Showing 101 - 120 results of 190 for search '"Geochemistry"', query time: 0.06s Refine Results
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    Late Ediacaran juvenile magmatism in the Variscan Monts-du-Lyonnais metamorphic complex (Massif Central, France) by Couzinié Simon, Laurent Oscar, Bouilhol Pierre, Chelle-Michou Cyril, Ganzhorn Anne-Céline, Gardien Véronique, Moyen Jean-François

    Published 2024-01-01
    “…LA–ICP–MS zircon U–Pb dating reveals a latest Ediacaran (c. 545 Ma) crystallization age for the melt that yielded the tonalites. Whole-rock geochemistry (notably pronounced Nb negative anomalies) and the highly radiogenic zircon Hf isotope compositions, with εHf(545Ma) of c. +11 (within the range expected for the Depleted Mantle reservoir), indicate that the parental melt of the tonalites ultimately originated from a mantle source metasomatized by oceanic slab-derived fluids. …”
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    Petrology of Oligocene Lalehzar igneous rocks in the southeast of Saveh-Naein-Jiroft magmatic belt by Fatemeh Sepidbar, Bahareh Borouzi Niyat

    Published 2024-12-01
    “…In this study, zircon U-Pb dating, and whole-rock geochemistry and Sr-Nd isotopic analyzes were performed on granitoid rocks (granite and granodiorite) and associated volcanics. …”
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    Gas Chromatography Coupled to High Resolution Time-of-Flight Mass Spectrometry as a High-Throughput Tool for Characterizing Geochemical Biomarkers in Sediments by Hector Henrique Ferreira Koolen, Clécio Fernando Klitzke, Joe Binkley, Jeffrey Patrick, Ana Cecília Rizatti de Albergaria-Barbosa, Rolf Roland Weber, Márcia Caruso Bícego, Marcos Nogueira Eberlin, Giovana Anceski Bataglion

    Published 2018-01-01
    “…GC-HRTofMS reduces both sample preparation time and the number of chromatographic runs compared to traditional methodologies used in organic geochemistry. Particularly, the approach based on in-situ derivatization thermal desorption represents a very simple method that can be performed in-line employing few milligrams of sediment, eliminating the need for any sample preparation and solvent use. …”
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    À propos de quelques outils de collecte de données : réflexions sur les pratiques numériques en archéologie by Christophe Tufféry, Vincent Delvigne, Paul Fernandes, Céline Bressy-Léandri

    Published 2021-05-01
    “…They concern the design and implementation of such devices for researchers from heterogeneous disciplinary horizons (archaeology, prehistory, geography, petrography, mineralogy, geochemistry, etc.); their practices are modified, to a variable extent, by the conditions and contexts in which these digital devices are implemented.…”
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    Influence of minor hydrocarbon seepage on sulfur cycling in marine subsurface sediments by E. Schnabel, A. Vuillemin, C. C. Laczny, B. J. Kunath, A. R. Soares, A. J. Probst, R. Di Primio, J. Kallmeyer

    Published 2025-02-01
    “…However, these low and often unnoticed upward HC fluxes still influence the geochemistry of surrounding sediments and potentially stimulate metabolic activity by microbial populations in shallow subseafloor environments.…”
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    Defining geosciences research data through metadata reuse: by Alexandre Ribas Semeler, Luana Farias Sales, Adilson Luiz Pinto, Roberta Pereira da Silva de Paula, Valquer Cleyton Paes Gandra, Heloisa Costa

    Published 2025-02-01
    “…The data come from a range of disciplines, including geochemistry, atmospheric science, paleontology, oceanography, geophysics, and hydrology, using technologies such as satellites, electronics microscopes, climate sensors, ships, computer modeling, and others. …”
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