矿床地质2024，Vol.43Issue(2)：396-414,19.DOI:10.16111/j.0258-7106.2024.02.010
冀东高家店金矿床成因:来自金及载金黄铁矿化学成分、流体包裹体和氢氧硫同位素的证据
Genesis of Gaojiadian gold deposit in eastern Hebei Province:Evidences from chemical composition of gold and gold-bearing pyrite,fluid inclusions,and H-O-S isotopes
摘要
Abstract
The Gaojiadian gold deposit is located in the central part of the ore concentration area from eastern Hebei Province on the northern North China Craton.It is a typical altered rock type gold deposit,with a small portion being quartz vein type.It occurs in the granite and diorite of the Gaojiadian rock body and is controlled by fault structures.In order to explore the genesis of the Gaojiadian gold deposit,a systematic studies of deposit geology,the chemical composition of gold and gold-bearing pyrite,fluid inclusions,and H-O-S isotopes have been carried out in this paper.The results indicate that the hydrothermal mineralization period of the Gaojiadian gold deposit includes four stages,with stagesⅡandⅢbeing the main mineralization stages.Pyrite is the main carrier of gold minerals,gold minerals are divided into natural gold and silver-gold ore,accumulated within pyrite as indepen-dent gold minerals.The Fe and S content and Fe/S element ratio of pyrite during the main mineralization stage re-veal that the gold deposit has the characteristics of magmatic hydrothermal type.The type of fluid inclusions in the main mineralisation stage is dominated by liquid-rich two-phase H2O solution inclusions,followed by CO2-containing three-phase inclusions,which are medium-temperature,medium-low-salinity fluids.The δ18OH2O val-ues of the fluids in different mineralisation stages range from 1.82‰ to 5.60‰,and the δD values range from-83.3‰to～-55.3‰,indicating that the fluids are mainly from magma water,with a small amount of atmospheric precipitation mixed in.The δ34S value of pyrite in the main mineralisation stage is 2.40‰～5.61‰,showing the characteristics of mantle sulphur or magma sulphur,revealing that the sulphur of mineralisation material mainly comes from deep magma.The comprehensive study concludes that the multi-phase magmatic intrusion activities of the Gaojiadian rock body provided sufficient heat sources and metallogenic fluids for gold mineralisation,and thus the Gaogadian gold deposit is of magmatic-hydrothermal type.关键词
黄铁矿/电子探针/流体包裹体/氢氧硫同位素/高家店金矿床/冀东Key words
pyrite/EMPA/fluid inclusions/H-O-S isotopes/Gaojiadian gold deposit/eastern Hebei Province分类
天文与地球科学引用本文复制引用
杨爱雪,吕水,许曼,邢运涛,刘海龙,韦文国,安梦莹..冀东高家店金矿床成因:来自金及载金黄铁矿化学成分、流体包裹体和氢氧硫同位素的证据[J].矿床地质,2024,43(2):396-414,19.基金项目
本文得到河北科技厅重点研发项目(编号:22374201D)、河北省自然资源厅科研项目(编号:13000024P00F2D410444H)、河北地质矿产勘查开发局科研项目(编号:13000022P0069B410037Y)和河北地质矿产勘查开发局科研项目(编号:13000023P0069B410163U)联合资助 （编号:22374201D）
