Zobrazeno 1 - 10
of 135
pro vyhledávání: '"Akilia"'
Autor:
V. N. Podkovyrov, A. V. Maslov
Publikováno v:
Lithology and Mineral Resources. 56:212-235
The article analyzes the position of individual and average data points of the Archean and Early Proterozoic metaaleuropelites (Isua and Akilia associations, West Greenland; Beit Bridge Complex, Limpopo Province, South Africa; Moodies, Mozaan, and Pr
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c0d4825852a3b8d5c4bf9b3097d611d3
https://doi.org/10.1134/s0024490221030056
https://doi.org/10.1134/s0024490221030056
Autor:
J. Sagar, Dominic Papineau, Martin Drost, Richard Thorogate, David Kilcoyne, Bradley T. De Gregorio, Larry R. Nittler, Geoff Thornton, Hubertus Marbach, Jianhua Wang
Publikováno v:
Journal of the Geological Society. 176:651-668
Metamorphism is thought to destroy microfossils, partly through devolatilization and graphitization of biogenic organic matter. However, the extent to which there is a loss of molecular, elemental and isotope signatures from biomass during high-tempe
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b99b0f133f0028ec2490da1a34a076c5
https://doi.org/10.1144/jgs2018-097
https://doi.org/10.1144/jgs2018-097
Autor:
Zhenbing She, Jonathan O'Neil, Franco Pirajno, Matthew S. Dodd, Dominic Papineau, Juha A. Karhu, C. Manikyamba, Hanika Rizo, Yusheng Wan
Almost all evidence for the oldest traces of life on Earth rely on particles of graphitic carbon preserved in rocks of sedimentary protolith. Yet, the source of carbon in such ancient graphite is debated, as it could possibly be non-biological and/or
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ae48dcfe6c597015fa556f1603f46fa3
http://hdl.handle.net/10138/329053
http://hdl.handle.net/10138/329053
Publikováno v:
Chemical Geology. 363:185-199
Precise and accurate U-Pb LA-ICPMS dating of many U-bearing accessory minerals (e.g. apatite, allanite, titanite and rutile) is often compromised by common Pb. LA-ICPMS dating of these U-bearing accessory phases typically requires a matrix-matched st
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7a803856e506299585100f4a36a0600e
https://doi.org/10.1016/j.chemgeo.2013.11.006
https://doi.org/10.1016/j.chemgeo.2013.11.006
Publikováno v:
Contributions to Mineralogy and Petrology. 171
Plume-derived, Mg-rich, volcanic rocks (komatiites, high-Mg basalts, and their metamorphic equivalents) can record secular changes in the highly siderophile element (HSE) abundances of mantle sources. An apparent secular time-dependent enrichment tre
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f85486016b14df89540a21a1d0061e62
https://doi.org/10.1007/s00410-016-1243-y
https://doi.org/10.1007/s00410-016-1243-y
Autor:
Colin P. Groves, Andrew Y. Glikson
Publikováno v:
Climate, Fire and Human Evolution ISBN: 9783319225111
The development of isotopic age determination methods and stable isotopic tracers to paleo-climate investigations, including oxygen (δ18O), sulphur (δ33S) and carbon (δ13C), integrated with Sedimentological records and organic and biological proxi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9123cbcbdcf229d9f513d5d6bf5f9ed7
https://doi.org/10.1007/978-3-319-22512-8_1
https://doi.org/10.1007/978-3-319-22512-8_1
Publikováno v:
Geological Society of America Abstracts with Programs.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c577ce132993c0d132c6fe3b3e8d7b55
https://doi.org/10.1130/abs/2016am-283134
https://doi.org/10.1130/abs/2016am-283134
Publikováno v:
Geobiology. 9:2-9
Graphite, interpreted as altered bioorganic matter in an early Archean, ca. 3.83-Ga-old quartz-amphibole-pyroxene gneiss on Akilia Island, Greenland, has previously been claimed to be the earliest trace of life on Earth. Our petrographic and Raman sp
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::bca20a8a559135878346d3c24c0cf437
https://doi.org/10.1111/j.1472-4669.2010.00261.x
https://doi.org/10.1111/j.1472-4669.2010.00261.x
Publikováno v:
Precambrian Research. 183:25-43
Field studies integrated with cathodoluminescence petrography and SHRIMP U–Pb dating of zircons from >150 orthogneisses and metatonalites from the Eoarchaean Itsaq Gneiss Complex (southern West Greenland) shows that only a minority contain ≥3840
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6adaa01b21f27e867b68d996fa391670
https://doi.org/10.1016/j.precamres.2010.06.016
https://doi.org/10.1016/j.precamres.2010.06.016
Autor:
Bradley T. De Gregorio, Ernesto Pecoits, Andrew Steele, Rhonda M. Stroud, Kurt O. Konhauser, Jianhua Wang, Marilyn L. Fogel, Dominic Papineau
Publikováno v:
Geochimica et Cosmochimica Acta. 74:5884-5905
We present detailed petrographic surveys of apatite grains in association with carbonaceous material (CM) in two banded iron formations (BIFs) from the Paleoproterozoic of Uruguay and Michigan for comparison with similar mineral associations in the h
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::48e4e30f0cc99683a98c9521343c7236
https://doi.org/10.1016/j.gca.2010.07.002
https://doi.org/10.1016/j.gca.2010.07.002