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Semenov-2 hydrothermal field

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Journal Article
Journal: Economic Geology
Published: 01 June 2017
Economic Geology (2017) 112 (4): 741-773.
... proposed for the Cu-and Au-rich massive sulfides from the Brothers volcano, Kermadec arc, and for other arc-hosted hydrothermal systems ( de Ronde et al., 2011 ; Berkenbosch et al., 2012 ). The Cu-Zn–rich massive sulfides from the mafic-hosted Semenov-2 hydrothermal field, Mid-Atlantic Ridge...
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Journal Article
Published: 01 April 2016
Mineralogical Magazine (2016) 80 (2): 337-346.
...Igor V. Pekov; Nikita V. Chukanov; Dmitry A. Varlamov; Dmitry I. Belakovskiy; Anna G. Turchkova; Panagiotis Voudouris; Athanassios Katerinopoulos; Andreas Magganas Abstract A new tsumcorite-group mineral, nickeltsumcorite, Pb(Ni,Fe 3+ ) 2 (AsO 4 ) 2 (H 2 O,OH) 2 , the Ni-dominant analogue...
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Journal Article
Published: 01 June 2008
The Canadian Mineralogist (2008) 46 (3): 545-567.
..., sulfide breccias and mineralized peridotite. F ig . 1. Schematic geological map of the Ashadze hydrothermal field (after Beltenev et al. 2004 ). Patterns: 1 ore accumulations, 2 debris of massive sulfides, 3 metalliferous sediments, 4 serpentinized peridotites, 5 carbonate sediments, 6 supposed...
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Image
Geologic scheme of the <b>Semenov</b> <b>hydrothermal</b> cluster in the Central Atlantic...
Published: 01 June 2017
Fig. 1. Geologic scheme of the Semenov hydrothermal cluster in the Central Atlantic (a) and of the Semenov-2 hydrothermal field (b), simplified from unpublished PMGE open-file reports ( PMGE, 2007 , 2009 ).
Journal Article
Published: 01 December 2017
American Mineralogist (2017) 102 (12): 2484-2493.
... 3 O 8 + NaCl = Na 4 Al 3 Si 9 O 24 Cl]. (2) The hydrothermal equivalent described by H 2 O + Na 4 Al 3 Si 9 O 24 Cl = 3NaAlSi 3 O 8 + liquid, where the liquid is assumed to be a saline-rich hydrous-silicate melt. Experiments were performed using a piston-cylinder press and internally heated gas...
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Journal Article
Journal: Economic Geology
Published: 01 November 2016
Economic Geology (2016) 111 (7): 1595-1618.
... of metasomatic alteration by hydrothermal fluids. In a total alkali versus silica diagram (TAS) after Le Bas et al. (1986) , data for the footwall samples from Kiirunavaara plot within the trachyandesite field, whereas those for the hanging-wall samples and host rock from Tuolluvaara and footwall from Nukutus...
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Journal Article
Published: 01 February 2000
The Canadian Mineralogist (2000) 38 (1): 81-100.
... minerals are quartz, orthoclase, plagioclase, and biotite. Amphibole is present in only a few samples, and in smaller proportions than biotite (1:2 or less). Additional minerals identifiable in the field were allanite, purple or green fluorite (in veins), and chlorite. In thin section, quartz abundance...
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Journal Article
Published: 01 December 2016
American Mineralogist (2016) 101 (12): 2620-2637.
... production of about 500 000 metric tons. The hydrothermally altered porphyry of the Salvadora stock in Llallagua is part of the Bolivian Tin Belt situated in the Andes Mountains. Based on SiO 2 -Zr/TiO 2 discrimination plots, the stock was likely of a dacitic to rhyodacitic composition ( Dietrich et al...
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Journal Article
Journal: Geology
Published: 01 July 2017
Geology (2017) 45 (7): 667-670.
... ). Hydrothermally altered rocks represent input from two reservoirs: unaltered silicate rock and meteoric water. A regression line drawn through an array of analyses of hydrothermally altered rocks represents a mixing line between unaltered rock and original meteoric water ( Fig. 2 ). Because metamorphism...
FIGURES
Journal Article
Journal: Geosphere
Published: 01 April 2014
Geosphere (2014) 10 (2): 308-339.
... in the proximity of the intrusions ( Fig. 2 ), which are similar to trends observed around shallow intrusions in modern meteoric-hydrothermal systems ( Taylor, 1974 ). A feature of aluminoferrous Karelian rocks ( Fig. 3 ) is that the maximum level of 18 O depletion is also characterized by the highest...
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Series: Reviews in Economic Geology
Published: 01 January 2000
DOI: 10.5382/Rev.13.08
EISBN: 9781629490205
... alteration predominates in felsic rocks, whereas sericite + carbonate + K feldspar assemblages predominate in mafic-intermediate rocks. Hydrothermal quartz and acid styles of alteration are poorly developed or absent. Field, geochemical, and petrological evidence indicates that these deposits form...
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Journal Article
Journal: Economic Geology
Published: 01 December 2014
Economic Geology (2014) 109 (8): 2129-2158.
... of magmatic gases is highlighted, for instance, by the discovery of sites venting highly acidic hydrothermal fluids, unusually gas-rich vent sites discharging liquid CO 2 , the occurrence of native sulfur lakes, and the release of sulfur-rich hydrothermal plumes during submarine volcanic eruptions ( Embley et...
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Comparison of median contents of major (SiO <b>2</b> , Cu, Zn, wt %) and trace (Sr...
Published: 01 June 2017
Fig. 11. Comparison of median contents of major (SiO 2 , Cu, Zn, wt %) and trace (Sr, Mn, Co, Ni, Cd, Mo, Sn, Pb, As, Sb, Se, Au, Ag, ppm) elements in Cu-Zn massive sulfides from the Semenov-2 hydrothermal field and Mid-Atlantic Ridge mafic- and ultramafic-hosted hydrothermal fields.
Journal Article
Published: 01 April 2008
The Canadian Mineralogist (2008) 46 (2): 361-378.
... in titanite and the absence of associated sulfides, suggest transport of these high-field-strength elements (HFSE) by F-rich and S-poor hydrothermal fluids unrelated to the fluids that formed the older Fe–Pb–Zn–Ag sulfide ores of the Sullivan deposit. Fluids containing abundant REE, HFSE, and F may have been...
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Journal Article
Published: 01 February 2007
Mineralogical Magazine (2007) 71 (1): 1-16.
... Astrophyllite K 2 Na(Fe 2+ ,Mn) 7 Ti 2 Si 8 O 26 (OH) 4 F Woodrow (1967) Kupletskite K 2 Na(Mn,Fe 2+ ) 7 (Ti,Nb) 2 Si 8 O 26 (OH) 4 F Semenov (1956) Niobophyllite K 2 Na(Fe 2+ ,Mn) 7 (Nb,Ti) 2 Si 8 O 26 (OH) 4 (F,O) Nickel et al. (1964) Cesium kupletskite (Cs,K) 2 Na(Mn,Fe,Li) 7 (Ti,Nb...
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Journal Article
Published: 01 May 2001
European Journal of Mineralogy (2001) 13 (3): 521-532.
...) 2 . In nature, such X-site vacant Al-rich tourmalines would be expected to occur in Al-rich and (Mg, Fe)-, Ca- and alkali-free products of hydrothermal systems or of wall-rock alterations, or in their metamorphic equivalents such as dumortierite quartzites. An unusually Al-rich, complex tourmaline...
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Journal Article
Published: 01 June 2005
The Canadian Mineralogist (2005) 43 (3): 965-972.
... (Aeg). The field of view covers 2 × 1.2 mm. Pautovite occurs as crudely prismatic to acicular crystals ( Figs. 2a, b ) up to 120 μm long and up to 5 μm (rarely up to 15 μm) thick. Twinning was not observed. The crystals are generally slightly curved and split. By analogy with rasvumite...
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Journal Article
Published: 01 August 2011
The Canadian Mineralogist (2011) 49 (4): 947-965.
... the hydrothermal stage. § E-mail address : jindrak@email.cz 28 2 2010 27 8 2011 © The Mineralogical Association of Canada 2011 Dans sa partie occidentale, le complexe de Khan Bogd, dans le sud du désert de Gobi, du sud de la Mongolie, contient, dans l’ordre de mise en place, un...
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Series: Investigations in Geophysics
Published: 01 January 2002
DOI: 10.1190/1.9781560802068.ch3
EISBN: 9781560802068
.... The example of a local approach is magnetotelluric sounding, or MTS , using algebraic relationships between tangential components of the electric and magnetic fields. The MTS method is applied for studies of vast oil and gas prospective areas and to the search for hydrothermal resources of energy, in ore...
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Journal Article
Published: 01 June 2007
The Canadian Mineralogist (2007) 45 (3): 451-456.
... and titanite ( Semenov 1972 , Pekov 2000 , our data). Contacts between all zones are gradational. Around the vein, the host-rock lujavrite is metasomatically altered to poikilitic nepheline syenite and microclinite (up to 6 m wide). F ig . 2. Natrolite – aegirine – orthoclase vein in lujavrite, Mt...
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