干旱区生态环境知识资源中心(Arid): Quantifying mass changes during hydrothermal alteration in listwaenite-type mercury mineralization, Tavreh area, northwestern Iran

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DOI	10.1144/geochem2020-004
	Quantifying mass changes during hydrothermal alteration in listwaenite-type mercury mineralization, Tavreh area, northwestern Iran
	Imamalipour, Ali; Barak, Samaneh; Khalifani, Farzaneh Mami
通讯作者	Imamalipour, A
来源期刊	GEOCHEMISTRY-EXPLORATION ENVIRONMENT ANALYSIS
ISSN	1467-7873
EISSN	2041-4943
出版年	2020
卷号	20 期号:4 页码:425-439
英文摘要	The Tavreh mercury prospect, a listwaenite-type alteration/mineralization system, is located c. 90 km west of Khoy in northwestern Iran. Tavreh is hosted within the Khoy ophiolite zone. Three types of listwaenites have been recognized in the Khoy ophiolite: silica, silica-carbonate and carbonate. Of these three, Hg mineralization at Tavreh is spatially and genetically associated with the silica-type listwaenite, also known as berberite. Alteration and mineralization at Tavreh are restricted to a faulted contact between shale and serpentinite. The Tavreh listwaenite is inferred to form from the hydrothermal alteration of brecciated serpentinite. Major mineralogical changes resulting from this alteration include the decomposition of serpentine-group minerals and the formation of silica phases. In this study, the mass changes of 18 listwaenites from Tavreh were assessed relative to the least altered serpentinites. To illustrate these changes quantitatively a comparative analysis of three different methods of calculating mass change was undertaken using Grant's isocon analysis, MacLean's equation and Gresens' equation. Results from the three methods are similar. Listwaenite alteration was associated with a large increase in SiO2 (44.4, 36.2, 63.9%, respectively). MgO and loss on ignition were depleted (-34.8, -36.9, -36.6; -8.5, -9.3, -8.3%, respectively) and Al2O3 was relatively unchanged (0.7, 0.6, 0.9%). Mercury is the most enriched rare element in altered rock (375.1, 346.8, 474.6 ppm). Arsenic, Pb, Au and Sb were also enriched. The intensity of mass changes of the various alteration components increases significantly from the serpentinite wall rock towards the listwaenite alteration and the ore-bearing zone. Therefore, the mass balance method can probably be used to locate mineral deposits from a few hundred metres and to explore for blind mineral deposits.
英文关键词	serpentinite listwaenite mass changes isocon analysis Gresens' equation Maclean mercury Tavreh Iran
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000586472900003
WOS关键词	SOUTH EASTERN DESERT ; EPITHERMAL GOLD ; DEPOSIT ; EXPLORATION ; ROCKS ; GEOCHEMISTRY ; OPHIOLITES ; EVOLUTION ; ELEMENTS ; ORIGIN
WOS类目	Geochemistry & Geophysics
WOS研究方向	Geochemistry & Geophysics
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/327357
作者单位	[Imamalipour, Ali; Barak, Samaneh] Urmia Univ, Dept Min Engn, Orumiyeh, Iran; [Khalifani, Farzaneh Mami] Univ Tehran, Coll Engn, Sch Min Engn, Tehran, Iran
推荐引用方式 GB/T 7714	Imamalipour, Ali,Barak, Samaneh,Khalifani, Farzaneh Mami. Quantifying mass changes during hydrothermal alteration in listwaenite-type mercury mineralization, Tavreh area, northwestern Iran[J],2020,20(4):425-439.
APA	Imamalipour, Ali,Barak, Samaneh,&Khalifani, Farzaneh Mami.(2020).Quantifying mass changes during hydrothermal alteration in listwaenite-type mercury mineralization, Tavreh area, northwestern Iran.GEOCHEMISTRY-EXPLORATION ENVIRONMENT ANALYSIS,20(4),425-439.
MLA	Imamalipour, Ali,et al."Quantifying mass changes during hydrothermal alteration in listwaenite-type mercury mineralization, Tavreh area, northwestern Iran".GEOCHEMISTRY-EXPLORATION ENVIRONMENT ANALYSIS 20.4(2020):425-439.