Zobrazeno 1 - 10
of 91
pro vyhledávání: '"Bruce A Kjarsgaard"'
Autor:
Alan B. Woodland, Carolin Gräf, Theresa Sandner, Heidi E. Höfer, Hans-Michael Seitz, D. Graham Pearson, Bruce A. Kjarsgaard
Publikováno v:
Scientific Reports, Vol 11, Iss 1, Pp 1-10 (2021)
Abstract We present the first oxidation state measurements for the subcontinental lithospheric mantle (SCLM) beneath the Rae craton, northern Canada, one of the largest components of the Canadian shield. In combination with major and trace element co
Externí odkaz:
https://doaj.org/article/d960856c06f44c0d882b3b0cebd60d69
Autor:
Benjamin J.C. Neil, Daniel B. Tersmette, Thomas Chacko, Larry M. Heaman, Bruce A. Kjarsgaard, Edith Martel, Robert A. Creaser, D. Graham Pearson, Richard A. Stern, S. Andrew Dufrane, Yan Luo
Publikováno v:
Geology. 51:597-601
We report the discovery of one of the largest ancient (>3.0 Ga) crustal terranes on Earth. Granitoids with crystallization ages >3.0 Ga and/or Sm-Nd depleted mantle model ages ≥3.2 Ga define a ~1000 × 100 km belt on the western margin of the Rae c
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::cfb8be398359d2805fa9a9f10f190c94
https://doi.org/10.1130/g51110.1
https://doi.org/10.1130/g51110.1
Multidisciplinary Modeling of Mantle Lithosphere Structure Within the Superior Craton, North America
Autor:
David B. Snyder, Geneviève Savard, Bruce A. Kjarsgaard, Aeron Vaillancourt, Phillips C. Thurston, John A. Ayer, Eric Roots
Publikováno v:
Geochemistry, Geophysics, Geosystems, Vol 22, Iss 4, Pp n/a-n/a (2021)
Abstract New 3D multi‐azimuthal receiver function analysis identified four regional seismic discontinuities dipping at 7–13° within the mantle of the Superior craton of North America; most are discordant to known major upper crustal structures.
Externí odkaz:
https://doaj.org/article/5c3271d210d64cf0b800ac67c19fa41e
Autor:
Bruce A. Kjarsgaard, Mike de Wit, Larry M. Heaman, D. Graham Pearson, Johann Stiefenhofer, Nicole Janusczcak, Steven B. Shirey
Publikováno v:
Reviews in Mineralogy and Geochemistry. 88:1-117
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1b1086382fe35be0b8204d2c63e5d8ca
https://doi.org/10.2138/rmg.2022.88.01
https://doi.org/10.2138/rmg.2022.88.01
Publikováno v:
Canadian Journal of Earth Sciences. 58:1005-1026
The glacial land system of western Keewatin region, northern Canada, consists of three significant events: (1) regional emplacement of subglacial sediments, mainly till; (2) landscape erosion with development of an integrated, anabranched network of
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ba53ac8fa51989ff72e3e08af6c8dc6a
https://doi.org/10.1139/cjes-2020-0136
https://doi.org/10.1139/cjes-2020-0136
Publikováno v:
Elements. 17:315-320
Carbonatites are the most silica-poor magmas known and are amongst Earth’s most enigmatic igneous rocks. They crystallise to rocks dominated by the carbonate minerals calcite and dolomite. We review models for carbonatite petrogenesis, including di
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::af4dc4873576e764bdaf0f8f386dcb29
https://doi.org/10.2138/gselements.17.5.315
https://doi.org/10.2138/gselements.17.5.315
Autor:
G. J. Irvine, Bruce A. Kjarsgaard, D. Graham Pearson, John Armstrong, Jingao Liu, Andrew J. Schaeffer, Lawrence Hongliang Wang, Kathy A. Mather, Maya G. Kopylova
Publikováno v:
Nature. 592:732-736
Cratons are Earth’s ancient continental land masses that remain stable for billions of years. The mantle roots of cratons are renowned as being long-lived, stable features of Earth’s continents, but there is also evidence of their disruption in t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b6cb1a6f1bb17414a2498fb421ac9092
https://doi.org/10.1038/s41586-021-03395-5
https://doi.org/10.1038/s41586-021-03395-5
Publikováno v:
Canadian Journal of Earth Sciences. 57:167-183
The Paleoproterozoic East Arm Basin of Canada hosts polymetallic vein, iron oxide–apatite (IOA), and potential iron oxide–copper–gold (IOCG) mineral occurrences, mainly associated with a belt of ca. 1.87 Ga intermediate-composition sills termed
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::59349e1f17dae04c5e3d434874f18309
https://doi.org/10.1139/cjes-2018-0171
https://doi.org/10.1139/cjes-2018-0171
Publikováno v:
Elements. 15:411-416
Kimberlites are the main source of natural gem-quality diamonds. The intrepid diamond explorer faces three major problems. First, finding a small, usually less than 300 m diameter, kimberlite, which is often highly weathered. Second, evaluating the q
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7be763c2d95ce8a1d33be7badb3fcc99
https://doi.org/10.2138/gselements.15.6.411
https://doi.org/10.2138/gselements.15.6.411
Publikováno v:
Elements. 15:393-398
High-pressure experiments are unconvincing in explaining kimberlites as direct melts of carbonated peridotite because the appropriate minerals do not coexist stably at the kimberlite liquidus. High-pressure melts of peridotite with CO2 and H2O have c
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3e7b20fa490412e54600ca3871e6ea00
https://doi.org/10.2138/gselements.15.6.393
https://doi.org/10.2138/gselements.15.6.393