干旱区生态环境知识资源中心(Arid): Metallogeny of a Pan-African oceanic arc: VHMS and gold deposits in the Ariab-Arbaat belt, Haya terrane, Red Sea Hills (Sudan)

Arid

DOI	10.1016/j.gr.2021.06.001
	Metallogeny of a Pan-African oceanic arc: VHMS and gold deposits in the Ariab-Arbaat belt, Haya terrane, Red Sea Hills (Sudan)
	Abu-Fatima, M.; Marignac, C.; Cathelineau, M.; Boiron, M. -C.
通讯作者	Cathelineau, M (corresponding author), Univ Lorraine, CNRS, CREGU, GeoRessources, F-54000 Nancy, France.
来源期刊	GONDWANA RESEARCH
ISSN	1342-937X
EISSN	1878-0571
出版年	2021
卷号	98 页码:76-106
英文摘要	Gold in the Ariab district (Red Sea Hills, Sudan) is mined in gossans developed over volcanogenic massive sulphide (VHMS) deposits formed in the context of a Tonian ensimatic arc of the Haiya terrane, in the Neoproterozoic Arabo-Nubian Shield. All the primary gold occurrences of the Ariab belt, whatever their style (VHMS-, quartz lode- or shear-zone-hosted), appear, however, to have been syn-to late-kinematic, i.e., formed in the context of the final Pan-African collision leading to the Arabian-Nubian Shield (D3 event), and therefore are post-VHMS. Gold is thus found associated with either galena or bismuth telluride in late syn- to post-metamorphic sets of (micro)cracks, mostly within earlier pyrite or arsenopyrite. Gold deposition as native gold or electrum occurred when an intense fluid circulation of metamorphic CO2-H2O rich fluids underwent significant decompression from lithostatic to hydrostatic pressures at temperatures decreasing from 400 to 430 degrees C at around 8 km depth down to 300 degrees C. Although no clear evidence of volatile unmixing was observed, the decompression, together with a temperature decrease due to dilution by aqueous rich fluids, favoured gold deposition. The late-D3 gold event in the Ariab belt has all the makings of an orogenic gold system, notably similar to the Late Carboniferous gold event in the West European Variscan belt. Thus, it is possible to propose that, at the end of the collision events, fluids released from the newly formed terrane root were channelled towards the upper crust through the major D3 shear zones such as the Oko shear zone. The fluids outpouring from these major drains were then conveyed through fault plays and damaged zones, up to specific chemical traps within massive sulphide ore bodies or quartz veins systems. Thus, the Ariab gold district could be classified as a representative of the class of orogenic gold deposits. (c) 2021 International Association for Gondwana Research. Published by Elsevier B.V. All rights reserved.
英文关键词	Volcanic Hosted Massive Sulphides (VHMS) Arabo-Nubian shield Late kinematic gold Metamorphic fluids Supergene enrichment
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000684931800005
WOS关键词	ARABIAN-NUBIAN SHIELD ; TRACE-ELEMENT GEOCHEMISTRY ; T-X CONDITIONS ; FELSIC METAVOLCANIC ROCKS ; MASSIVE SULFIDE DEPOSITS ; EGYPTIAN EASTERN DESERT ; BANDED IRON FORMATIONS ; IBERIAN PYRITE BELT ; NAJD FAULT SYSTEM ; EQUATION-OF-STATE
WOS类目	Geosciences, Multidisciplinary
WOS研究方向	Geology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/363480
作者单位	[Abu-Fatima, M.; Marignac, C.; Cathelineau, M.; Boiron, M. -C.] Univ Lorraine, CNRS, CREGU, GeoRessources, F-54000 Nancy, France; [Abu-Fatima, M.] Geol Res Author Sudan, Minist Minerals, Khartoum, Sudan
推荐引用方式 GB/T 7714	Abu-Fatima, M.,Marignac, C.,Cathelineau, M.,et al. Metallogeny of a Pan-African oceanic arc: VHMS and gold deposits in the Ariab-Arbaat belt, Haya terrane, Red Sea Hills (Sudan)[J],2021,98:76-106.
APA	Abu-Fatima, M.,Marignac, C.,Cathelineau, M.,&Boiron, M. -C..(2021).Metallogeny of a Pan-African oceanic arc: VHMS and gold deposits in the Ariab-Arbaat belt, Haya terrane, Red Sea Hills (Sudan).GONDWANA RESEARCH,98,76-106.
MLA	Abu-Fatima, M.,et al."Metallogeny of a Pan-African oceanic arc: VHMS and gold deposits in the Ariab-Arbaat belt, Haya terrane, Red Sea Hills (Sudan)".GONDWANA RESEARCH 98(2021):76-106.