矿产综合利用2025，Vol.46Issue(1)：30-45,16.DOI:10.3969/j.issn.1000-6532.2025.01.004
胶东牟乳成矿带金青顶金矿床成矿流体特征及成矿作用探讨
Characteristics of Ore-forming Fluid and Mineralization of Jinqingding Gold Deposit in Mouru Metallogenic Belt,Jiaodong
摘要
Abstract
The Mouru Gold Metallogenic Belt is one of the three major one in the Jiaodong Gold Metallogenic Zone.The Jinqingding Gold Deposit is located in the southern part of the metallogenic belt and is a large quartz vein-type gold one.The research on its ore-forming fluid is still controversial.This paper starts from the study of fluid inclusions and H-O isotopes in ore quartz,combined with the geological characteristics of the deposit to discuss the ore-forming fluid and ore-forming process.Petrographic study on fluid inclusions in ore quartz showed that the primary inclusions were mainly two-phase gas-liquid inclusions and pure liquid-phase aqueous solution inclusions,with a small amount of CO2 three-phase inclusions.Microthermometric results and calculations showed that the homogenization temperature was mainly between 188.7 and 252.1℃,the salinity was mainly between 4.23%and 10.71%,the density was concentrated between 0.87 and 0.99 g/cm3,the ore-forming pressure was mainly between 48.9 and 67.3 MPa,and the ore-forming depth was between 5.6 and 6.63 km.With the ore-forming process,the temperature,pressure gradually decreased,and the density gradually increased.H-O isotope tests showed that δD values were mainly between-96.0‰ and-83.2‰,and δ18O values were mainly between 3.06‰ and 5.58‰.The ore-forming fluid was mainly derived from the mixture of magmatic and metamorphic water,and the cooling and non-mixing of the fluid were the main mechanisms for the large-scale precipitation of ore-forming materials in a short time.It is concluded that the Jinqingding gold deposit should belong to the hydrothermal vein-type gold deposit with characteristics of medium-low temperature,low salinity,low density and medium-shallow formation.关键词
胶东/矿床特征/流体包裹体/成矿作用/金青顶金矿床/牟乳带Key words
Jiaodong/Deposit characteristics/Fluid inclusions/Metallogenesis/Jinqingding gold deposit/Mourn metallogenic belt分类
地质学引用本文复制引用
宋倩,黄鑫,王勇军,邵玉宝,路长勇,李泗龙..胶东牟乳成矿带金青顶金矿床成矿流体特征及成矿作用探讨[J].矿产综合利用,2025,46(1):30-45,16.基金项目
山东省部省协议地质勘查项目(鲁勘字(2022)32号) （鲁勘字(2022）
山东省煤田地质局科研专项基金(鲁煤地科字(2023)33号) （鲁煤地科字(2023）
山东省自然基金ZR2020MD031 （）
山东省地质勘查基金项目(鲁勘字(2020)28号)资助 （鲁勘字(2020）
