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Michael W. Förster, Yannick Bussweiler, Dejan Prelevic, Nathan R. Daczko, Stephan Buhre, Regina Mertz-Kraus and Stephen F. Foley
Subduction of oceanic crust buries an average thickness of 300?500 m of sediment that eventually dehydrates or partially melts. Progressive release of fluid/melt metasomatizes the fore-arc mantle, forming serpentinite at low temperatures and phlogopite-b...
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Vittorio Scribano and Serafina Carbone
Geochemical characteristics of middle ocean ridge basalts (MORBs) testify partial melting of spinel-peridotite mixed with a few amounts of garnet-pyroxenite. The latter can be considered either autochthonous products of the crystallization of partial mel...
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Alessandra Correale, Vittorio Scribano and Antonio Paonita
Ultramafic magmas (MgO = 18 wt%) are generally thought to be primary mantle melts formed at temperatures in excess of 1600 °C. Volatile contents are expected to be low, and accordingly, high-Mg magmas generally do not yield large explosive eruptions. How...
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Ikuya Nishio, Tomoaki Morishita, Kristofer Szilas, Graham Pearson, Ken-Ichiro Tani, Akihiro Tamura, Yumiko Harigane and Juan Miguel Guotana
A titanian clinohumite-bearing dunite was recently found in the Ulamertoq ultramafic body within the 3.0 Ga Akia Terrane of southern West Greenland. Titanian clinohumite occurs as disseminated and discrete grains. Titanian clinohumite contains relatively...
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Panagiota P. Giannakopoulou, Petros Petrounias, Aikaterini Rogkala, Basilios Tsikouras, Panagiotis M. Stamatis, Panagiotis Pomonis and Konstantin Hatzipanagiotou
This case study investigates the influence of the mineralogical composition of ultramafic rocks derived from two ophiolite complexes from Greece (Veria-Naousa and Gerania) on their mechanical, physical and physicochemical properties. The investigated lit...
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Juan Miguel Guotana, Tomoaki Morishita, Ryoko Yamaguchi, Ikuya Nishio, Akihiro Tamura, Kenichiro Tani, Yumiko Harigane, Kristoffer Szilas and D. Graham Pearson
Peridotites occur as lensoid bodies within the Mesoarchaean orthogneiss in the Akia terrane of Southern West Greenland. The Ulamertoq peridotite body is the largest of these peridotites hosted within the regional orthogneiss. It consists mainly of olivin...
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Panagiotis Pomonis and Andreas Magganas
Cr-spinels from ultramafic rocks from Lokris (Megaplatanos and Tragana), and Beotia (Ypato and Alyki) ophiolitic occurrences were studied. These rocks comprise principally harzburgite with minor dunite. Small amounts of clinopyroxene-rich harzburgite and...
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Christina Stouraiti, Iakovos Pantziris, Charalampos Vasilatos, Christos Kanellopoulos, Panagiotis Mitropoulos, Panagiotis Pomonis, Robert Moritz and Massimo Chiaradia
The ophiolitic rocks of the Attic-Cycladic crystalline belt are considered of key importance for understanding the Mesozoic tectonic evolution of the Aegean region. Unresolved questions concern their tectono-stratigraphic relationships across the region....
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Mauricio Mella,Jorge Munoz,Mario Vergara,Erik Klohn,Lang Farmer,Charles R. Stern
Pág. 131 - 154
The Tronador Volcanic Group (TVG) is located in the transition between the central and southern segment of the Andean Southern Volcanic Zone (SVZ), »50 km to the east of the current volcanic front. The TVG includes, from older to younger, the deeply erod...
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