摘要
东海地区地处苏鲁造山带南缘,郯庐断裂带以东,前寒武系片麻岩及燕山期岩浆岩出露广泛,构造复杂。通过东海地区罗庄萤石矿产地质调查工作,认为研究区萤石矿的形成与酸性侵入岩大解庄单元二长花岗岩(K_(1)DJ)的侵入活动有关。随着侵入过程中带来的酸性成矿热液,Ca和F元素一同从城头片麻岩(CGN)中以离子形式浸出,在层间破碎带和断裂中形成萤石矿脉,矿床成因属中—低温热液型。
The Donghai area is located in the southern margin of the Sulu orogenic belt,east of the Tanlu fault zone,where Precambrian gneiss and Yanshanian magmatic rocks are widely exposed and have complex structures.Through the geological survey of Luozhuang fl uorite deposits in the Donghai area,it is believed that the formation of fl uorite deposits in the study area is related to the intrusion of the acid intrusive rock Dajiezhuang unit monzonitic granite(K_(1)DJ).With the acidic ore-forming hydrothermal fl uid brought in during the intrusion,Ca and F elements were leached together in the form of ions from the Chengtou gneiss(CGN),and fl uorite veins were formed in the interlayer fracture zone and fracture.The genesis of the deposit belongs to Medium-low temperature hydrothermal type.
作者
吕游
夏强
王雷振
于龙庆
LV You;XIA Qiang;WANG Lei-zhen;YU Long-qing(Jiangsu Branch of China National Geological Exploration Center of Building Materials Industry,Nanjing 21135,China)
出处
《中国非金属矿工业导刊》
2022年第2期39-41,共3页
China Non-Metallic Minerals industry
基金
“中国建筑材料工业地质勘查中心地质找矿专项”项目“江苏省东海县横沟乡地区萤石地质找矿”(编号:建地矿〔2020〕16号)。
关键词
江苏东海
萤石
成矿条件
Jiangsu Donghai
fl uorite
metallogenic conditions
