The Nui Chua layered peridotite-gabbro complex as manifestation of Permo-Triassic mantle plume in northern Vietnam
G.V. Polyakova, R.A. Shelepaeva, Tran Trong Hoab, A.E. Izokha, P.A. Balykina, Ngo Thi Phuongb, Tran Quoc Hungb, Bui An Nien b
a Sobolev Institute of Geology and Mineralogy, Siberian Branch of the RAS, 3 prosp. Akad. Koptyuga, Novosibirsk, 630090, Russia
b Geological Institute of the Vietnamese Academy of Sciences and Technologies, Hanoi, Vietnam
Keywords: layered peridotite-gabbro complex; Permo-Triassic mantle plume; layered and pegmatoid series; parental melts; ore-geochemical specialization; Vietnam
Pages: 493-508
Abstract
New data on the age, composition, formation conditions, and ore-geochemical specialization of the Nui Chua layered peridotite-gabbro complex are reported. They evidence that the complex resulted from the Permo-Triassic mantle plume activity in northern Vietnam (southern framing of the Yangtze Platform). Two series of mafic and ultramafic rocks differing in ore productivity-layered (PGE-Cu-Ni) and pegmatoid (Fe-Ti-V)-have been recognized within the complex. The first estimates of the composition of their parental melts have been obtained.
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