干旱区生态环境知识资源中心(Arid): Groundwater geochemistry, hydrogeology and potash mineral potential of the Lake Woods region, Northern Territory, Australia

Arid

DOI	10.1080/08120099.2018.1543208
	Groundwater geochemistry, hydrogeology and potash mineral potential of the Lake Woods region, Northern Territory, Australia
	de Caritat, P.1,2; Bastrakov, E. N.1; Jaireth, S.1; English, P. M.1; Clarke, J. D. A.1; Mernagh, T. P.1,2; Wygralak, A. S.3; Dulfer, H. E.1,4; Trafford, J.1
通讯作者	de Caritat, P.
来源期刊	AUSTRALIAN JOURNAL OF EARTH SCIENCES
ISSN	0812-0099
EISSN	1440-0952
出版年	2019
卷号	66 期号:3 页码:411-430
英文摘要	We collected 38 groundwater and two surface-water samples in the semi-arid Lake Woods region of the Northern Territory to better understand the hydrogeochemistry of this system, which straddles the Wiso, Tennant Creek and Georgina geological regions. Lake Woods is presently a losing waterbody feeding the underlying groundwater system. The main aquifers comprise mainly carbonate (limestone and dolostone), siliciclastic (sandstone and siltstone) and evaporitic units. The water composition was determined in terms of bulk properties (pH, electrical conductivity, temperature, dissolved oxygen, redox potential), 40 major, minor and trace elements, and six isotopes (O-18(water), H-2(water), C-13(DIC), S-34(SO4)2-, O-18(SO4)2-, Sr-87/Sr-86). The groundwater is recharged through infiltration in the catchment from monsoonal rainfall (annual average rainfall approximate to 600mm) and runoff. It evolves geochemically mainly through evapotranspiration and water-mineral interaction (dissolution of carbonates, silicates and to a lesser extent sulfates). The two surface waters (one from the main creek feeding the lake, the other from the lake itself) are extraordinarily enriched in O-18 and H-2 isotopes (O-18 of +10.9 and +16.4 parts per thousand VSMOW, and H-2 of +41 and +93 parts per thousand VSMOW, respectively), which is interpreted to reflect evaporation during the dry season (annual average evaporation approximate to 3000mm) under low humidity conditions (annual average relative humidity approximate to 40%). This interpretation is supported by modelling results. The potassium (K) relative enrichment (K/Cl- mass ratio over 50 times that of sea water) is similar to that observed in salt-lake systems worldwide that are prospective for potash resources. Potassium enrichment is believed to derive partly from dust during atmospheric transport/deposition, but mostly from weathering of K-silicates in the aquifer materials (and possibly underlying formations). Further studies of Australian salt-lake systems are required to reach evidence-based conclusions on their mineral potential for potash, lithium, boron and other low-temperature mineral system commodities such as uranium.
英文关键词	Groundwater hydrogeochemistry mineral systems potash processes Australia
类型	Article
语种	英语
国家	Australia ; Czech Republic
开放获取类型	hybrid, Green Published
收录类别	SCI-E
WOS记录号	WOS:000466535400004
WOS关键词	BROKEN-HILL REGION ; SULFATE ; WATER ; CONSTRAINTS ; EXPLORATION ; CARBONATE ; EVOLUTION ; ISOTOPES ; SULFUR ; OXYGEN
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/2XILL650/214566
作者单位	1.Geosci Australia, GPO Box 378, Canberra, ACT 2601, Australia; 2.Australian Natl Univ, Res Sch Earth Sci, Canberra, ACT 2601, Australia; 3.Northern Terr Geol Survey, NT Dept Mines & Energy, Darwin, NT 0801, Australia; 4.Charles Univ Prague, Dept Phys Geog & Geoecol, Prague, Czech Republic
推荐引用方式 GB/T 7714	de Caritat, P.,Bastrakov, E. N.,Jaireth, S.,et al. Groundwater geochemistry, hydrogeology and potash mineral potential of the Lake Woods region, Northern Territory, Australia[J],2019,66(3):411-430.
APA	de Caritat, P..,Bastrakov, E. N..,Jaireth, S..,English, P. M..,Clarke, J. D. A..,...&Trafford, J..(2019).Groundwater geochemistry, hydrogeology and potash mineral potential of the Lake Woods region, Northern Territory, Australia.AUSTRALIAN JOURNAL OF EARTH SCIENCES,66(3),411-430.
MLA	de Caritat, P.,et al."Groundwater geochemistry, hydrogeology and potash mineral potential of the Lake Woods region, Northern Territory, Australia".AUSTRALIAN JOURNAL OF EARTH SCIENCES 66.3(2019):411-430.