P-T-time Path of Ultrahigh-Pressure Metamorphism Induced by Zircon Inclusion Method
نویسندگان
چکیده
منابع مشابه
Early Proterozoic ultrahigh pressure metamorphism: evidence from microdiamonds.
Microdiamonds from the Akluilâk minette dykes (Nunavut, Canada) are similar to diamonds formed in subducted metamorphic rocks. High concentrations of unaggregated nitrogen and positive delta(15)N suggest that the microdiamonds formed within rocks subducted to ultrahigh pressures before being sampled by the minette magma 1.8 billion years ago. This ultrahigh pressure metamorphism in North Americ...
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The Dabie Shan Ultrahigh-Pressure Metamorphic (UHPM) Belt occupies the suture between the Yangtze and Sino-Korean blocks in east-central China. The timing of UHPM in the Dabie belt is controversial, and most recent data come from dating of zircons. Monazite has recently been recognized as useful for dating of multiple tectonic events due to its preservation of multiple growth zones, and monazit...
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New SHRIMP and TIMS zircon ages, Ar=Ar ages, and eclogite locations contribute significantly to our understanding of the ultrahigh-pressure Dabie Shan. (1) The geographic extent of the Yangtze craton that was subducted to ultrahigh pressure extends to the northern edge of the Dabie Shan. (2) The northern half of the Dabie Shan is a magmatic complex, intruded over a 10-Myr interval between 137 a...
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M. Lang, U.A. Glasmacher, H. Keppler, F. Langenhorst, R. Neumann, D. Schardt, C. Trautmann, G.A. Wagner Gesellschaft für Schwerionenforschung (GSI), Planckstr. 1, Darmstadt, Germany Forschungsstelle Archäometrie der Heidelberger Akademie der Wissenschaften am MPI für Kernphysik, Heidelberg, Germany 3 Bayerisches Geoinstitut (BGI), Universität Bayreuth, Universitätsstr. 30, Bayreuth, Germany, In...
متن کاملLooping P-T paths and high-T, low-P middle crustal metamorphism: Proterozoic evolution of the southwestern United States
Proterozoic rocks of the southwestern United States exhibit a variety of tectonometamorphic histories that can all be explained by a characteristic looping style of pressure-temperature (P-T) path. The path is fundamentally clockwise. However, because the rocks were cooled isobarically at 3 kbar after tectonism, the cooling path crosses the prograde path, leading to a geometry with a counterclo...
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ژورنال
عنوان ژورنال: Journal of Geography (Chigaku Zasshi)
سال: 2004
ISSN: 0022-135X,1884-0884
DOI: 10.5026/jgeography.113.5_678