干旱区生态环境知识资源中心(Arid): Using groundwater in the hyper-arid Atacama Desert to discover buried hydrothermal mineral deposits

Arid

DOI	10.1080/00206814.2022.2037022
	Using groundwater in the hyper-arid Atacama Desert to discover buried hydrothermal mineral deposits
	Kidder, J. A.; Leybourne, M. I.; Layton-Matthews, D.
通讯作者	Kidder, JA (corresponding author)，Geol Survey Canada, 601 Booth St, Ottawa, ON, Canada.
来源期刊	INTERNATIONAL GEOLOGY REVIEW
ISSN	0020-6814
EISSN	1938-2839
出版年	2022-02
英文摘要	Epithermal deposits occur in many metallogenic belts globally and are economically important sources of precious and base metals. However, post-mineral cover (both transported and younger deposits) also occurs in many prospective districts and hinders exploration efforts. Hydrogeochemistry is a potentially useful exploration tool in these environments, with water-rock interaction shown from other studies to produce large hydrogeochemical footprints. Groundwaters from in and around the Vaquillas (Au-Ag) epithermal deposit in the pre-cordillera of northern Chile are typically Ca-SO42- type with meteoric upflow groundwaters interacting with the ore body and producing a significant downflow (down hydraulic head) mobility (up to 3 km) of (oxy)anions of arsenic and molybdenum, which contrasts with proximal trace cation anomalies. Multiple sulphur endmembers contribute to the dissolved sulphate concentrations, including evaporites, primary hypogene sulphide minerals, and a single delta S-34((SO4)) value of 30.1 parts per thousand which is potentially associated with disproportionated sulphur in sulphate. This study reports anomalism from one of the most dilute endmember groundwater compositions from Chile reported to date. The sub-alkaline and weakly oxygenated groundwaters are common in many aquifers globally, making the results applicable to many other metallogenic belts. It is also the first hydrogeochemical case study of an intermediate-sulfidation epithermal deposit. Despite the highly dilute groundwaters recharging aquifers at Vaquillas, we conclude hydrogeochemistry to be a highly effective exploration tool for epithermal and porphyry deposits in areas of significant post-mineral cover.
英文关键词	Groundwater epithermal porphyry hydrogeochemistry stable isotopes mineral exploration
类型	Article ; Early Access
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000757699800001
WOS关键词	STABLE-ISOTOPE GEOCHEMISTRY ; MASSIVE SULFIDE DEPOSITS ; PORPHYRY-CU DEPOSITS ; SURFACE WATERS ; NORTHERN CHILE ; THERMODYNAMIC PROPERTIES ; WESTERN-AUSTRALIA ; COPPER-DEPOSITS ; GOLD DEPOSIT ; ORIGIN
WOS类目	Geology
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/2XILL650/377260
作者单位	[Kidder, J. A.] Geol Survey Canada, 601 Booth St, Ottawa, ON, Canada; [Kidder, J. A.; Leybourne, M. I.; Layton-Matthews, D.] Queens Univ, Dept Geol Sci & Geol Engn, Kingston, ON, Canada; [Leybourne, M. I.] Queens Univ, Arthur B McDonald Canadian Astroparticle Phys Res, Dept Phys Engn Phys & Astron, Kingston, ON, Canada
推荐引用方式 GB/T 7714	Kidder, J. A.,Leybourne, M. I.,Layton-Matthews, D.. Using groundwater in the hyper-arid Atacama Desert to discover buried hydrothermal mineral deposits[J],2022.
APA	Kidder, J. A.,Leybourne, M. I.,&Layton-Matthews, D..(2022).Using groundwater in the hyper-arid Atacama Desert to discover buried hydrothermal mineral deposits.INTERNATIONAL GEOLOGY REVIEW.
MLA	Kidder, J. A.,et al."Using groundwater in the hyper-arid Atacama Desert to discover buried hydrothermal mineral deposits".INTERNATIONAL GEOLOGY REVIEW (2022).