Por favor, use este identificador para citar o enlazar a este item:
http://hdl.handle.net/10261/206642
COMPARTIR / EXPORTAR:
SHARE CORE BASE | |
Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL | DATACITE | |
Título: | Recent Mn-Ag deposits in coastal hydrothermal springs in the Baja California Peninsula, Mexico |
Autor: | Rodríguez-Díaz, A. A.; Canet, C.; Villanueva-Estrada, R. E.; Chacón, Enrique CSIC ORCID; Gervilla, Fernando CSIC ORCID; Velasco-Tapia, F.; Cruz-Gámez, E.M.; González Partida, Eduardo; Casas-García, R.; Linares-López, C.; Pérez-Zárate, D. | Palabras clave: | Acanthite Gulf of California Hot spring mineralization Mn-stromatolites Native silver Todorokite |
Fecha de publicación: | 1-ene-2019 | Editor: | Springer Nature | Citación: | Mineralium Deposita 54 (6): 849-866 (2019) | Resumen: | Hot springs with associated Mn-Ag mineralization were identified in the intertidal zone of the Bahia Concepcion Bay of the central-eastern Baja California Peninsula. Hot spring activity is related to a system of NW-SE faults that are associated with the opening of the Gulf of California. The hot springs are hosted by Miocene volcanic and volcaniclastic units of the Comondu Group. The maximum discharge temperature recorded is 72 °C, with the pH ranging from 6.2 to 6.5 and salinity values reaching up to 27 g/kg. Veins, stockworks, breccias, crusts, and organosedimentary stromatolites of silica-carbonate and Mn oxides are associated with the hot springs. The Mn oxide and silica deposits show an association with Ag, As, Ba, Ca, Cu, Mg, Pb, Sb, Sr, Tl, V, W, and Zn. Acanthite and native silver occur along with pyrite in a mineral assemblage rich in opal-A, todorokite, romanechite, aragonite, high-Mg calcite, and barite. Three distinct mineral associations characterized by sulfides, sulfates, and oxides are recognized. The silver minerals formed late in the paragenesis. Textural evidence suggests a microbial mediation for the Mn mineral deposition. Pourbaix diagrams for Mn and Ag species were constructed for the physicochemical conditions of the coastal hot springs. These diagrams show that both Mn and Ag minerals are stable at low temperature (65 °C), and near neutral pH, under slightly reducing or oxidizing conditions. The characteristics of the subaerial to shallow submarine hot springs and the results of the geochemical modeling suggest that the hydrothermal system in the Bahia Conception Bay is formed through convection of meteoric waters, intermixed with some saline fluids or seawater. | Versión del editor: | http://dx.doi.org/10.1007/s00126-018-0846-9 | URI: | http://hdl.handle.net/10261/206642 | DOI: | 10.1007/s00126-018-0846-9 | Identificadores: | doi: 10.1007/s00126-018-0846-9 issn: 0026-4598 |
Aparece en las colecciones: | (IACT) Artículos |
Ficheros en este ítem:
Fichero | Descripción | Tamaño | Formato | |
---|---|---|---|---|
accesoRestringido.pdf | 14,53 kB | Adobe PDF | Visualizar/Abrir |
CORE Recommender
SCOPUSTM
Citations
8
checked on 20-abr-2024
WEB OF SCIENCETM
Citations
9
checked on 26-feb-2024
Page view(s)
145
checked on 29-abr-2024
Download(s)
25
checked on 29-abr-2024
Google ScholarTM
Check
Altmetric
Altmetric
NOTA: Los ítems de Digital.CSIC están protegidos por copyright, con todos los derechos reservados, a menos que se indique lo contrario.