Results 31 to 40 of about 6,127 (162)

Mantle sources and magma evolution in Europe's largest rare earth element belt (Gardar Province, SW Greenland) : new insights from sulfur isotopes [PDF]

open access: yes, 2021
This work is a contribution to the HiTech AlkCarb project and was funded by the European Union's Horizon 2020 research and innovation programme under grant agreement No. 689909. W.H.
Borst, Anouk M.   +7 more
core   +4 more sources

The potential for photosynthesis in hydrothermal vents: a new avenue for life in the Universe? [PDF]

open access: yes, 2013
We perform a quantitative assessment for the potential for photosynthesis in hydrothermal vents in the deep ocean. The photosynthetically active radiation in this case is from geothermal origin: the infrared thermal radiation emitted by hot water, at temperatures ranging from 473 up to 673 K.
arxiv   +1 more source

Oxygen-isotope and trace element constraints on the origins of silica-rich melts in the subarc mantle [PDF]

open access: yes, 2007
Peridotitic xenoliths in basaltic andesites from Batan island in the Luzon arc contain silica-rich (broadly dacitic) hydrous melt inclusions that were likely trapped when these rocks were within the upper mantle wedge underlying the arc.
Eiler, J. M.   +4 more
core   +3 more sources

Internally heated porous convection: an idealised model for Enceladus' hydrothermal activity [PDF]

open access: yesarXiv, 2020
Recent planetary data and geophysical modelling suggest that hydrothermal activity is ongoing under the ice crust of Enceladus, one of Saturn's moons. According to these models, hydrothermal flow in the porous, rocky core of the satellite is driven by tidal deformation that induces dissipation and volumetric internal heating.
arxiv  

Regional-scale Metasomatism in the Fortescue Group Volcanics, Hamersley Basin, Western Australia: Implications for Hydrothermal Ore Systems [PDF]

open access: yesJournal of Petrology, 2014
Mafic to intermediate volcanic rocks of the Fortescue Group form the lowermost stratigraphic unit of the 100 000 km2 Hamersley Basin on the southern margin of the Archaean Pilbara Craton, Western Australia. These represent one of the oldest (2·8–2·7 Ga) known examples of a continental flood basalt sequence.
Raymond E. Smith   +3 more
openaire   +2 more sources

Contact Metamorphism in Southern California [PDF]

open access: yes, 1954
A highly condensed introduction to "Contact metamorphism in southern California" is obviously not the place in which to indulge in semantic niceties nor to engage in terminological tussles, and thus the title is not intended to reflect a carefully ...
Campbell, Ian
core  

ELEMENTS-IMPURITIES IN QUARTZ OF HYDROTHERMAL-METAMORPHIC AND HYDROTHERMAL-METAMORPHOGENIC-METASOMATIC GENESIS (SOUTH URALS)

open access: yesИзвестия Томского политехнического университета: Инжиниринг георесурсов, 2023
The relevance of the study is caused by the study and involvement of quartz-vein formations of various genetic types in the technological redistribution. Purpose: to determine the content of impurity elements in quartz of different genetic types and the degree of its suitability for obtaining high-purity quartz concentrates.
Maria A. Korekina, Alexander N. Savichev
openaire   +1 more source

Si-metasomatism in serpentinized peridotite: The effects of talc-alteration on strontium and boron isotopes in abyssal serpentinites from Hole 1268a, ODP Leg 209 [PDF]

open access: yes, 2014
Ultramafic rocks recovered from Hole 1268a, Ocean Drilling Program Leg 209, to the south of the 15°20′N Fracture Zone on the Mid-Atlantic ridge have experienced a complex history of melt depletion and subsequent interaction with a series of fluids under ...
Agostini, S   +4 more
core   +1 more source

Precise control on morphology of ultrafine LiMn2O4 nanorods as supercapacitor electrode via two-step hydrothermal method [PDF]

open access: yesCrystEngComm, 2018, Advance Article, 2018
We report three different synthesis routes while maintaining similar reaction conditions to choose an effective way to precisely control the growth of ultrafine one dimensional LiMn2O4 in the form of nanorods. We developed a novel method of mixing the precursors through hydrothermal, yielding low dimensional precursors for effective solid state ...
arxiv   +1 more source

Progressive carbonation and Ca-metasomatism of serpentinized ultramafic rocks: insights from natural occurrences and hydrothermal experiments [PDF]

open access: hybrid, 2023
Nomuulin Amarbayar   +8 more
openalex   +1 more source

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