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Early palaeozoic near-surface deformation in the neptune range, Antarctica: Implications for the Ross and Gondwanian orogenies
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Abstract: The Neptune Range of the Pensacola Mountains, East Antarctica, exposes a record of Early Palaeozoic to Early Mesozoic polyphase deformation along the former East Antarctic margin of Gondwana that is unique within the 3500 km length of the Transantarctic Mountains. The earliest of these orogenic events is the polyphase Early Palaeozoic Ross orogeny. Following two phases of intense pre-late Mid-Cambrian deformation (D^sub 1^ and D^sub 2^), a succession of volcanic and sedimentary rock...
Related newspaper, magazine, and journal articles from HighBeam Research
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Brittle architecture of the Lanterman Fault and its impact on the final terrane assembly in north Victoria Land, Antarctia
Journal of the Geological Society
; Abstract: The Lanterman Fault is one of the subvertical, NW-SE-striking intraplate shear zones that bound the major Proterozoic to Early Palaeozoic tectono-metamorphic blocks constituting north Victoria Land, Antarctica. This fault zone, several kilometres wide and with an onshore along strike
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Magmatic belts in accretionary margins, a key for tectonic evolution: The Tonalite Belt of North Victoria Land (East Antarctica)
Journal of the Geological Society
; Abstract: Occurring in the Early Palaeozoic palaeomargin of the East Antarctica Craton, the Tonalite Belt of North Victoria Land is a narrow linear magmatic belt up to 200 km long, made up of strongly foliated tonalitic and granodioritic intrusions. They were synkinematically emplaced into the
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Thermochronological (^sup 40^Ar/^sup 39^Ar) evidence of Early Palaeozoic basin inversion within the southern Prince Charles Mountains, East Antarctica: implications for East Gondwana
Journal of the Geological Society
; Abstract: ^sup 40^Ar/^sup 39^Ar systematics within metasedimentary rocks exposed in the southern Prince Charles Mountains, East Antarctica, were thermally reset during a period of Early Palaeozoic (between 524 1 Ma and 486 2 Ma) orogenesis. This event affected three temporally distinct (Archaean to
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On the application of in situ monazite chemical geochronology to constraining P-T-t histories in high-temperature (>850 °C) polymetamorphic granulites from Prydz Bay, East Antarctica
Journal of the Geological Society
; Abstract: We present electron microprobe-based in situ (Th + U)-Pb monazite chemical age data from granulite-facies metapelites in Prydz Bay, East Antarctica. The monazite age data define two distinct age populations, Late Neoproterozoic to Early Palaeozoic (c. 570-520 Ma) and Neoproterozoic (c.
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Obituary: Sir James Stubblefield
The Independent - London
; IN 1960 James Stubblefield became Director of the Geological Survey of Great Britain and of the Museum of Practical Geology (now the Earth Science wing of the Natural History Museum). During his directorship the Survey, the Museum, and the Overseas Geological Surveys were united into the Institute
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The Woolhope and Usk Basins: Silurian rift basins revealed by subsurface mapping of the southern Welsh Borderland
Journal of the Geological Society
; A. J. BUTLER1, N. H. WOODCOCK' & D. M. STEWART2 Abstract: Subsurface mapping of the southern Welsh Borderland has utilized over 600 km of seismic data and three exploration boreholes to investigate the subsurface of this classic geological area. The survey reveals two Silurian basins, each
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Formation and reactivation of the Cambrian Kanmantoo Trough, SE Australia: Implications for early Palaeozoic tectonics at eastern Gondwana's plate margin
Journal of the Geological Society
; T. FLOTTMANN1, P. HAINES 2, J. JAGO 2, P. JAMES1, A. BELPERIO 3,4 & J. GUM 2 Abstract: The Kanmantoo Group is a thick and largely metamorphosed sedimentary succession that filled an isolated arcuate Cambrian basin (Kanmantoo Trough) which formed within continental Gondwana. and now lies on the
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Earth geography from 400 to 250 Ma: a palaeomagnetic, faunal and facies review
Journal of the Geological Society
; ... and defined. Six new palaeogeographical maps at 30 Ma intervals, which ensure kinematic ... often be uncertain or disputed) on our maps, which were essential for the movement ... undoubtedly present. Each terrane shown on our maps has boundaries that are delineated today ...
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Detrital zircon ages in Neoproterozoic to Ordovician siliciclastic rocks, northeastern Australia: implications for the tectonic history of the East Gondwana continental margin
Journal of the Geological Society
; Abstract: U-Pb detrital zircon ages in variably metamorphosed, dominantly fine-grained clastic successions are used in northeastern Australia to identify two major successions along the East Gondwana margin. The older succession is of probable Late Neoproterozoic age and is considered part of a
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Geochronology and geodynamics of Scottish granitoids from the late Neoproterozoic break-up of Rodinia to Palaeozoic collision
Journal of the Geological Society
; Abstract: Thirty-seven granitoids from Scotland have been dated using the sensitive high-resolution ion microprobe zircon method. Granitoids were intruded during: (1) crustal stretching at c. 600 Ma after Rodinia broke up (A-types); (2) the Grampian event of crustal thickening when the Midland
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