Zobrazeno 1 - 10 of 17 pro vyhledávání: '"D. C. Gregoire"'
1
Determination of trace elements in granites by inductively coupled plasma mass spectrometry
Autor: Qi Liang, Hu Jing, D. C. Gregoire
Publikováno v: Talanta. 51:507-513
Proposed is a simple and reliable method for the dissolution of granite and the determination of 38 elements by inductively coupled plasma mass spectrometry. One hundred milligrams of sample are digested with 1 ml of HF and 0.5 ml of HNO(3) in screw
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d7525ab70229885c7ba2ee10faf241ee
https://doi.org/10.1016/s0039-9140(99)00318-5
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2
Platinum group element enrichments and possible chondritic Ru:Ir across the Frasnian–Famennian boundary, western New York State
Autor: C.A. Conaway, D. C. Gregoire, D. J. Over, Wayne D. Goodfellow, D.J. Katz
Publikováno v: Palaeogeography, Palaeoclimatology, Palaeoecology. 132:399-410
The Frasnian–Famennian boundary is recognized as the culmination of a global mass extinction in the Late Devonian. In western New York State the boundary is a distinct horizon within a pyritic black shale bed of the upper Hanover Shale defined by t
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2016fea400c817830ecf90cbe5485d41
https://doi.org/10.1016/s0031-0182(97)00064-3
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3
Fractionation of ruthenium from iridium at the Cretaceous-Tertiary boundary
Autor: Thomas J. Ahrens, Noreen J. Evans, D. C. Gregoire
Publikováno v: Earth and Planetary Science Letters. 134:141-153
New data on Ru/Ir abundance ratios are presented for nonmarine (Hell Creek, Montana; Frenchman River, Saskatchewan) and marine Cretaceous-Tertiary boundary sites (Brazos River, Texas; Beloc, Haiti; DSDP 577 and DSDP 596). The Ru/Ir ratio varies from
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::a954faa48482e7178b0e62d5b1e17bb5
https://doi.org/10.1016/0012-821x(95)00117-u
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5
Use of platinum-group elements for impactor identification: Terrestrial impact craters and Cretaceous-Tertiary boundary
Autor: Noreen J. Evans, R.A.F grieve, Ján Veizer, Wayne D. Goodfellow, D. C. Gregoire
Publikováno v: Geochimica et Cosmochimica Acta. 57:3737-3748
This study presents the abundances of Ru, Ir, Pt, Pd, Rh, and Au (platinum-group elements; PGE) in the ejecta layer at the Cretaceous-Tertiary boundary and melt rocks from East Clearwater Lake, Brent, New Quebec, and Lake Wanapitei impact craters, al
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::257ec49cf81ff0ca90de0841ba7845d9
https://doi.org/10.1016/0016-7037(93)90152-m
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6
Data Report: Major and trace element geochemistry of shipboard samples from Site 957, TAG hydrothermal field, Mid-Atlantic Ridge
Autor: P. Belanger, Peter Herzig, Sven Petersen, D. C. Gregoire, Mark D. Hannington
Representative samples of drill core were collected from each of the five main areas drilled on the TAG (Trans-Atlantic Geotraverse) mound during Leg 158 (Humphris, Herzig, Miller, et al., 1996). In this report, we present the results of chemical ana
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::4497b58e7730cf10e786ddefe238887d
https://doi.org/10.2973/odp.proc.sr.158.203.1998
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