Zobrazeno 1 - 10
of 64
pro vyhledávání: '"Daniel D. Marshall"'
Publikováno v:
Economic Geology. 118:883-902
The A.M. breccia is part of the Giant Copper porphyry deposit in southern British Columbia. It is the only well-defined zoned tourmaline breccia pipe in the Canadian Cordillera. Tourmaline is a common alteration mineral within the A.M. breccia and is
Autor:
David A. Foster, Dejan Milidragovic, Derek J. Thorkelson, James L. Crowley, Daniel D. Marshall, Jacob Verbaas, H. Daniel Gibson
Publikováno v:
Lithos. :243-260
The Hart River sills are a set of mafic to intermediate intrusions that occur in northern Yukon, Canada. The largest sills are over 500 m thick and over 200 km long. New U-Pb dates of 1382.15 ± 0.39 Ma and 1382.14 ± 0.36 Ma were obtained via chemic
Autor:
Derek J. Thorkelson, Daniel D. Marshall, Dejan Milidragovic, James L. Crowley, William J. Davis, David A. Foster, H.D. Gibson, Jacob Verbaas
Publikováno v:
Precambrian Research. 305:19-39
The Columbia (Nuna) supercontinent existed from approximately 1.9 Ga to 1.3 Ga. Laurentia was part of Columbia, and the western edge of Laurentia (current coordinates) was likely proximal to a large landmass during parts of this interval. Here, we pr
Autor:
Donald W. Davis, George R. Dix, Jill L. Kendrick, Kamil Chadirji-Martinez, Daniel D. Marshall, C. N. Sutcliffe, Chris Yakymchuk
Publikováno v:
Chemical Geology. 586:120582
Petrology, geochemistry, fluid inclusions and U Pb dating of a wide (30 cm) calcite vein in Upper Ordovician (Sandbian) limestone characterize a hydrochemical microcosm of changing fluid sources and carbon pathways related to burial, then uplift duri
Autor:
Thomas Mumenthaler, Sarah Ellis, Peter C. Jones, Nicolas Meisser, François Bussy, Daniel D. Marshall
Publikováno v:
The Canadian Mineralogist. 55:725-741
Emerald from the Binntal occurrence in the Canton of Valais in Switzerland has been studied to determine its chemical zonation, stable isotopic signatures, depositional-fluid characteristics, pressure-temperature emplacement conditions, and formation
Autor:
Mostafa Fayek, Daniel D. Marshall, Daniel J. Kontak, Gaston Giuliani, Donald J. Lake, Hendrik Falck, Lee A. Groat, Thomas Mulja, Jan Cempírek
Publikováno v:
The Canadian Mineralogist. 55:561-593
Emerald at the Lened occurrence in the western Northwest Territories is hosted by quartz veins cutting skarn near the Lened granite pluton and older Selwyn Basin strata. Using field relationships, Ar-Ar dating, whole-rock geochemistry, stable isotope
Autor:
Francesca Furlanetto, Daniel D. Marshall, H.D. Gibson, Derek J. Thorkelson, Robert H. Rainbird, W J Davis
Publikováno v:
Gondwana Research. 39:14-40
The Paleoproterozoic Wernecke Supergroup of Yukon was deposited when the northwestern margin of Laurentia was undergoing major adjustments related to the assembly of the supercontinent Columbia (Nuna) from 1.75 to 1.60 Ga. U–Pb detrital zircon geoc
Publikováno v:
Minerals, Vol 9, Iss 2, p 105 (2019)
Minerals
Minerals, MDPI, 2019, 9 (2), pp.105. ⟨10.3390/min9020105⟩
Minerals, 2019, 9 (2), pp.105. ⟨10.3390/min9020105⟩
Minerals
Minerals, MDPI, 2019, 9 (2), pp.105. ⟨10.3390/min9020105⟩
Minerals, 2019, 9 (2), pp.105. ⟨10.3390/min9020105⟩
International audience; Although emerald deposits are relatively rare, they can be formed in several different, but specific geologic settings and the classification systems and models currently used to describe emerald precipitation and predict its
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c36ceb54d7df959fea489a423ae05d14
http://www.documentation.ird.fr/hor/fdi:010075314
http://www.documentation.ird.fr/hor/fdi:010075314
Autor:
Daniel D. Marshall, Armond Stansell, Ross Easterbrook, Robert Greene, Carol-Anne Nicol, Rick Sawyer
Publikováno v:
Geosciences, Vol 8, Iss 11, p 422 (2018)
Geosciences
Volume 8
Issue 11
Geosciences
Volume 8
Issue 11
Gold, present as electrum, in the Battle Gap, Ridge North-West, HW, and Price deposits at the Myra Falls mine, occurs in late veinlets cutting the earlier volcanogenic massive sulphide (VMS) lithologies. The ore mineral assemblage containing the elec
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b55ef50ee7875a9bc6d8aecb82db5a59
https://doi.org/10.20944/preprints201809.0151.v1
https://doi.org/10.20944/preprints201809.0151.v1
Autor:
Claire McGill, Lizhong Lu, Daniel D. Marshall, Su Xu, Simon M. Hutchinson, Helen Ball, Radja Bougherira, Weigou Zhang, Liu Min, Brian Ward, Peter J Baugh
Publikováno v:
Current Trends in Analytical and Bioanalytical Chemistry. 2
The surface and core sediments obtained from the Yangtze River-south coast estuarine region, and analysed by GC/MS after sample preparation, exhibit a range of organic pollutants over depths from the surface to 0.5 m. The target organic compounds ide