TY - JOUR
T1 - Zircons and clay from morainal Permian siltstone at Mt Rymill (73°S, 66°E), Prince Charles Mountains, Antarctica, reflect the ancestral Gamburtsev Subglacial Mountains-Vostok Subglacial Highlands complex
AU - Veevers, J. J.
AU - Saeed, A.
AU - Pearson, N.
AU - Belousova, E.
AU - Kinny, P. D.
PY - 2008/10
Y1 - 2008/10
N2 - Clasts of red siltstone with Glossopteris from moraine around Mt Rymill in the southern Prince Charles Mountains, East Antarctica, can be traced upslope in the Lambert Graben system to the nearby Gamburtsev Subglacial Mountains (GSM). The clasts contain zircons with SHRIMP U-Pb ages of 620-460 Ma and 1300-970 Ma from host rocks of intermediate to mafic rocks, and a clay fraction with a TDM Nd model age of 2.72 Ga and εNd of - 18.3, derived from upper continental crust. East of the GSM, at Lake Vostok, clasts of siltstone in accreted ice can be traced to the Vostok Subglacial Highlands (VSH). The clasts contain zircons and monazites with SHRIMP U-Pb ages [Leitchenkov, G.L., Belyatsky, B.V., Rodionov, N.V., Sergeev, S.A., 2007. Insight into the geology of the East Antarctic hinterland: a study of mineral inclusions from ice cores of the Lake Vostok borehole. In: Cooper, A.K., Raymond, C.R. (Eds.), Online Proceedings of the 10th ISAES, USGS Open-file Report 2007-1047, Short research Paper 014, 4 pages.] broadly similar to those from Mt Rymill, and a TDM Nd model age of 1.88 Ga and εNd of - 15 [Delmonte, B., Petit, J.R., Basile-Doelsch, I., Lipenkov, V., Maggi, V., 2004. First characterization and dating of East Antarctic bedrock inclusions from subglacial Lake Vostok accreted ice. Environmental Chemistry 1, 90-94.]. Other Mesozoic and Paleozoic sediments deposited in a radial pattern about central Antarctica contain detrital zircons dominated by populations aged 700-500 Ma and 1300-1000 Ma, which we interpret as reflecting a GSM-VSH provenance dominated by rocks generated during the Pan-Gondwanaland and Grenville events of supercontinental assembly.
AB - Clasts of red siltstone with Glossopteris from moraine around Mt Rymill in the southern Prince Charles Mountains, East Antarctica, can be traced upslope in the Lambert Graben system to the nearby Gamburtsev Subglacial Mountains (GSM). The clasts contain zircons with SHRIMP U-Pb ages of 620-460 Ma and 1300-970 Ma from host rocks of intermediate to mafic rocks, and a clay fraction with a TDM Nd model age of 2.72 Ga and εNd of - 18.3, derived from upper continental crust. East of the GSM, at Lake Vostok, clasts of siltstone in accreted ice can be traced to the Vostok Subglacial Highlands (VSH). The clasts contain zircons and monazites with SHRIMP U-Pb ages [Leitchenkov, G.L., Belyatsky, B.V., Rodionov, N.V., Sergeev, S.A., 2007. Insight into the geology of the East Antarctic hinterland: a study of mineral inclusions from ice cores of the Lake Vostok borehole. In: Cooper, A.K., Raymond, C.R. (Eds.), Online Proceedings of the 10th ISAES, USGS Open-file Report 2007-1047, Short research Paper 014, 4 pages.] broadly similar to those from Mt Rymill, and a TDM Nd model age of 1.88 Ga and εNd of - 15 [Delmonte, B., Petit, J.R., Basile-Doelsch, I., Lipenkov, V., Maggi, V., 2004. First characterization and dating of East Antarctic bedrock inclusions from subglacial Lake Vostok accreted ice. Environmental Chemistry 1, 90-94.]. Other Mesozoic and Paleozoic sediments deposited in a radial pattern about central Antarctica contain detrital zircons dominated by populations aged 700-500 Ma and 1300-1000 Ma, which we interpret as reflecting a GSM-VSH provenance dominated by rocks generated during the Pan-Gondwanaland and Grenville events of supercontinental assembly.
UR - http://www.scopus.com/inward/record.url?scp=48349137635&partnerID=8YFLogxK
U2 - 10.1016/j.gr.2007.12.006
DO - 10.1016/j.gr.2007.12.006
M3 - Article
AN - SCOPUS:48349137635
SN - 1342-937X
VL - 14
SP - 343
EP - 354
JO - Gondwana Research
JF - Gondwana Research
IS - 3
ER -