Age, provenance and tectonic setting of the high-grade Jequitinhonha Complex, Araçuaí Orogen, eastern Brazil
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چکیده
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Tectonic setting of outer trench slope volcanism: pillow basalt and limestone in the Taconian orogen of eastern New York
The only pillow basalt in synorogenic sedimentary rocks at the exterior margin of the Taconic orogen in eastern North America is at Stark’s Knob in eastern New York. Earlier reported as extrusive into allochthonous Ordovician slope and rise facies, this small lens (ca. 125+ m long, 39 m thick) is a fault-bounded block in Upper Ordovician melange under the Taconian frontal thrust. Its N-MORB (no...
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Whole rock and tectonic setting of gneisses from the eastern Salmas (west of Urmia lake), NW Iran
The garnet calc-silicates at Baba-Nazar are located in the NE of Takab, Sanandaj- Sirjan zone. Anhedral to euhedral green colored garnets is a characteristic feature of these Calc-silicates. Mineral chemistry shows that garnets are Andradite- Grossular and contain more than 13% uvarovite. The high chromium content garnet, Cr-Spinel that have relatively Cr rich core than the rim, sulfide opaque ...
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ژورنال
عنوان ژورنال: Brazilian Journal of Geology
سال: 2016
ISSN: 2317-4889
DOI: 10.1590/2317-4889201620160012