Zobrazeno 1 - 10 of 102 pro vyhledávání: '"Porcellanite"'
1
Akademický článek
Sulphide Globules in a Porcellanite–Buchite Composite Xenolith from Stromboli Volcano (Aeolian Islands, Southern Italy): Products of Open-System Igneous Pyrometamorphism
Autor: Alberto Renzulli, Marco Taussi, Frank J. Brink, Stefano Del Moro, Richard W. Henley
Publikováno v: Minerals, Vol 11, Iss 6, p 639 (2021)
Pyrometamorphism is the highest temperature end-member of the sanidinite facies (high-temperature, low-pressure contact metamorphism) and comprises both subsolidus and partial melting reactions which may locally lead to cryptocrystalline-glassy rocks
Externí odkaz: https://doaj.org/article/118a19f230724dc59c8cd8b921803041
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2
Akademický článek
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3
Akademický článek
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4
The 'Lower Kaimur Porcellanite' (Vindhyan Supergroup) is of Sedimentary Origin and not Tuff
Autor: M.E. Bickford, Abhijit Basu, Subir Kumar Sarkar, Juergen Schieber, Adrita Choudhuri
Publikováno v: Journal of the Geological Society of India. 95:17-24
The ‘Lower Kaimur Porcellanite’ from the Proterozoic Vindhyan Supergroup (∼1700–900? Ma) is not only a chronostratigraphic marker but also an indicator of the tectonic setting of the basin. A few other silicified shaly units (porcellanites) f
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::0cee57cc5a1ccc1653fe7b24904c3250
https://doi.org/10.1007/s12594-020-1382-7
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5
Evidences of felsic volcanism and hydrothermal activities from clays associated with the Palaeoproterozoic Porcellanite Formation of the Vindhyan Supergroup, Central India
Autor: G. Mageswarii, Sucharita Pal, J. P. Shrivastava, Meenal Mishra
Publikováno v: Geochemistry. 79:408-420
Chemico-mineralogical attributes of authigenic clays associated with the altered volcanic tuffs that occur in the Palaeoproterozoic Porcellanite Formation contain evidences of hydrothermal alteration and diagenetic processes in a marine environment.
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::98c6a230b37f6004146e67a671c6ce85
https://doi.org/10.1016/j.geoch.2019.02.002
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6
Sulphide globules in a porcellanite-buchite composite xenolith from Stromboli Volcano (Aeolian Islands, Southern Italy): Products of open-system igneous pyrometamorphism
Autor: Richard W. Henley, Stefano Del Moro, Marco Taussi, Frank Brink, Alberto Renzulli
Publikováno v: Minerals, Vol 11, Iss 639, p 639 (2021)
Minerals
Volume 11
Issue 6
Pyrometamorphism is the highest temperature end-member of the sanidinite facies (high-temperature, low-pressure contact metamorphism) and comprises both subsolidus and partial melting reactions which may locally lead to cryptocrystalline-glassy rocks
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ef1fc7ca642252570d9168356f1fb959
https://hdl.handle.net/11576/2689542
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7
U-Pb Age and Chemical Composition of an Ash Bed in the Chopan Porcellanite Formation, Vindhyan Supergroup, India
Autor: M.E. Bickford, Meenal Mishra, Abhijit Basu
Publikováno v: The Journal of Geology. 126:553-560
We report a newly determined age (1647±18 Ma) for a rare magmatic zircon extracted from a very fine-grained felsic ash bed in the type area of the Porcellanite Formation, Vindhyan Supergrou...
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::4c47ace64a8554c80d2e80797e7a1041
https://doi.org/10.1086/698821
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8
Felsic Xenocryst in the Bedded Porcellanite (Mesoproterozoic) of the Central India: An Evidence Suggesting the Rhyolitic Source of Silica
Autor: null Krishna Mondal, null B. P. Singh
Publikováno v: Global Journal of Earth Science and Engineering. 4:18-26
The Mesoproterozoic porcellanite of the Vindhyan Super group is the oldest porcellanite deposit of India. Its origin is poorly understood in the absence of silica secreting organisms during Proterozoic times and earlier. Here, we interpret the origin
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::c0c33f020ba279d74dcd3f8f16e07f35
https://doi.org/10.15377/2409-5710.2017.04.3
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9
Silcrete: an Australian perspective
Autor: Richard A. Eggleton, G. Taylor
Publikováno v: Australian Journal of Earth Sciences. 64:987-1016
We know how most rocks are formed. Silcrete is something of an enigma, for although there are many interpretations of the origins of individual silcrete bodies, such as those in the Paris Basin, England, Botswana and central Australia, an overarching
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::3214c413008be1f72372414d24815f8a
https://doi.org/10.1080/08120099.2017.1318167
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Petrological study of the early Mesoproterozoic Glauconitic Sandstone and Olive Shale members from the Semri Group, Vindhyan Supergroup in Central India: Implications to input from intrabasinal felsic volcanic source and glauconitization
Autor: Shinjana Sen, Meenal Mishra
Publikováno v: Geological Journal. 53:857-876
The Semri Group of the Vindhyan Supergroup contains widespread intrabasinal felsic volcanic rocks in the Porcellanite Formation formed during the early Mesoproterozoic. This widespread felsic volcanism was followed by the deposition of siliciclastic
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::23975814f46645510e2dbf9bd877e4c1
https://doi.org/10.1002/gj.2931
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