Characterization of ore-forming fluids in the Tamusu sandstone-type uranium deposit, Bayingobi Basin, China: Constraints from trace elements, fluid inclusions and C–O–S isotopes

Zhang, Cheng-Yong; Fengjun, Nie; Jiao, Yangquan; Deng, Wei; Peng, Yunbiao; Shuren, Hou; Dai, Mingjin; Ye, Tengfei

doi:10.1016/j.oregeorev.2019.102999

Cited by 19 publications

(7 citation statements)

References 24 publications

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“…This basin is a Mesozoic terrestrial rift basin that developed on the Palaeozoic fold basement and Precambrian crystalline bedrock (Wei et al , 2006; Wei & Jiang, 2019). The basement is composed primarily of Palaeozoic and early Mesozoic intermediate to felsic granitic plutons, mafic to felsic volcanic rocks and Proterozoic to Palaeozoic sedimentary or metasedimentary units (Meng et al , 2002; Zhang et al , 2019). Triassic and Jurassic strata are only distributed in the northwest area of the basin and consist of fluvial and lacustrine sandstone, shale, mudstone and coal seams.…”

Section: Geological Settingmentioning

confidence: 99%

“…1c). The Early Cretaceous Bayingebi formation is divided into the lower Bayingebi formation (K 1 b 1 ) and the upper Bayingebi formation (K 1 b 2 ) (Zhang et al , 2019). Alluvial fan and fan delta systems developed mostly in the lower Bayingebi formation, consisting of red detrital rocks that underwent a maximum burial depth of ~1400 m. The sedimentary rocks of the upper Bayingebi formation contain sediments typical of alluvial fan, fan delta, braided delta and well-developed lacustrine facies.…”

Section: Geological Settingmentioning

confidence: 99%

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Mineralogical and hydraulic characteristics of mudstone in the Tamusu candidate area in northwest China for high-level radioactive waste geological disposal

Xiang

Liu

et al. 2020

Clay miner.

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The Tamusu region in northwest China is a key candidate area for China's clay rock deep geological repositories (DGRs) for high-level radioactive waste (HLRW) as it is composed of a continuous layer of thick lacustrine mudstone. To evaluate this mudstone as a host rock, two special test boreholes were drilled to investigate its spatial distribution and mineralogical and hydraulic characteristics. The southwest boundary and depositional centre of the lake basin were well delineated by boreholes TZK-1 and TZK-2. The continuous single-layer thickness of the target mudstone formation was up to 300 m at a depth of 500–800 m. Three main mineral types were determined, namely carbonates (mainly dolomite and ankerite), analcime and albite, and their abundance was used to distinguish three different facies. Other mineral phases, such as clay minerals (mainly illite and kaolinite), pyrite, hematite, quartz and calcite, were present as admixtures. The presence of carbonates may increase the mechanical strength and analcime may enhance the radionuclide adsorption properties of the mudstone. The self-sealing properties, which may be affected by the small amount of clay minerals, remain to be investigated. The hydraulic conductivity of the mudstone determined via in situ pulse tests ranged from 10–13 to 10–10 m s–1, suggesting that the Tamusu mudstone has ultra-low permeability. The transmissivity of the Tamusu mudstone fluctuated in regions with varying lithologies, but remained relatively constant for consistent lithologies. In summary, these preliminarily results confirm the possible suitability of the target formation as a host rock for DGRs of China's HLRW.

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Section: Geological Settingmentioning

confidence: 99%

Section: Geological Settingmentioning

confidence: 99%

Mineralogical and hydraulic characteristics of mudstone in the Tamusu candidate area in northwest China for high-level radioactive waste geological disposal

Xiang

Liu

et al. 2020

Clay miner.

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“…9 The ATF has been extending northeastward into the Mongolian region and is mainly characterized by a strike slip. 16,17 The Bayingebi Basin is The basin spans four different geotectonic units 18,19 and is oriented in a near-EW direction. The Yingejing Sag is located at the southern end of the Bayingebi Basin and is oriented in a roughly NE direction, covering an area of approximately 9000 km 2 (Figure 1a).…”

Section: Introductionmentioning

confidence: 99%

Characteristics and Geological Significance of Lacustrine Hydrothermal Sedimentary Rocks in the Yingejing Sag in Bayingebi Basin, Inner Mongolia, Northwestern China

Dai,

Zhang,

Luo

et al. 2024

ACS Omega

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In order to promote site screening for high-level radioactive waste (HLW) disposal purposes, the characteristics of argillaceous rock (potential host rock) from the Yingejing Sag of the Bayingebi Basin, Northwest China have been well discussed. Results show that (1) Unlike argillaceous host rocks in foreign countries, the argillaceous rock mainly consists of analcite, dolomite, and albite; the contents of clay minerals are only about 10%. Five typical structures could be categorized, dominating by the massive structure. (2) Geochemical characteristics have the characteristics of abundance in deep source gas and liquid trace elements, a gentle right dip in the distribution pattern of rare-earth elements. (3) Petrological and geochemical characteristics determine the argillaceous rock as the genesis of lacustrine hydrothermal sedimentary rock. The hydrothermal sedimentary model also has been constructed, mainly controlled by tectonic activity of the Altyn Tagh fault from 100 to 120 Ma. The massive argillites with analcite and dolomite would lay the foundation for confirming the site for HLW disposal purposes in China.

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“…Sandstone-type uranium deposits (SUDs) that were overprinted and reworked by or formed directly by hot fluid flow (HFF, originates from the deep-seated basin with temperature >75°) processes have been progressively recognised (Fan et al 2006; Liu et al 2006; Nie et al 2010; Abzalov et al 2015; Zhang et al 2015). Nie et al (2010) studied the SUDs in Niger, Africa, and suggested that within the Teguida area, uranium mineralisation in sandstone is caused by HFF, which is significantly different from the pattern of oxidation-related uranium mineralisation.…”

Section: Introductionmentioning

confidence: 99%

“…The occurrence of multi-phased paleo-fluid events is conducive to migration of uranium-bearing fluids and uranium enrichment. Zhang et al (2015) demonstrated that vein-mass gypsum, calcite, hydrothermal metal sulphides, sulphates, and recrystallised minerals are ubiquitous across the Tamusu uranium deposit in the Bayinggebi Basin based on outcrops, core observations, and microscopic analysis, indicating uranium mineralisation was also affected by the overprint of HFF processes after the process of oxidation-related uranium mineralisation.…”

Section: Introductionmentioning

confidence: 99%

Mineralisation from hot fluid flows in the sandstone-type uranium deposit in the Kailu Basin, Northeast China

Fengjun

Yan

Xia

et al. 2018

Applied Earth Science

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The Qianjiadian-Baixingtu uranium deposit (QBUD) is in the post-Jurassic extensional Kailu basin of northeast China. There is a well-developed fault system in and adjacent to the deposit, and uranium mineralisation appears controlled by faults F 1, F 2, and F 3. Lots of diabase (dolerite) intrusions related to regional faults are extensive throughout the QBUD. The ellipsoidal and lenticular mineralised bodies in the QBUD conflict with the interlayered oxidation genesis. Furthermore, heat from the diabase intrusions not only makes the wall rocks hard, but plenty of new cement minerals are precipitated from hot fluid flow (HFF). The clastic grains in the host sandstone are strongly altered by HFF. Carbonate cements involves calcite, ankerite, and Fe-rich dolomite. There are three inclusion temperature peaks: ∼90°C, 110-120°C, and 140-150°C, and three ranges of inclusion salinity: 5.

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Characterization of ore-forming fluids in the Tamusu sandstone-type uranium deposit, Bayingobi Basin, China: Constraints from trace elements, fluid inclusions and C–O–S isotopes

Cited by 19 publications

References 24 publications

Mineralogical and hydraulic characteristics of mudstone in the Tamusu candidate area in northwest China for high-level radioactive waste geological disposal

Mineralogical and hydraulic characteristics of mudstone in the Tamusu candidate area in northwest China for high-level radioactive waste geological disposal

Characteristics and Geological Significance of Lacustrine Hydrothermal Sedimentary Rocks in the Yingejing Sag in Bayingebi Basin, Inner Mongolia, Northwestern China

Mineralisation from hot fluid flows in the sandstone-type uranium deposit in the Kailu Basin, Northeast China

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