23.05.2021 | History

2 edition of Magmatic contributions to hydrothermal systems found in the catalog.

Magmatic contributions to hydrothermal systems

extended abstracts of the Japan-U.S. Seminar on Magmatic Contributions to Hydrothermal Systems, held at Kagoshima and Ebino, November, 1991 and The behavior of volatiles in magma : abstracts of the 4th Symposium on Deep-crustal Fluids The behavior of Volatiles in Magma, held at Tsukuba, November, 1991

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Published by Administrator in Geological Survey of Japan

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    • Geological Survey of Japan

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        StatementGeological Survey of Japan
        PublishersGeological Survey of Japan
        LC Classifications1992
        The Physical Object
        Paginationxvi, 68 p. :
        Number of Pages62
        ID Numbers
        ISBN 10nodata
        2no. 279.
        3Report (Chishitsu Chōsajo (Japan)) ;

        nodata File Size: 4MB.

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Magmatic contributions to hydrothermal systems by Geological Survey of Japan Download PDF EPUB FB2

More recently, some epidosites were shown to precipitate into a newly-formed porosity, interpreted to form by dissolution of primary magmatic diabase by black-smoker hydrothermal fluid.

Circulation of seawater at oceanic spreading centers extracts heat, drives rock alteration, and transports leached metals to shallower levels of the crust, where they may precipitate and form ore deposits.

Geologie de la France, 1, p. From magmatic to hydrothermal Sn-Li-Nb-Ta-W mineralization: the Argemela District Portugal.


Again as fluids rise, their chemistry changes and they descend when cooled, as bicarbonate, oxygenated or acidic fluids. Speciation diagrams, therefore, chart the different hydrolysis species of a metal cation and their abundance as determined by the solution pH. Recent analytical and technological developments, new Magmatic contributions to hydrothermal systems and experimental data and improved numerical models offer new perspectives for understanding of and exploration for porphyry systems.

A regional synthesis demonstrates coherent patterns in the style of magmatism and Cu mineralization which are analogous to those in the Tucson area. TIMS—whole grain strontium isotope ratio For strontium isotope measurements, epidote separates 1. About Frontiers Research Topics With their unique mixes of varied contributions from Original Research to Review Articles, Research Topics unify the most influential researchers, the latest key findings and historical advances in a hot research area!

The high absolute skew angle of the observed data indicates that it is preferable to describe the subsurface in terms of 3D structure rather than 2D. Hence, the stratigraphic position of VMS deposits and the ratio of UPL:LPL affinity elements e.

Find out more on how to host your own Frontiers Research Topic or contribute to one as an author.Montel J-M, Marignac C.

Magmatic volatiles episodically flush oceanic hydrothermal systems as recorded by zoned epidote

The rootzone of an ancient hydrothermal system exposed in the Troodos ophiolite, Cyprus. With this model we suggest there were at least three types of fluids in circulation feeding the on-axis hydrothermal system of the Troodos oceanic crust—a modified seawater-derived fluid MS-typea magmatic fluid M-type and, a hydrothermal fluid H-type —possibly composed of the M- and MS-types, but most likely a seawater-derived rock-buffered fluid.

PEG 2013, 6th International Symposium on Granitic Pegmatites, Bartlett, New-Hampshire USA. Such brine and gas exsolved from a magma moves into the plastic region owing to the pressure difference between the magma and the surrounding fluid, which subjects it to a hydrothermal pressure gradient Fournier.

Vein-type mineralizations, both intragranitic and in country rocks, include amblygonite and cassiterite but also locally wolframite W.