Archean Metallogeny and Crustal Evolution in the East Indian Shield
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چکیده
منابع مشابه
Crustal Evolution in the SW Part of the Baltic Shield: the Hf Isotope Evidence
The results of a laser ablation microprobe–inductively coupled by the more widely used samarium–neodymium system (e.g. Dickin, 1995). As a tracer of petrogenetic processes, plasma mass spectrometry Lu–Hf isotope study of zircons in however, Lu–Hf has one important advantage over Sm– 0·93–1·67 Ga rocks from south Norway indicate that early Nd: zircons retain a robust memory of their initial Hf P...
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Shallow water sedimentary units are generally considered scarce in Archean greenstone belts. We describe an unusual quartz arenite-subaerial andesite association within the Archean Hisovaara greenstone belt, a fragment of the Parandovo-Tikshozero belt within the Karelian craton of the Baltic Shield. The Hisovaara greenstone belt consists of several lithotectonic assemblages: (1) a komatiite-tho...
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The East African Orogen (EAO) is one of Earth’s great collision zones, where East and West Gondwana collided to form the supercontinent ‘Greater Gondwana’ or ‘Pannotia’ at the end of Neoproterozoic time. There is now sufficient Nd isotopic data for basement rocks of the EAO to yield a useful summary. A total of 449 samples were gleaned from the literature, recalculated to a common value for the...
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ژورنال
عنوان ژورنال: Earth Sciences
سال: 2015
ISSN: 2328-5974
DOI: 10.11648/j.earth.s.2015040401.11