大兴安岭北部十五里桥金矿床流体包裹体特征及矿床成因

doi:10.13686/j.cnki.dzyzy.2022.05.004

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Abstract The Shiwuliqiao gold deposit is located in the junction zone between the southern margin of Upper Heilongjiang Basin, the northern margin of Yaozhan fault depression and the southern margin of Ershierzhan uplift within the Upper Heilongjiang Au-Cu-Mo metallogenic belt. The metallogenesis of the deposit can be divided into four stages, i.e. I) vein pyrite-quartz stage, Ⅱ) disseminated pyrite±chalcopyrite-quartz stage, Ⅲ) disseminated pyrite±chalcopyrite±sphalerite±galena-quartz stage and IV) low sulfide-carbonate stage, among which the polymetallic sulfide-quartz is the main metallogenic stage. The study of fluid inclusions shows that gas-rich and liquid-rich fluid inclusions are developed in stages Ⅱ and Ⅲ. The fluid in stage Ⅱ is immiscible, with the homogenization temperature of 283-394 ℃ and salinity of 2.56%-7.99%, while the homogenization temperature in stage Ⅲ is 251-298 ℃ with the salinity of 2.56%-5.09%, belonging to simple NaCl-H₂O system. The H-O isotope indicates that the ore-forming fluid is dominated by atmospheric precipitation, and the S isotope suggests that the metallogenic materials mainly come from deep magmatic sulfur. The Shiwuliqiao gold deposit is of volcanic rock-hosted epi-mesothermal type.

Key words： gold deposit fluid inclusion deposit genesis mesothermal type Daxinganling Mountains

Received: 18 October 2021

PACS:

P618.5

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	Articles by authors
	SUN Yan-feng
	ZHOU Chuan-fang
	WANG Jiu-yi
	LIANG Zhong-kai
	JIANG Ping
	DU Hai-shuang

Cite this article:

SUN Yan-feng,ZHOU Chuan-fang,WANG Jiu-yi等. FLUID INCLUSION CHARACTERISTICS AND GENESIS OF SHIWULIQIAO GOLD DEPOSIT IN NORTHERN DAXINGANLING MOUNTAINS[J]. GEOLOGY AND RESOURCES, 2022, 31(5): 606-613.

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http://manu25.magtech.com.cn/Jweb_dzyzy/EN/10.13686/j.cnki.dzyzy.2022.05.004 OR http://manu25.magtech.com.cn/Jweb_dzyzy/EN/Y2022/V31/I5/606

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