| Seafloor Massive Sulphides from Semyenov-2 Hydrothermal Field, _Mid_-Atlantic Ridge Anna Firstova 1,2, *, Tamara...Irina Poroshina 1 1 2 * Institute for Geology and Mineral Resources of the Ocean (FSBI “VNIIOkeangeologia”)...Abstract: The Semyenov-2 hydrothermal field located at 13◦ 310 N of the _Mid_-Atlantic Ridge (MAR) is associated...associated with an oceanic core complex (OCC) and hosted by peridotites and basalts with minor amounts...high-temperature chalcopyrite (~350 ◦ C); electrum (AuAg)1 , hessite (Ag2 Te) and altaite (PbTe) are related to mediumand |
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Fuchs, Sebastian, Hannington, Mark D., Petersen, Sven (2019) Divining gold in seafloor polymetallic massive sulfide systems. Mineralium Deposita, 54 (6) 789-820 doi:10.1007/s00126-019-00895-3 |
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| Accepted: 6 May 2019 # The Author(s) 2019 Abstract Hydrothermal fluids on the modern seafloor are important... in part reflecting strong buffering of the hydrothermal fluids by their host rocks. Geochemical reaction-path...modeling shows that in most cases the investigated hydrothermal fluids are undersaturated with gold and silver...Precipitation of gold during conductive cooling of _mid_-ocean ridge black smoker (MOR) fluids occurs at low temperatures...ultramafic-dominated (UM) systems, the strongly reduced hydrothermal fluids promote the deposition of gold at higher |
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