Zobrazeno 1 - 10 of 16 pro vyhledávání: '"Marc Brouand"'
1
Cenozoic oxidation episodes in West Africa at the origin of the in situ supergene mineral redistribution of the primary uranium orebodies (Imouraren deposit, Tim Mersoï Basin, Northern Niger)
Autor: Marc Brouand, Michel Cathelineau, Rémi Schmitt, Marah Mamane Mamadou, Etienne Deloule
Publikováno v: Mineralium Deposita
Mineralium Deposita, Spinger, 2020, 55 (7), pp.1333-1352. ⟨10.1007/s00126-019-00945-w⟩
International audience; Uranium (U) deposits can undergo oxidizing events, subsequent to which the U may be redistributed or precipitated under distinct mineralogical forms. Occurrences of U6+ minerals can be the result of either (i) in situ oxidatio
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::77c5647c27a19ae65e72b3e952b5bcd0
https://doi.org/10.1007/s00126-019-00945-w
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2
Conditions for uranium biomineralization during the formation of the Zoovch Ovoo roll-front-type uranium deposit in East Gobi Basin, Mongolia
Autor: Dimitrios Rallakis, Michel Cathelineau, Olivier Parize, Raymond Michels, Marc Brouand
Publikováno v: Ore Geology Reviews
Ore Geology Reviews, Elsevier, 2021, 138, pp.104351. ⟨10.1016/j.oregeorev.2021.104351⟩
International audience; The Zoovch Ovoo uranium roll-front-type deposit is hosted in the Sainshand Formation, a Late Cretaceous siliciclastic reservoir, which constitutes the upper part of the post-rift infilling of the Mesozoic East Gobi Basin in SE
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::99162874536e1fa0902d9a2f7ba56e12
https://hal.univ-lorraine.fr/hal-03359300
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4
Uranium deposits of Franceville basin (Gabon): Role of organic matter and oil cracking on uranium mineralization
Autor: Andreï Lecomte, Michel Cathelineau, Raymond Michels, Christophe Morlot, Marc Brouand, Nicolas Flotté
Publikováno v: Ore Geology Reviews
Ore Geology Reviews, Elsevier, 2020, 123, pp.103579. ⟨10.1016/j.oregeorev.2020.103579⟩
The lower Proterozoic uranium deposits in the Franceville basin (Gabon) are mainly known to have hosted natural nuclear reactors. However, this basin also witnessed a former petroleum system which shows major occurrences of uranium ores associated wi
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ca02688264276d4b93936b030cc33353
https://hal.archives-ouvertes.fr/hal-02861042
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5
Evaluation of rammelsbergite (NiAs2) as a novel mineral for 187Re-187Os dating and implications for unconformity-related U deposits
Autor: Catherine Zimmermann, Laurie Reisberg, Olivier Rouer, Julien Mercadier, Amber Doney, Lise Salsi, Béatrice Luais, Andreï Lecomte, Stepan M. Chernonozhkin, Patrick Ledru, Marc Brouand, Christophe Morlot
Publikováno v: Geochimica et Cosmochimica Acta
Geochimica et Cosmochimica Acta, Elsevier, 2020, 280, pp.85-101. ⟨10.1016/j.gca.2020.04.011⟩
Rammelsbergite (NiAs2) is often present in ore deposits worldwide in association with other arsenides, sulphides and sulfarsenides. This work demonstrates the value of the application of the Re-Os isotopic system to the dating of rammelsbergite. Usin
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::efcf55203c5e6544947d15a6b280cefe
https://hal.univ-lorraine.fr/hal-02970170
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6
Uranium mineralization in the Alum Shale Formation (Sweden): Evolution of a U-rich marine black shale from sedimentation to metamorphism
Autor: Raymond Michels, Andreï Lecomte, Marc Brouand, Chantal Peiffert, Michel Cathelineau
Publikováno v: Ore Geology Reviews
Ore Geology Reviews, Elsevier, 2017, 88, pp.71-98. ⟨10.1016/j.oregeorev.2017.04.021⟩
International audience; The Alum Shale Formation is a metal-rich black shale, deposited on the Baltoscandian platform between Middle Cambrian and Early Ordovician. These black shales may be of particular economic interest for their relatively high ur
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8320a5d68d6b8253bc73e4bfb9b8c191
https://doi.org/10.1016/j.oregeorev.2017.04.021
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7
Ilmenites and their alteration products, sinkholes for uranium and radium in roll-front deposits after the example of South Tortkuduk (Kazakhstan)
Autor: Philippe Lach, Etienne Deloule, Michel Cathelineau, Nicolas Fiet, Thomas Boulesteix, Herve Toubon, Marc Brouand
Publikováno v: Journal of Geochemical Exploration
Journal of Geochemical Exploration, Elsevier, 2019, 206, ⟨10.1016/j.gexplo.2019.106343⟩
International audience; The approximate determination of average Ra/U disequilibria in orebodies is one of the most common causes of errors in U reserve estimations. In roll-front deposits, the disequilibria are however frequently distributed followi
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::289d3c56cb5ffc9776924ce193ec6182
https://hal.archives-ouvertes.fr/hal-02380982
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8
Hot Fluid Flows Around A Major Fault Identified By Paleothermometric Studies (Tim Mersoï Basin, Niger)
Autor: Marc Brouand, Franck Bourdelle, Agnès Elmaleh, Marie-Christine Boiron, Marah Mamane Mamadou, Michel Cathelineau
Publikováno v: Journal of Sedimentary Research. 86:914-928
Faults are mostly considered as low-permeability zones due to their frequent sealing, but they can also contribute significantly to fluid movements in sedimentary basins, and subsequently to temperature anomalies. In favorable cases, paleo-temperatur
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::3dc93f368afe6656dd78e5e7b1516056
https://doi.org/10.2110/jsr.2016.62
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9
Dolomite cements in Cenomanian continental sand deposits: Time evolution and significance (Zoovch Ovoo U-deposit, East Gobi Basin, Mongolia)
Autor: Raymond Michels, Olivier Parize, Marc Brouand, Michel Cathelineau, Dimitrios Rallakis
Publikováno v: Sedimentary Geology
Sedimentary Geology, Elsevier, In press, pp.105688. ⟨10.1016/j.sedgeo.2020.105688⟩
International audience; Shallow buried unconsolidated sands generally provide very little information about diagenesis as most detrital minerals remain unchanged. However, in rare cases carbonate cemented nodules or sandstone layers may occur inside
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c81654f004cf4b2b86a043fe31202bb6
https://doi.org/10.1016/j.sedgeo.2020.105688
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10
In-situ Isotopic and Chemical Study of Pyrite from Chu-Sarysu (Kazakhstan) Roll-front Uranium Deposit
Autor: Michel Cathelineau, Nicolas Fiet, Philippe Lach, Marc Brouand
Publikováno v: Procedia Earth and Planetary Science. 13:207-210
Pyrite is common in roll-front type uranium deposit in Chu-sarysu basin, Kazakhstan. Combined in-situ microstructural, isotopic and chemical analysis of pyrite indicates variation in precipitation conditions and in fluid composition. Broad-scale δ 3
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0567c4ab2dc30bafe2a3ff67fcd055e5
https://doi.org/10.1016/j.proeps.2015.07.049
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