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2017
- handle: 10670/1.imnrkx
- Jébrak, Michel; Lebrun, Charline; André-Mayer, Anne-Sylvie et Simard, Marjorie (2017). « Native antimony emplaced by methane-rich hydrothermal fluid in an orogenic fault-zone ». Terra Nova, 29, pp. 401-408.
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http://archipel.uqam.ca/14393/
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DOI: 10.1111/ter.12300
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Gold Antimony Archean ore deposit QuebecSujets proches
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Michel Jébrak et al., « Native antimony emplaced by methane-rich hydrothermal fluid in an orogenic fault-zone », UQAM Archipel : articles scientifiques, ID : 10670/1.imnrkx
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Résumé
Antimony-rich gold deposits represent a subclass of orogenic hydrothermal systems. The study of the Lapa gold deposit in the Abitibi greenstone belt shows that antimony occurs during two different stages: (1) as early prograde Sb–Ni disseminated sulphides in talc schists, associated with CO2-bearing fluids, and (2) as a late native antimony association, associated with methane-bearing fluids indicating a reducing environment. Methane could be related to the serpentinization of the ultramafic rocks of the Pich�e Group hosting the Lapa deposit. Several deposits display the same methane antimony association along fault zones.