Zobrazeno 1 - 10 of 79 pro vyhledávání: '"M E, Bickford"'
1
Paleoarchean Gneisses in the Minnesota River Valley and Northern Michigan, USA
Autor: Joseph L. Wooden, Mark D. Schmitz, Aaron M. Satkoski, M. E. Bickford, Scott D. Samson, George D. Kamenov, Paul A. Mueller, Robert L. Bauer
Paleoarchean to Mesoarchean gneisses are exposed in the Minnesota River Valley (MRV) and in northern Michigan, USA. The MRV rocks include a complex of granitic migmatites, schistose to gneissic amphibolite, metagabbro, and paragneisses. The best-know
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::c5ddf3150e2fe0dc29249247291d806e
https://doi.org/10.1016/b978-0-444-63901-1.00027-7
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2
New U-Pb ages of zircons in the Owk Shale (Kurnool Group) with reflections on proterozoic porcellanites in India
Autor: George D. Kamenov, Jürgen Schieber, M. E. Bickford, Dilip Saha, A. Russell, Abhijit Basu
Publikováno v: Journal of the Geological Society of India. 82:207-216
Felsic tuff beds with some presumed sedimentary components were reported from the Owk Shale (Kurnool Group; bearing Neoproterozoic fossils) in the upper part of the sedimentary succession in the Cuddapah basin in India by Saha and Tripathy (2012a). O
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::ce6b07ad7558b138b109f7f9741bb1ba
https://doi.org/10.1007/s12594-013-0143-2
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3
Geochemical and Hf–Nd isotopic constraints on the crustal evolution of Archean rocks from the Minnesota River Valley, USA
Autor: George D. Kamenov, Robert L. Bauer, Scott D. Samson, A.M. Satkoski, Paul A. Mueller, M. E. Bickford
Publikováno v: Precambrian Research. 224:36-50
The 3.5–2.6 Ga rocks of the Minnesota River Valley (MRV) provide a unique opportunity to examine rocks that span the now recognized crucial time (3.2–3.0 Ga) on the Earth when Wilson style plate tectonic processes likely started. To elucidate the
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::bc9a4eb6efa1f36186c8f36974e966c7
https://doi.org/10.1016/j.precamres.2012.09.003
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5
Implications of a Newly Dated ca. 1000-Ma Rhyolitic Tuff in the Indravati Basin, Bastar Craton, India
Autor: Juergen Schieber, Arunangshu Mukherjee, M. E. Bickford, Jack Hietpas, Abhijit Basu
Publikováno v: The Journal of Geology. 120:477-485
A rhyolitic tuff with a minimum thickness of about 2.5 m occurs at the top of the sedimentary succession of the Indravati Group in south-central India. The tuff is a high-K, low-Na rhyolite with dominantly K-feldspar phenocrysts. Cathodoluminescence
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::f34e885d4cc22a3b6a517e2f32d153f5
https://doi.org/10.1086/665796
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6
New U-Pb SHRIMP Zircon Ages of the Dhamda Tuff in the Mesoproterozoic Chhattisgarh Basin, Peninsular India: Stratigraphic Implications and Significance of a 1-Ga Thermal-Magmatic Event
Autor: M. E. Bickford, Jack Hietpas, Ranjan Kumar Ray, Arunangshu Mukherjee, Juergen Schieber, Rajeeva Guhey, Purbasha Bhattacharya, Pratap Chandra Dhang, Abhijit Basu, Sarbani Patranabis-Deb
Publikováno v: The Journal of Geology. 119:535-548
Magmatic zircons from two samples of the Dhamda Tuff in the Tarenga Formation of the Mesoproterozoic Chhattisgarh Supergroup in central India were dated by U-Pb SHRIMP methods, which yielded a concordia upper-intercept age of Ma. The samples are from
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::df4dc30ce25df36323d64845058fac13
https://doi.org/10.1086/661193
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8
Episodic zircon ages, Hf isotopic composition, and the preservation rate of continental crust
Autor: David W. Scholl, M. E. Bickford, Richard C. Aster, Kent C. Condie, Elena Belousova
Publikováno v: Geological Society of America Bulletin. 123:951-957
U/Pb detrital zircon ages from global modern river sediments define eight peak clusters centered at 2700, 2500, 2010, 1840, 1600, 1150, 600, and 300 Ma. These clusters extend vertically into both positive and negative e Hf (T) space and are similar t
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::7f8c6c8cba2712bcb78d20678c6b315c
https://doi.org/10.1130/b30344.1
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9
Depositional History of the Chhattisgarh Basin, Central India: Constraints from New SHRIMP Zircon Ages
Autor: M. E. Bickford, Juergen Schieber, Sarbani Patranabis-Deb, Pratap Chandra Dhang, Abhijit Basu
Publikováno v: The Journal of Geology. 119:33-50
The Indian Shield includes the Singhbhum, Bastar, and East and West Dharwar cratons. Proterozoic sedimentary basins formed on these cratons have preserved rocks with a range of degrees of metamorphism and deformation. In the Chhattisgarh Basin, withi
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::b5044b506b4e6a27daa07dc8cbeb3343
https://doi.org/10.1086/657300
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10
Mechanism of metamorphic zircon growth in a granulite-facies quartzite, Adirondack Highlands, Grenville Province, New York
Autor: Gretchen Swarr, James M. McLelland, M. E. Bickford, William H. Peck, Ashley N. Nagle
Publikováno v: American Mineralogist. 95:1796-1806
Granulite-facies quartzites from the Adirondack Highlands (Grenville Province, New York) contain accessory zircon with ubiquitous metamorphic overgrowths. Detrital zircon cores are resorbed, preserve various internal zoning styles and inclusions, and
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::f161bd21eca4c1f2d894ed6ab0277462
https://doi.org/10.2138/am.2010.3547
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