Results 61 to 70 of about 5,717 (242)

Identification of multiple natural and anthropogenic sources of dust in snow from Zhongshan Station to Dome A, East Antarctica

Journal of Glaciology, 2018
The stable oxygen isotope composition, major ions and isotopic compositions of strontium (Sr), neodymium (Nd) and lead (Pb) in insoluble dust from recent surface snow samples along the transect from the Zhongshan and Progress stations (located on the ...
ZHIHENG DU, CUNDE XIAO, MINGHU DING, CHUANJIN LI   +3 more
doaj   +1 more source

Image_3_Characterization of Nd Radiogenic Isotope Signatures in Sediments From the Southwestern Atlantic Margin.JPEG [PDF]

, 2018
Based on radiogenic isotope systems of neodymium [Epsilon Neodymium-εNd(0), 143Nd/144Nd, 147Sm/144Nd, and Sm-Nd Depleted Mantle Model ages-TDM] from current and previous data of continental rocks and associated sediments, this work provides the ...
Colombo C. G. Tassinari (5392412), Michel M. De Mahiques (5392418), Luigi Jovane (2840711), Everton Bongiolo (4820742), Simone S. Mantovanelli (5392415)   +4 more
core   +1 more source

Stable and radiogenic isotope composition of salar deposits in the Central Andes [PDF]

, 2021
The Central Andes of South America hosts the largest known lithium anomalies in a restricted area, but the primary lithium sources of the salar deposits and the mobilization process of lithium are still a matter of speculation.
Lucassen, Friedrich, Alonso, Ricardo N, Meixner, Anette, Korte, Laura F, Kasemann, Simone A   +4 more
core   +1 more source

Subduction Initiation and Early Subduction Zone Development: Insights From the P–T–t Path of the Bay of Islands Metamorphic Sole

Journal of Metamorphic Geology, EarlyView.
ABSTRACT The processes involved during subduction initiation (SI) remain poorly constrained, in part due to the rarity of geological archives. Ophiolites and their underlying metamorphic soles are thought to form during subduction zone infancy and may thus provide critical constraints. Metamorphic soles are derived from oceanic crust of the lower plate
François Fournier‐Roy, Carl Guilmette, Mark Coleman, Kyle Larson, Douglas K. Tinkham, Alana M. Hinchey, John Wakabayashi, Jean H. Bédard, Louise Mérit, Philippe Agard, Loïc Labrousse, Antoine Godet   +11 more
wiley   +1 more source

U–Pb geochronology of carbonate-hosted Pb–Zn ores reveals plate-tectonic evolution of eastern Asia during the early Paleozoic

Scientific Reports
The Mississippi Valley–type (MVT) deposits reached their maximum abundance during the final assembly of Pangea. The intense orogenic activity during this assembly in relatively low latitudes created abundant opportunities for the migration of sedimentary
Bin Li, Wen-Dong Zhang, Jian-Xin Zhao, Peng Liu, Jing-Ping Feng, Yue-Xing Feng, Yang Xiao   +6 more
doaj   +1 more source

Cu‐Isotope Evidence for Subduction Modification of Lithospheric Mantle

Geochemistry, Geophysics, Geosystems, 2022
Ultramafic xenoliths from southeastern Arizona, USA, provide evidence for Cu‐isotope heterogeneity in the lithospheric mantle. We report new data on Type I (Cr‐, Mg‐rich) peridotites, but also the first Cu‐isotope data for Fe‐Ti‐Al‐rich Type II ...
Pamela D. Kempton, Ryan Mathur, Russell S. Harmon, Aaron Bell, Jochen Hoefs, Barry Shaulis   +5 more
doaj   +1 more source

Thermal histories of El Médano 300 (EM 300) and Northwest Africa 8155 (NWA 8155): Implications for the diversity of IAB‐ungrouped iron meteorites and their parent bodies

Meteoritics &Planetary Science, EarlyView.
Abstract This study provides the first petrographic, crystallographic, and chemical comparison between El Médano 300 (EM 300) and Northwest Africa 8155 (NWA 8155), two particular IAB‐ungrouped iron meteorites. Both contain exceptionally large graphite nodules and “flowers”, providing unique insights into carbon behavior in metallic melts and cooling ...
L. Perez, M. Roskosz, F. Danoix, L. Kern, V. Megevand, C. Brillatz, B. Devouard, J. Gattacceca, M. Gounelle   +8 more
wiley   +1 more source

Radiogenic isotope investigation of the St‐Robert H5 fall [PDF]

Meteoritics & Planetary Science, 2004
Abstract— The St‐Robert H5 chondrite yields a mineral/whole‐rock Pb‐Pb age of 4565 ± 23 Ma (2σ) comparable to the accepted age of most chondrites. The regression of chondrule data give a similar age of 4566 ± 7 Ma (2σ). These results imply that no major perturbation affected the Pb‐Pb systematics of this meteorite's parent body within the first few ...
Poirier, André, Doucelance, Régis, Gariépy, Clément   +2 more
openaire   +2 more sources

Stardust Mine: A 2024 gabbroic shergottite from Arizona, USA

Meteoritics &Planetary Science, EarlyView.
Abstract This study provides an initial characterization of Stardust Mine, a fresh gabbroic enriched shergottite collected in Arizona, USA, in September 2024 and is the first Martian meteorite to be unequivocably collected on US soil. Analysis was conducted on the type specimen and finds that Stardust Mine is composed of equal proportions of pyroxene ...
Jennifer T. Mitchell, Natasha R. Stephen, Zsuzsanna P. Allerton, Weiming Ding, Xin‐Yuan Zheng   +4 more
wiley   +1 more source

Correction: (LA)-MC-ICPMS/MS measurement of Sr radiogenic isotope ratios [PDF]

International audienceCorrection for ‘(LA)-MC-ICPMS/MS measurement of Sr radiogenic isotope ratios’ by Philippe Télouk et al. , J. Anal. At. Spectrom.
Balter, Vincent, Télouk, Philippe
core   +1 more source