气候变化领域集成服务门户(CCPortal): Skarn-type rare metal mineralization in the Mount Shisha Pangma region: Petrological characteristics, mineralization age and its geological significance

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DOI	10.18654/1000-0569/2024.05.12
	Skarn-type rare metal mineralization in the Mount Shisha Pangma region: Petrological characteristics, mineralization age and its geological significance
	Hou KangShi; Wang JiaMin; Hu FangYang; Yang Lei
发表日期	2024
ISSN	1000-0569
EISSN	2095-8927
起始页码	40
结束页码	5
卷号	40 期号:5
英文摘要	In recent years, breakthroughs have been made in prospecting and researching Himalayan rare metals, making the Himalaya a new strategic mineral resource base in China. This study studied the petrography, mineralogy and chronology of skarn in the Tsalung and Gangbu districts in the northern of Gyirong pluton and Nyalam district, Mount Shisha Pangma region and pointed out that skarns are mainly composed of garnet, diopside, vesuvianite, epidote and amphibolite. The Tsalung skarn had apparent Li-Be-Sn mineralization, and the ore.forming elements mainly existed in vesuvianite (Li:469 x10(-6) similar to 3162 x10(-6); Be:47. 9 x10(-6) similar to 2010 x 10-6; Sn:58. 1 x10(-6) similar to 1767 x 10(-6))and mica (Li:2900 x 10(-6) similar to 3570 x 10(-6))with the high contents of Rb (1572 x 10(-6) similar to 2364 x10(-6)), Cs (390 x10(-6) similar to 749 x10(-6))and Ga (68. 2 x10(-6) similar to 111 x10(-6)). The Gangbu skarn was also dominated by Li.Be mineralization, and the Li-Be-Sn bearing minerals were vesuvianite (Li:833 x10(-6) similar to 1624 x 10(-6); Be:401 x 10(-6) similar to 1664 x 10(-6); Sn:87. 8 x10(-6) similar to 181 x10(-6))and titanite (Sn:30340 x 10(-6) similar to 48600 x 10(-6)). Sn mineralization also occurred in Nyalam skarn, and the Sn. bearing minerals were garnet (92. 3 x10-6 similar to 571 x 10(-6))and epidote (86. 0 x 10(-6) similar to 2003 x 10(-6)). The Tsalung skarn was formed at 19 similar to 18Ma, and Gangbu and Nyalam skarn was formed at 24 similar to 23Ma, which was consistent with the reported ages of albite granite and tourmaline muscovite granite and was the product of the reaction between the hydrothermal fluid that dissolved from the evolved granitic melt and the Ca.rich country rock, reflecting the characteristics of periodic mineralization of Himalayan rare metals. Hydrothermal fluid temperature decreased from similar to 680. to similar to 520 degrees C , and the late stage was an oxidation environment. The increase of porosity caused by decarbonization and CO2 release provided a channel for subsequent ore.forming fluid addition and heat transfer. Tectonic fissures controlled the attitude of ore. forming skarn. The high degree of magma differentiation enriched Li, Be, Sn in the melt, and the contact metasomatic metamorphism reaction of the late hydrothermal fluid that dissolved from the evolved granitic melt with the carbonate rocks was the primary mechanism of the skarn.type Li-Be-Sn mineralization in the Gyirong.Nyalam area. The Himalayan orogenic belt has an excellent metallogenic prospect of rare metals, and the study of contact metamorphic zone and alteration should be strengthened in the future to find more hydrothermal rare metal deposits.
语种	英语
WOS研究方向	Geology
WOS类目	Geology
WOS记录号	WOS:001208845500012
来源期刊	ACTA PETROLOGICA SINICA
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/306686
作者单位	Chinese Academy of Sciences; Institute of Geology & Geophysics, CAS; Chinese Academy of Sciences; University of Chinese Academy of Sciences, CAS; Chinese Academy of Sciences; Institute of Geology & Geophysics, CAS; Chengdu University of Technology
推荐引用方式 GB/T 7714	Hou KangShi,Wang JiaMin,Hu FangYang,et al. Skarn-type rare metal mineralization in the Mount Shisha Pangma region: Petrological characteristics, mineralization age and its geological significance[J],2024,40(5).
APA	Hou KangShi,Wang JiaMin,Hu FangYang,&Yang Lei.(2024).Skarn-type rare metal mineralization in the Mount Shisha Pangma region: Petrological characteristics, mineralization age and its geological significance.ACTA PETROLOGICA SINICA,40(5).
MLA	Hou KangShi,et al."Skarn-type rare metal mineralization in the Mount Shisha Pangma region: Petrological characteristics, mineralization age and its geological significance".ACTA PETROLOGICA SINICA 40.5(2024).