2020-7-1 Rare earth elements (REEs) in Archean and Proterozoic marine carbonates have commonly been used to gain insights into the nature of the seawater in which they formed (e.g., Bolhar et al., 2004, Bolhar and Van Kranendonk, 2007, Frimmel, 2009, Tang et
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rare earth element geochemistry of limestones. J. Armstrong-Altrin. Related Papers. Geochemistry of Neoproterozoic limestones of the Shahabad Formation, Bhima Basin, Karnataka, southern India . By John S. Armstrong-Altrin.
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2021-8-9 The Triassic carbonate rocks on the Avroman mountain, Halabja area, consist of massive gray-dark gray-colored detrital and biogenic limestones, that are stratigraphically represented by the Avroman formation in Iraq and Biston formation in Iran. This study focused on the tectonic setting and environmental conditions during the deposition of the formation using
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2019-1-29 @article{osti_1573909, title = {Rare earth elements and radiogenic strontium isotopes in carbonate minerals reveal diagenetic influence in shales and limestones in the Appalachian Basin}, author = {Phan, Thai T. and Hakala, J. Alexandra and Lopano, Christina L. and Sharma, Shikha}, abstractNote = {Rare earth element (REE) signatures are often applied to interpret
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Rare earth elements (REE) have been determined in 15 samples from three metamorphosed limestone units of the Appin Group of the Dalradian of north-east Scotland. Total REE contents range from about 7 to about 50 ppm and the light REEs are slightly enriched compared with REE in the North American Shale Composite (NASC). In the more impure limestones, the dominant
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1981-1-1 Rare-earth and minor element distribution and petrographic features of fluorites and associated Mesozoic limestones of northwestern Sicily ☆ Author links open overlay panel A. Bellanca 1 P. Di Salvo 1 P. Möller 2 R. Neri 1 F. Schley 2
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2004-1-15 Rare earth element and yttrium (REE+Y) concentrations were determined in 49 Late Devonian reefal carbonates from the Lennard Shelf, Canning Basin, Western Australia. Shale-normalized (SN) REE+Y patterns of the Late Devonian samples display features consistent with the geochemistry of well-oxygenated, shallow seawater.
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2020-7-1 Rare earth elements in dolostones and limestones from the Mesoproterozoic Gaoyuzhuang Formation, North China: Implications for penecontemporaneous Journal of Asian Earth Sciences ( IF 3.449Pub Date : 2020-07-01, DOI: 10.1016/j
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2019-5-24 Rare Earth Elements and Yttrium (REY) Geochemistry and their paleoenvironment implications of Reefal Limestones in the Ordovician, Tarim Basin, NW China Miaomiao Menga, b,Xinxing Liub*,Tailiang Fanc,Ian J. Duncand a. Guangzhou Marine Geological Survey, China Geological Survey, Guangzhou 510760, China b.
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2017-4-1 Composition of major, trace and rare-earth elements of limestones deposited in various depositional environments, normalized to PAAS (Taylor and McLennan, 1985). The data include the analysis on the Tibetan samples by this study and those literature geochemical data by Deep Sea Drilling Project and Ocean Drilling Program (DSDP and ODP ...
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2019-3-30 Rare earth elements and radiogenic strontium isotopes in carbonate minerals reveal diagenetic influence in shales and limestones in the Appalachian Basin. Author links open overlay panel Thai T. Phan a b c J. Alexandra Hakala a Christina L.
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Rare earth element geochemistry in carbonate rocks is utilized increasingly for studying both modern oceans and palaeoceanography, with additional applications for investigating water–rock interactions in groundwater and carbonate diagenesis. ... thus providing support for the use of ancient marine limestones as proxies for marine rare earth ...
More2019-5-24 Rare Earth Elements and Yttrium (REY) Geochemistry and their paleoenvironment implications of Reefal Limestones in the Ordovician, Tarim Basin, NW China Miaomiao Menga, b,Xinxing Liub*,Tailiang Fanc,Ian J. Duncand a. Guangzhou Marine Geological Survey, China Geological Survey, Guangzhou 510760, China b.
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REE (rare earth elements) and Sr isotopic studies for the limestones have been made in order to know their geochemical characteristics, ages and origins. Their 87 Sr/ 86 Sr ratios, when referred to the seawater 87 Sr/ 86 Sr curve and relevant geological data, suggest that Ishimaki and Tahara limestones are the late Permian and the Carboniferous ...
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Rare Earth Elements and Yttrium(REY) Geochemistry of Reefal Limestones in the Ordovician, Tarim Basin, NW China and their Paleoenvironment Implications MENG Miaomiao LIU Xinxing FAN Tailiang Ian J.DUNCAN
MoreRare earth elements (REE) have been determined in 15 samples from three metamorphosed limestone units of the Appin Group of the Dalradian of north-east Scotland. Total REE contents range from about 7 to about 50 ppm and the light REEs are slightly enriched compared with REE in the North American Shale Composite (NASC). In the more impure limestones, the dominant
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2011-4-6 Major, trace and rare earth element (REE) geochemistry of carbonate rocks of the Neoproterozoic Shahabad Formation, southern India were studied in order to investigate the depositional environment and source for the REEs. The PAAS (Post Archaean Australian Shale) normalized REE + Y pattern of Shahabad limestones have consistent seawater-like pattern
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2013-4-27 Major, trace and rare earth elements were measured in 27 samples of the Middle to Late Permian limestones from the Tieqiao section located on the marginal zone of an isolated platform (Laibin, South China). Shale-normalized REE+Y patterns of all samples show notably negative Ce anomalies (0.21–0.66, average 0.33), slightly positive Gd anomalies (1.08–1.30,
MoreConcentrations of major, trace, and rare-earth elements (REE) were measured in shallow marine limestone samples of the upper Miocene Kudankulam
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2022-1-12 REE + Y concentrations of limestones deposited in open ocean environments of the Pacific, Atlantic, and Indian Oceans and central Tibetan Meso-Tethyan oceanic plateau, normalized to PAAS (Taylor ...
MoreREE (rare earth elements) and Sr isotopic studies for the limestones have been made in order to know their geochemical characteristics, ages and origins. Their 87 Sr/ 86 Sr ratios, when referred to the seawater 87 Sr/ 86 Sr curve and relevant geological data, suggest that Ishimaki and Tahara limestones are the late Permian and the Carboniferous ...
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2020-5-25 The REE analyses show the depletion of light rare earth elements, positive La anomalies, and negative Gd anomalies. Moderately negative δCe anomalies indicate that the limestones are most likely formed in an oxidized setting, typically a shallow marine environment.
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Rare Earth Elements and Yttrium (REY) Geochemistry of Reefal Limestones in the Ordovician, Tarim Basin, NW China and their Paleoenvironment Implications Miaomiao MENG Guangzhou Marine Geological Survey, China Geological Survey, Guangzhou 510760 China
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The “tetrad” effect is found in the rare earth elements (La-Lu) and results from increased stability at quarter, half, three-quarter, and complete filling of the 4f electron shell.
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Rare earth element geochemistry of Late Devonian reefal carbonates, Canning Basin, Western Australia: Confirmation of a seawater REE proxy in ancient limestones January 2004
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2020-9-2 Neodymium isotope composition of micritic limestones from the Devonian–Carboniferous carbonate platform of the Greater Karatau (southern Kazakhstan) was investigated to test the ability of calcite micrite to archive Nd isotope signatures of seawater. The carbonate fraction that displays seawater-like rare earth element (REE+Y) signatures is often
MoreThe Mesoproterozoic Gaoyuzhuang Formation (1.54-1.6 Ga), which is up to 1543 m thick, is a dolostone-dominated succession that originated in the Yanshan-liaoxi rift zone. In ascending order, this formation comprises Members 1 to 4. Member 1 is formed of clastic rocks and dolostones, whereas Members 2 and 4 are formed largely of dolostones. Member 3, which is
More2022-1-12 REE + Y concentrations of limestones deposited in open ocean environments of the Pacific, Atlantic, and Indian Oceans and central Tibetan Meso-Tethyan oceanic plateau, normalized to PAAS (Taylor ...
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2020-12-7 the limestones of Ewekoro Formation were deposited in restricted to open shallow marine environments under fluctuating oxidizing to anoxic conditions. Keywords: Ewekoro Formation, Rare Earth Elements, Depositional Condition, Provenance, Dahomey Basin. ABSTRACT 669 INTRODUCTION Geochemistry of sedimentary rocks is a valuable
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Limestone is a very common sedimentary rock consisting of calcium carbonate (more than 50%). It is the most common non-siliciclastic (sandstone and shale are common siliciclastic rocks) sedimentary rock.Limestones are rocks that are
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