Zobrazeno 1 - 10
of 14
pro vyhledávání: '"Alessandro Bragagni"'
Publikováno v:
Geochimica et Cosmochimica Acta. 344:40-58
Autor:
Riccardo Lanari, Anda Buzenchi, Alessandro Bragagni, Bruno Dhuime, Mauro Brilli, Chiara Del Ventisette, Massimo Mattei, Sandro Conticelli, Riccardo Avanzinelli
The application of U-Pb dating method performed on calcite has exponentially increased over the last years, since constraining the age of the crystallization for such syn-kinematic minerals, would provide a specific timing of faults movement. The pot
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::74442cd967a2f249cbcbb6d534822d63
https://doi.org/10.5194/egusphere-egu23-265
https://doi.org/10.5194/egusphere-egu23-265
Autor:
Eleonora Braschi, Alessandro Bragagni, Andrea Orlando, Luisa Guarnieri, Giacomo Corti, Simone Tommasini
The East African Rift System (EARS) is the classic example of an active continental rift where extensional tectonics and lithospheric thinning have been closely associated to the generation of large volumes of magmas and represents the environment wi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::84900d2d744e263aa8f617abb423dce4
https://doi.org/10.5194/egusphere-egu23-9826
https://doi.org/10.5194/egusphere-egu23-9826
Upper mantle control on the W isotope record of shallow level plume and intraplate volcanic settings
Autor:
Mike W. Jansen, Jonas Tusch, Carsten Münker, Alessandro Bragagni, Riccardo Avanzinelli, Filippo Mastroianni, Finlay M. Stuart, Florian Kurzweil
Several studies have revealed small heterogeneities in the relative abundance of 182W, the radiogenic nuclide of short-lived 182Hf (t1/2 = ∼9 Ma), in terrestrial rocks. Whereas the majority of Archean rocks display 182W excesses relative to bulk si
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ac5a78e19bb3bd4688d8558d328c3eea
http://hdl.handle.net/2158/1265501
http://hdl.handle.net/2158/1265501
Autor:
Alessandro Bragagni
Figures S1 and S2, Tables S1 and S2, analytical methods, and references for the literature data reported in the figures.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::78e21ecb14254463cdfa4bc99fc93c3d
https://doi.org/10.1130/geol.s.17265194
https://doi.org/10.1130/geol.s.17265194
Autor:
Alessandro Bragagni, G. M. Nowell, Alexander Heuser, Iris M. Speelmanns, Ashlea N. Wainwright, D. van Acken, Raúl O.C. Fonseca, Ambre Luguet
Publikováno v:
Chemical Geology. 493:426-440
Two Fe-Ni sulfides, resembling the chemical composition of a typical mantle base metal sulfide (BMS), were synthesized and used to test micro-analytical procedures (sample digestion and chemical separation) to determine Os-187/Os-188 and highly sider
Autor:
Alessandro Bragagni, Hassan M. Helmy
Publikováno v:
Geochimica et Cosmochimica Acta. 216:169-183
The platinum-group element (PGE) contents in magmatic ores and rocks are normally in the low μg/g (even in the ng/g) level, yet they form discrete platinum-group mineral (PGM) phases. IPGE (Os, Ir, Ru) + Rh form alloys, sulfides, and sulfarsenides w
Autor:
Alessandro Bragagni, Felipe Padilha Leitzke, Karoline Brückel, Raúl O.C. Fonseca, Iris M. Speelmanns, Ashlea N. Wainwright
Publikováno v:
Geochimica et Cosmochimica Acta. 216:184-200
Although Earth’s continental crust is thought to derive from melting of the Earth’s mantle, how the crust has formed and the timing of its formation are not well understood. The main difficulty in understanding how the crust was extracted from th
Autor:
D.G. Pearson, Raúl O.C. Fonseca, Jean-Pierre Lorand, Ambre Luguet, G. M. Nowell, Bruce A. Kjarsgaard, Alessandro Bragagni
Publikováno v:
Geochimica et Cosmochimica Acta. 216:264-285
We report detailed petrographic investigations along with 187Os/188Os data in Base Metal Sulfide (BMS) on four cratonic mantle xenoliths from Somerset Island (Rae Craton, Canada). The results shed light on the processes affecting the Re-Os systematic