Results 21 to 30 of about 3,800 (187)
Yankuang ceshi, 2020 OBJECTIVES The Xiuwacu Mo-W deposit is a typical hydrothermal quartz vein deposit in the Yidun island arc Cu-Mo metallogenic belt, northwest Yunnan. Numerous studies have been conducted on rock and ore chronology and petrogenesis, dynamics, but its ore ...
WANG Zhong-qiang +7 more
doaj +1 more source
Early Cambrian U-Pb zircon age and Hf-isotope data from the Guasayán pluton, Sierras Pampeanas, Argentina: implications for the northwestern boundary of the Pampean arc [PDF]
, 2016 An Early Cambrian pluton, known as the Guasayán pluton, has been identified in the central area of Sierra de Guasayán, northwestern Argentina. A U?Pb zircon Concordia age of 533 ± 4 Ma was obtained by LA-MC-ICP-MS and represents the first report of ...
Alasino, Pablo Horacio +8 more
core +2 more sources
Yankuang ceshi, 2022 BACKGROUND Sandstone-type uranium deposits contain a large number of pyrites of different shapes and stages. It is difficult to accurately discriminate the pyrite formed before, during or after the metallogenic period solely by observation of pyrite ...
ZHANG Xiaorui +11 more
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Century-scale trends and seasonality in pH and temperature for shallow zones of the Bering Sea [PDF]
, 2015 No records exist to evaluate long-term pH dynamics in high-latitude oceans, which have the greatest probability of rapid acidification from anthropogenic CO2 emissions.
Dietze, Heiner +7 more
core +1 more source
Lead isotope analysis of Meroitic period glass from Nubia with LA‐MC‐ICP‐MS
Archaeometry, 2022 AbstractAnalytical studies of glass found at sites in Nubia (ancient Sudan) have shown the variety of glass present during ancient times. This study examines Meroitic period (c.350 bce–350 ce) glass from Nubia: here categorized as low‐lead and high‐lead.
openaire +1 more source
A simplified procedure for the determination of stable chlorine isotope ratios (δ37Cl) using LA-MC-ICP-MS [PDF]
, 2008 Stable chlorine isotopes (37Cl, 35Cl) are considered as important tracers of geochemical processes, especially in subduction zone systems. However, high-quality chlorine isotope data are scarcely available.
Eisenhauer, Anton +3 more
core +1 more source
Frontiers in Chemistry, 2023 The concentration of rare earth elements (REEs) in geological materials including SLRS-6 (natural water certified reference material) and JB1b, JA1, and JG2 (Standard Rock Materials of Geological Survey of Japan) can be used as a tracer to characterize ...
Seung-Gu Lee, Kyung-Seok Ko
doaj +1 more source
UPb LA-(MC)-ICP-MS dating of rutile: New reference materials and applications to sedimentary provenance [PDF]
Chemical Geology, 2013 In response to the general lack of sufficiently abundant and high quality rutile UPb reference materials for in situ geochronology, we have characterised two new potential rutile ~ 1.8 Ga reference materials (Sugluk-4 and PCA-S207) from granulite facies belts of the Canadian Shield, namely the northern Cape Smith Belt of Quebec and the Snowbird ...
Bracciali, Laura +4 more
openaire +4 more sources
Comptes Rendus. Géoscience, 2023 This paper presents new U–Th ages obtained by LA-MC-CP-MS (laser ablation - multi-collector - inductively coupled plasma - mass spectrometry) on coral samples from a sedimentary core of the Tunis lagoon. The ages and calculated ($\mbox {}^{234}$U/$\mbox {
Condomines, Michel +3 more
doaj +1 more source
Columbite-Group Minerals from New York Pegmatites: Insights from Isotopic and Geochemical Analyses
Geosciences, 2018 Columbite crystals from niobium-yttrium-fluorine (NYF) pegmatites lacking zircon or containing metamict cyrtolite were analyzed for major and minor elements (Electron Microprobe (EMP)), trace elements (Laser Ablation-Inductively Coupled Plasma-Mass ...
Marian V. Lupulescu +4 more
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