Results 41 to 50 of about 220,175 (263)
Journal of the Geological Survey of Brazil, 2023 The Curral Novo Iron District, located in the center-east of the state of Piauí, is hosted in the Granjeiro Complex in its southwestern section, located in the Rio Piranhas-Seridó Domain, northern subprovince of Borborema Province. In this district, the
José Alberto Rodrigues do Vale +8 more
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Journal of Geophysical Research: Solid Earth, 2021 Fluid‐rock interaction in ultramafic rocks considerably affects the chemical and isotopic composition of the oceanic lithosphere. We present a geochemical and petrological study of serpentinites and ophicalcites of the Northern Apennine ophiolite, Italy.
E. Schwarzenbach +3 more
semanticscholar +1 more source
Mineralogical petrochemical and geochemical features of near ore metasomatism in the gold ore deposit "Verkhne-Sakukanskoye" (Northern Transbaikal Region) [PDF]
, 2006 Discussion in comparative aspect of the nature of geochemical fields in the mesothermal gold deposits formed in blacks and a crystal substratum is continued.
Kucherenko, I. V.
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Frontiers in Earth Science, 2023 The nephrite jade deposits of different tectonic units in China exert significant commercial quality, which have attracted wide attention. However, these deposits have not been systematically summarized to date.
Cun Zhang +6 more
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Fenites associated with carbonatite complexes : a review [PDF]
, 2017 This is the author accepted manuscript. The final version is available from Elsevier via the DOI in this record.Carbonatites and alkaline-silicate rocks are the most important sources of rare earth elements (REE) and niobium (Nb), both of which are ...
A.A. Finch +203 more
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Geophysical Monograph Series, Page 351-356., 2020 This book is Open Access. A digital copy can be downloaded for free from Wiley Online Library.
Explores the behavior of carbon in minerals, melts, and fluids under extreme conditions
Carbon trapped in diamonds and carbonate-bearing rocks in subduction zones are examples of the continuing exchange of substantial carbon ...
wiley +1 more source
Georesursy, 2021 A model of the activity of hydrothermal-metasomatic systems confined to certain structural elements is proposed in the present article. The model is based on the analysis of a large volume of traditional studies: measurements of porosity coefficients, permeability, pyrolytic measurements - together with specific measurements: isotopic composition of ...
G. A. Kalmykov +7 more
openaire +2 more sources
Frontiers in Earth Science, 2023 Tin-bearing magnetite is reported from several types of magmatic-hydrothermal ore deposits. The question of whether tin is incorporated within solid solution, as Sn4+, or as nanoinclusions remains open, however.
Jing Xu +7 more
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Yankuang ceshi, 2022 BACKGROUND Monazite is a common rare earth mineral and an important ore mineral in many rare earth deposits, while sulfur-containing monazite is relatively rare and is only found in a few carbonate rocks, kimberlites, and metamorphic rocks. OBJECTIVES To
YANG Shiping +6 more
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Back-reacted saponite in Jurassic mudstones and limestones intruded by a Tertiary sill, Isle of Skye [PDF]
, 2005 The Lón Ostatoin stream section, Trotternish Peninsula, Isle of Skye, exposes a sequence of Middle Jurassic mudstones and limestones which have been locally metasomatized by a transgressive sill of Tertiary age. Limestones in the sequence, including some
Alt +24 more
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