Kyanite-bearing anatectic metapelites from the Eastern Himalayan Syntaxis, Eastern Tibet, China : textural evidence for partial melting and phase equilibria modeling
نویسندگان
چکیده
منابع مشابه
Clockwise Rotation of Upper-Mantle Strain and Crust-Mantle Coupling Beneath the Eastern Syntaxis Tibet
AB: We performed shear-wave splitting of core phases using a subset of 33 selected events within an array composed of 48 broadband stations that spans a 650x350 km area crossing the Lhasa and the southern part of the Qiangtang terranes. Our results reveal the presence of azimuthal anisotropy with small-to-moderate delay times (0.5-1.4s). The consistency of the splitting parameters with respect ...
متن کاملTiming of granulite-facies metamorphism in the eastern Himalayan syntaxis and its tectonic implications
We present geochronological evidence in the eastern Himalayan syntaxis (Namche Barwa) for high-pressure (HP) granulite-facies metamorphism and explain its importance for understanding both the deep continental subduction of the Indian plate beneath Asia and its subsequent exhumation. The timing of peak and retrograde metamorphism in part constrains these processes but is debated. We present zir...
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High-grade gneisses (amphibolite–granulite facies) of the Namche Barwa and Gyala Peri massifs, in the eastern Himalayan syntaxis, have been unroofed from metamorphic depths in the late Tertiary–Recent. Rapid exhumation (2–5 mm year) has resulted in a pronounced shallow conductive thermal anomaly beneath the massifs and the intervening Tsangpo gorge. The position of the 300 !C isotherm has been ...
متن کاملPhase relations and reaction histories of chloritoid-free and chloritoid-bearing metapelites from the Mahneshan area, NW Iran
Mineral assemblages, reaction textures and mineral composition of the metapelitic rocks from the Mahneshan area in NW Iran are studied to reconstruct the reaction history of the rocks. The phase relation on the real mineral chemistry AFM, AFMn compatibility diagrams and mineral isograds in chloritoid-free and chloritoid-bearing metapelites of Mahneshan Complex were studied in order to determine...
متن کاملA new species of Buprestis subgenus Akiyamaia from South-Eastern Tibet, China (Coleoptera: Buprestidae: Buprestini).
Buprestis (Akiyamaia) intercostata sp. n. is described from Chayu, south-eastern Tibet. It is characterized by the presence of three additional longitudinal carinae inserted between the elevated suture and the three normal costae commonly found on each elytron of the previously known species of Akiyamaia.
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ژورنال
عنوان ژورنال: Himalayan Journal of Sciences
سال: 1970
ISSN: 1727-5229,1727-5210
DOI: 10.3126/hjs.v5i7.1258