Browsing PANGAEA by Subject "Thorium"
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Browsing PANGAEA by Subject "Thorium"
Now showing items 1-18 of 18
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(PANGAEA, 2001-10-13)Rare-metal alkali (quartz-feldspathic) metasomatites are considered in terms of their geologic position, structure, and composition. Their petrochemical and geochemical characteristics are given. In the Polar Urals, the ...
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(PANGAEA, 2004-07-05)
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(PANGAEA, 2007-11-05)Early Cretaceous volcanic rocks of the Mariisky sequence and Early Cenozoic extrusive-vent rocks of the Mary Cape are exposed at the most northwest of the Schmidt Peninsula, North Sakhalin. In chemical composition, all the ...
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(PANGAEA, 1998-03-15)
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(PANGAEA, 2007-09-29)Middle Cenozoic evolution of magmatism in the Schmidt Peninsula between 37 and 25 Ma began with eruptions of subalkaline and moderately alkaline andesite, latite, trachyandesite, and trachyrhyolite lavas and ended with ...
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(PANGAEA, 2011-08-31)
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(PANGAEA, 2011-02-12)High-pressure/low-temperature metabasites occupy a definite geological position within the structure of the Polar Urals and have a very important bearing on the understanding of the early history of the Ural Mountains. ...
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(PANGAEA, 1987-06-16)
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(PANGAEA, 2000-04-17)We present the initial results of a U-Th-Pb zircon ion-microprobe investigation on samples from the Central Belt of Taimyr, in order to constrain its tectono-magmatic evolution. The zircon samples are from a deformed twomica ...
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(PANGAEA, 1987-06-18)
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(PANGAEA, 2012-10-09)Reconstruction of the geologic history of the Yenisey Ridge, which developed as an accretionary collision orogen on the western margin of the Siberian craton is essential to understanding the evolution of mobile belts ...
Now showing items 1-18 of 18