Zobrazeno 1 - 10
of 166
pro vyhledávání: '"A. R. Chivas"'
Publikováno v:
Geochimica et Cosmochimica Acta. 329:185-205
Autor:
Paul Sotiriou, Karsten M. Haase, Kathrin P. Schneider, Anna Grosche, Kristina Noebel, Allan R. Chivas
Publikováno v:
Contributions to Mineralogy and Petrology. 177
The Pleistocene (2.2–1.5 Ma) Koloula Igneous Complex (KIC) on Guadalcanal in the Solomon island arc consists of a low-K calc-alkaline sequence of ultramafic to felsic plutonic rocks. We present whole-rock major and trace element and Sr–Nd-Pb isot
Autor:
Allen P. Nutman, Clark R.L. Friend, Allan R. Chivas, Martin J. Van Kranendonk, Vickie C. Bennett
Publikováno v:
American Journal of Science. 321:643-679
The arcuate, 35 km long Isua supracrustal belt (ISB, southern West Greenland) contains the world9s largest remnants of Eoarchean volcanic and sedimentary sequences. The ISB is broadly divided into: (i) the northern Inner Arc Group of 3720 to 3690 Ma
Publikováno v:
Journal of Limnology, Vol 75, Iss 2 (2015)
Quantitative descriptions of foodweb structure based on isotope niche space require knowledge of producers’ isotopic signatures. In freshwater ecosystems charophytes are one of the main components of submerged vegetation and the feeding base for ma
Externí odkaz:
https://doaj.org/article/c912e5dafeff4a5993c5e5283da20c73
Autor:
Florian W. Dux, Behrooz Karamiqucham, David J Wheeler, Allan R. Chivas, Robert P. Bourman, Solomon Buckman
Publikováno v:
Geomorphology. 328:108-117
Oxygen isotope-inferred ages as old as the Jurassic have been derived from weathered monzogranite underlying the folded Mount Augustus Sandstone, which forms the massive anticlinal Burringurrah (or Mount Augustus) inselberg, in the Gascoyne district
Autor:
Anthony Dosseto, Ashley Martin, Leslie Kinsley, Jan-Hendrik May, John D. Jansen, Allan R. Chivas
Publikováno v:
N. Martin, A, Dosseto, A, May, J H, Jansen, J, P. J. Kinsley, L & R. Chivas, A 2019, ' Sediment residence times in catchments draining to the Gulf of Carpentaria, northern Australia inferred by uranium comminution dating ', Geochimica et Cosmochimica Acta, vol. 244, pp. 264-291 . https://doi.org/10.1016/j.gca.2018.09.031
Uranium (U) isotopes are useful for constraining the timescales of weathering and erosion processes. The (234U/238U) activity ratio (parentheses denote activity ratio) of fine-grained detrital minerals is proposed to record the time elapsed since min
Autor:
Tim J. Cohen, Lee J. Arnold, Fernando Gázquez, Jan-Hendrik May, Sam K. Marx, Nathan R. Jankowski, Allan R. Chivas, Adriana Garćia, Haidee Cadd, Adrian G. Parker, John D. Jansen, Xiao Fu, Nicolas Waldmann, Gerald C. Nanson, Brian G. Jones, Patricia Gadd
Publikováno v:
Quaternary Science Reviews. 292:107635
Autor:
Mika Rizki Puspaningrum, Allan R. Chivas, Iwan Kurniawan, Unggul P. Wibowo, Yahdi Zaim, Gerrit D. Van den Bergh
Publikováno v:
Berita Sedimentologi. 47:79-80
Sulawesi is known for its complex geological and biogeographic history, which is reflected in their extinct and extant faunal assemblage. Evidence of oldest terrestrial fauna in Sulawesi was found in the Early Pleistocene sediment and evolved since t
Stromatolites represent some of the earliest evidence for life and are valuable geochemical archives for understanding the rise of oxygen on early Earth. Metal redox proxies in carbonates, such as stable uranium isotopes (238U/235U), are useful for a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b308d8e491f093e9ba9ab76fbee0a6df
https://doi.org/10.5194/egusphere-egu21-14810
https://doi.org/10.5194/egusphere-egu21-14810
Autor:
David M. Price, David Phillips, Masahiko Honda, Anthony Dosseto, Allan R. Chivas, Venera R. May, E.L. Matchan
Publikováno v:
Journal of South American Earth Sciences. 84:88-103
The Payenia Basaltic Province (PBP) is the largest and the northernmost of the Quaternary back-arc Patagonian basaltic provinces in South America. In the last 10 years, several studies have investigated either, the geochemistry or the geochronology o