结合部位,金矿成矿地质条件优越。从矿床学方面入手,在区域资料和勘查成果基础上,对该区典型金矿床成矿地质环境、矿体展布、矿石特征及矿床成因进行了分析,探讨了该区成矿地质条件和找矿标志,认为矿床受控于北东向和近南北向脆性断裂构造,早白垩世石帽山群火山岩侵入伴随多次热液蚀变的构造蚀变岩带,燕山期侵入岩正长斑岩脉及花岗斑岩脉与围岩出现硅化、钾长石化、绿泥石化等是直接找矿标志。东际、仙岩、后仑山、岭头等地为该区金矿重点找矿区,后山地区也将是闽北火山热液型金矿找矿潜力区。The Houshan area in northern Fujian is located at the junction of the Shouning-Hua′an faulted uplift belt in the eastern Fujian fault depression belt on the southeastern margin of the Eurasian continental plate and the Zhenghe-Nanping fissure trough in the northern Wuyi uplift area.The geological conditions of gold deposits are superior.Starting from the aspect of mineral deposit science,based on regional data and exploration results,analyze the metallogenic geological environment,the ore body distribution,the ore characteristics and the ore genesis of the typical gold deposits in this area,and discuss the metallogenic geological conditions and prospecting sign in this area,it is believed that the deposit is controlled by the north-east and near-south-trending brittle fracture structures.Intrusion of Shimaoshan Group volcanic rock in the early Cretaceous Period along with tectonic alteration rock belt of multiple hydrothermal alteration,silicification,potash feldspathization and chloritisation etc appearing in the orthophyre dyke and granite porphyry dyke of Yanshanian intrusive rock with surrounding rock are the direct signs to locate ore.Dongji,Xianyan,Houlunshan and Lingtou etc are the key prospecting targets in this area,the Houshan district is also the potential area for the Mibei volcanic hydrothermal type gold ore prospecting.

关 键 词：火山热液型金矿 成矿条件 找矿标志 找矿潜力 闽北地区 

分 类 号：P618.51[天文地球—矿床学]