Результаты исследований: Научные публикации в периодических изданиях › статья
The geological composition of the hidden Wilhelm II Land in East Antarctica: SHRIMP zircon, Nd isotopic and geochemical studies with implications for Proterozoic supercontinent reconstructions. / Mikhalsky, E.V.; Belyatsky, B.V.; Presnyakov, S.L.; Skublov, S.G.; Kovach, V.P.; Rodionov, N.V.; Antonov, A.V.; Saltykova, A.K.; Sergeev, S.A.
в: Precambrian Research, Том 258, 2015, стр. 171-185.Результаты исследований: Научные публикации в периодических изданиях › статья
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TY - JOUR
T1 - The geological composition of the hidden Wilhelm II Land in East Antarctica: SHRIMP zircon, Nd isotopic and geochemical studies with implications for Proterozoic supercontinent reconstructions
AU - Mikhalsky, E.V.
AU - Belyatsky, B.V.
AU - Presnyakov, S.L.
AU - Skublov, S.G.
AU - Kovach, V.P.
AU - Rodionov, N.V.
AU - Antonov, A.V.
AU - Saltykova, A.K.
AU - Sergeev, S.A.
PY - 2015
Y1 - 2015
N2 - © 2014 Elsevier B.V. In this paper we present new U-Pb zircon age, Sm-Nd isotopic and chemical composition data for rocks cropping out in a few isolated nunataks in Wilhelm II Land in East Antarctica, namely Mirny oasis, Mt Brown and Gaussberg volcano, which contains xenogenic crustal material. These outcrops were subjects of geological investigations during the Soviet Antarctic Expedition of 1956-1957. Our data show that this region is underlain by a uniform crust which experienced a high-grade metamorphic event at ca 980-920Ma, co-eval with the Rayner Orogeny in Kemp Land and the northern Prince Charles Mountains. Extensive indications of a ca 500Ma event in coastal areas (granitoid intrusions in Mirny oasis and inherited zircons found in Gaussberg volcano), together with the lack of indications of this age in Mt Brown, point to a concentration of ca 500Ma processes (roughly co-eval with the Prydz Orogeny) in the coastal part of Wilhelm II Land and their attenuation inland. We also determined a ca 1480Ma ag
AB - © 2014 Elsevier B.V. In this paper we present new U-Pb zircon age, Sm-Nd isotopic and chemical composition data for rocks cropping out in a few isolated nunataks in Wilhelm II Land in East Antarctica, namely Mirny oasis, Mt Brown and Gaussberg volcano, which contains xenogenic crustal material. These outcrops were subjects of geological investigations during the Soviet Antarctic Expedition of 1956-1957. Our data show that this region is underlain by a uniform crust which experienced a high-grade metamorphic event at ca 980-920Ma, co-eval with the Rayner Orogeny in Kemp Land and the northern Prince Charles Mountains. Extensive indications of a ca 500Ma event in coastal areas (granitoid intrusions in Mirny oasis and inherited zircons found in Gaussberg volcano), together with the lack of indications of this age in Mt Brown, point to a concentration of ca 500Ma processes (roughly co-eval with the Prydz Orogeny) in the coastal part of Wilhelm II Land and their attenuation inland. We also determined a ca 1480Ma ag
U2 - 10.1016/j.precamres.2014.12.011
DO - 10.1016/j.precamres.2014.12.011
M3 - Article
VL - 258
SP - 171
EP - 185
JO - Precambrian Research
JF - Precambrian Research
SN - 0301-9268
ER -
ID: 3980418