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Date: 2006
Language: eng
Resource Type: journal article
Identifier: http://hdl.handle.net/1959.14/10133
Description: The first in situ Hf and U-Pb isotope analyses of zircon separates from Mesozoic granites in southern Tibet identify a significant, previously unknown stage of magmatism. Igneous zircons (n = 34) from ... More
Reviewed: Reviewed
Date: 2005
Language: eng
Resource Type: journal article
Identifier: http://hdl.handle.net/1959.14/36584
Description: The Hf isotope composition of rutile in mica-amphibole-rutile-ilmenite-diopside (MARID) xenoliths from the Kimberley area of South Africa has been analyzed in situ by laser ablation microprobe–multico ... More
Reviewed: Reviewed
Date: 2005
Subject Keyword: Africa | Breccia | Hydrothermal | Karst | Silicification
Language: eng
Resource Type: journal article
Identifier: http://hdl.handle.net/1959.14/334027
Description: The Richat structure (Sahara, Mauritania) appears as a large dome at least 40 km in diameter within a Late Proterozoic to Ordovician sequence. Erosion has created circular cuestas represented by three ... More
Reviewed: Reviewed
Date: 2004
Language: eng
Resource Type: journal article
Identifier: http://hdl.handle.net/1959.14/16736
Description: U-Pb and Hf isotope analyses of zircons from felsic granulite xenoliths in Mesozoic volcanics reveal Early Archean (≥3.6 Ga) lower crust beneath the younger (<2.85 Ga) southern margin of the North Chi ... More
Reviewed: Reviewed
Date: 2004
Subject Keyword: 040200 Geochemistry | 040300 Geology
Language: eng
Resource Type: journal article
Identifier: http://hdl.handle.net/1959.14/1148861
Description: 4 page(s)
Reviewed: Reviewed
Date: 2004
Subject Keyword: 040200 Geochemistry | 040300 Geology
Language: eng
Resource Type: journal article
Identifier: http://hdl.handle.net/1959.14/1124486
Description: Given that oceanic basalts form by partial melting of mantle peridotites that rise below mid-ocean ridges, peridotite and basalt should have identical Sr and Nd isotope ratios. We tested this concept ... More
Reviewed: Reviewed
Date: 2003
Language: eng
Resource Type: journal article
Identifier: http://hdl.handle.net/1959.14/1157275
Description: Gas chromatography-mass spectrometry of oil inclusions from the ca. 1430 Ma marine Roper Group in the Roper Superbasin, Australia, provides a new source of information about the early biosphere and Pr ... More
Reviewed: Reviewed
Date: 2003
Language: eng
Resource Type: journal article
Identifier: http://hdl.handle.net/1959.14/30499
Description: The Peninsular Ranges batholith of southern California and Baja California was emplaced across the litho spheric boundary between North America and Pacific plates in the Jurassic and Cretaceous, In Sa ... More
Reviewed: Reviewed
Date: 2003
Subject Keyword: 040300 Geology
Language: eng
Resource Type: journal article
Identifier: http://hdl.handle.net/1959.14/30514
Description: The Peninsular Ranges batholith of southern California and Baja California, Mexico, is well recognized as a prime example of an I-type Cretaceous batholith. Often overlooked, however, is a volumetrica ... More
Reviewed: Reviewed
Date: 2003
Subject Keyword: 040300 Geology
Language: eng
Resource Type: journal article
Identifier: http://hdl.handle.net/1959.14/1124408
Description: The mechanisms by which magma is generated and transported through continental crust and how these processes affect the chemical and mechanical evolution of the lithosphere are some of the least under ... More
Reviewed: Reviewed
Date: 2003
Language: eng
Resource Type: journal article
Identifier: http://hdl.handle.net/1959.14/1147854
Description: Biostratigraphic and chemostratigraphic studies of Australian late Neoproterozoic (Ediacarian) fossil plankton (acritarch) successions reveal a striking relationship between a radical palynofloral cha ... More
Reviewed: Reviewed
Date: 2003
Language: eng
Resource Type: journal article
Identifier: http://hdl.handle.net/1959.14/1143089
Description: Landsat 5 Thematic Mapper and 7 Enhanced Thematic Mapper imagery reveal lake shorelines in the White Nile valley as far south as lat 10°N. The highest shoreline is at 386 m elevation and was eroded wh ... More
Reviewed: Reviewed
Authors: Veevers, J. J
Date: 2003
Language: eng
Resource Type: journal article
Identifier: http://hdl.handle.net/1959.14/26927
Description: Gondwanaland was assembled by 650–570 Ma oblique subduction of ocean floor between cratons, including the Mozambique Ocean between West and East Gondwanaland. Oblique convergence set the cratons into ... More
Reviewed: Reviewed
Date: 2003
Language: eng
Resource Type: journal article
Identifier: http://hdl.handle.net/1959.14/26947
Description: The Os isotope compositions of sulfides in mantle xenoliths from the Penghu Islands, Taiwan Strait, reveal the presence of Proterozoic subcontinental lithospheric mantle beneath the highly extended so ... More
Reviewed: Reviewed
Date: 2002
Language: eng
Resource Type: journal article
Identifier: http://hdl.handle.net/1959.14/26636
Description: Silurian–Devonian bimodal volcanism—a common feature of the northern Appalachians of the northeastern United States and eastern Canada—forms major belts of igneous rocks including the Coastal volcanic ... More
Reviewed: Reviewed