Genesis of the Sanbaqi deposit: a paleokarst-hosted uranium deposit in China

Min, Maozhong; Zheng, Da; Shen, B.W.; Wen, Guang; Wang, X.; Gandhi, S S

doi:10.1007/s001260050118

Cited by 8 publications

(5 citation statements)

References 20 publications

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“…sinkhole fills, local thickness variations, cumulative wedge-outs). These features have been described in the Colorado Plateau, USA (Weir et al 1961;Cater 1970;Sugiura & Kitcho 1981;Gutiérrez 2004), southern Saskatchewan, Canada (Christiansen 1971;Gendzwill & Hajnal 1971;Christiansen & Sauer 2001), NE Spain (Gutiérrez 1996(Gutiérrez , 2014 and southern Hunan, China (Min et al 1997). Large collapse palaeosinkholes have also been identified through 3D seismic surveys in sedimentary basins of southern Australia (Brown 1999), Venezuela (Castillo & Mann 2006), the USA (McDonnell et al 2007), the Mediterranean Sea (Bertoni & Cartwright 2005;Lofi et al 2012) and the South China Sea (Sun et al 2013).…”

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confidence: 85%

“…Fossil collapse sinkholes are markers of large-scale deep-seated karstification that favoured the migration and/or accumulation of hydrocarbons in the Maracaibo basin, Venezuela (Castillo & Mann 2006), in the Fort Worth basin, Texas, USA (McDonnell et al 2007), and in the South China Sea basin (Sun et al 2013). Palaeosinkhole-hosted uranium deposits of a high economic importance have been exploited in China (Min et al 1997) and Arizona, USA (Wenrich & Titley 2008). Sun et al (2013) highlighted that deep-burial dissolution should be taken into account when assessing reservoir heterogeneity and infrastructure risks in the largest offshore oilfields.…”

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confidence: 99%

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New insights into the genesis of the Miocene collapse structures of the island of Gozo (Malta, central Mediterranean Sea)

Arnedo

Tonelli

Gutiérrez

et al. 2015

JGS

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The large palaeosinkholes located in the NW of Gozo (central Mediterranean Sea, Malta) offer excellent exposures that provide information on the geometry and kinematics of large karst-related collapse structures. Detailed geological analysis of these peculiar palaeosinkholes indicates that deep-seated evaporite dissolution is the most feasible hypothesis to explain their formation, according to the following evidence. (1) Several structures have been formed by progressive foundering of cylindrical blocks with limited internal deformation as revealed by the synsedimentary subsidence recorded by their Miocene sedimentary fill. This subsidence mechanism is more compatible with interstratal dissolution of evaporites than karstification and cave development in limestone formations. (2) The dimensions and deformation style of the palaeosinkholes are similar to those of other collapse structures related to deep-seated dissolution of salt-bearing evaporites. (3) The arcuate monocline associated with some of these collapse structures is also a characteristic feature of subsidence related to dissolution of evaporites.\ud However, no major evaporite formations have been documented so far in the subsurface of the Malta Platform

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confidence: 85%

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confidence: 99%

New insights into the genesis of the Miocene collapse structures of the island of Gozo (Malta, central Mediterranean Sea)

Arnedo

Tonelli

Gutiérrez

et al. 2015

JGS

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“…Sanbaqi is a hydrothermal paleokarst deposit where the mineralization is located in cavities and fault-breccias formed by dissolution of carbonates. Four episodes of karst formation are recognized, and the main uranium mineralization is related to the second karst episode, with isotopic age of two pitchblende samples (main ore mineral) at 129 Ma and 134 Ma (Min et al 1997).…”

Section: Hydrothermal Karstic Deposition Of Collophanitesmentioning

confidence: 99%

A hydrothermal karst-hosted U-P deposit related to Pangea break-up: Itataia deposit, Borborema Province, Northeastern Brazil - a review

Cavalcanti¹,

Bessa²,

Santos³

et al. 2018

JGSB

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The Itataia U-P deposit holds the second largest uranium reserve in Brazil. All of the uranium is contained within the microcrystalline structure of fluorapatite, which is the ore mineral of the collophanite bodies. The main lithology that hosts the mineralization is marble, and the collophanite occurs as massive bodies, stockwork vein, breccia, filling vugs in episyenites, and disseminated in host rocks. This review shows that five important episodes in the Northern Borborema Province, leading to the consolidation of the Itataia U-P deposit: i) deposition of a phosphate-rich Neoproterozoic supracrustal quartz-pelite--carbonate sequence, represented by the Itataia Group; ii) building of the Neoproterozoic Tamboril-Santa Quitéria continental magmatic arc, responsible for the partial melting of the phosphate-rich supracrustal sequence; iii) Na-metasomatism related to Neoproterozoic/Cambrian-Ordovician post-collisional to anorogenic granitoids, which generated uranium-rich albitite, as well as barren episyenite bodies; iv) Cretaceous hydrothermal karstic event related to the generalized fracturing of the continental crust caused by the Pangea break-up and making possible the deposition of collophanites in the karstic features and vugs in episyenites; v) reworking of the collophanites with the deposition of breccia in paleokarstic features in the marble.

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“…A few intrusion-related uranium deposits, carbonaceous pelitic rock-hosted uranium deposits and carbonate palaeokarst-hosted uranium deposits are present in South China (e.g., Min, 1995;Min et al, 1997Min et al, , 1999. Rare metals and REE deposits are also associated with Yanshanian granitoid magmatism in the South China region (e.g., Yin et al, 1995).…”

Section: Antimony and Uranium Depositsmentioning

confidence: 99%