Academia.edu no longer supports Internet Explorer.
To browse Academia.edu and the wider internet faster and more securely, please take a few seconds to upgrade your browser.
Geochimica et Cosmochimica Acta
Calcium-aluminum-rich inclusions with fractionation and unknown nuclear effects (FUN CAIs): I. Mineralogy, petrology, and oxygen isotopic compositions2014 •
2016 •
Trace elements incorporation of certain trace elements like strontium (Sr) and magnesium (Mg) among others and their isotope composition in different CaCO3 polymorphs (e.g. calcite and aragonite) as archives provide valuable for proxy information, that can be used as important tools for reconstructing the paleo- environmental conditions of the oceans throughout time. However, data on Sr incorporation into inorganic precipitated CaCO3 (calcite and aragonite), Mg incorporation into aragonite and Sr isotopic fractionation during minerals formation are still very rare. In addition, literature values available concerning Ca isotopic fractionation between calcite and aqueous solution are discrepant to a certain extent, while on the other hand the data available concerning Ca isotopic fractionation between inorganic precipitated aragonite and aqueous solution are also scarce. In order to overcome this lag of information in this study calcite and aragonite were precipitated at three differe...
Journal of Geochemical Exploration
Origin of Ca in South Indian calcretes developed on metamorphic rocks2006 •
Calcrete profiles developed on Precambrian silicate rocks in south peninsular India are studied and compared in terms of mineralogical, chemical and isotopic composition. The aim of this study is to determine the origin of calcium and the processes governing the development of a minor economic deposit in different geomorphic settings. The investigation integrates observations from an outcrop to a microfabric scale and reveals that the origin of calcium is local and linked with the weathering of the minerals of the surrounding rocks. The CaCO3 precipitation occurs after vertical and lateral translocation in the slope system.
Chemical Geology
Isotopic tracers of the origin of Ca in a carbonate crust from the Middle Atlas, Morocco2001 •
Geochimica et Cosmochimica Acta
Calcium-isotope fractionation in selected modern and ancient marine carbonates2006 •
Science Advances
Calcium isotopic evidence for the mantle sources of carbonatitesThe origin of carbonatites—igneous rocks with more than 50% of carbonate minerals—and whether they originate from a primary mantle source or from recycling of surface materials are still debated. Calcium isotopes have the potential to resolve the origin of carbonatites, since marine carbonates are enriched in the lighter isotopes of Ca compared to the mantle. Here, we report the Ca isotopic compositions for 74 carbonatites and associated silicate rocks from continental and oceanic settings, spanning from 3 billion years ago to the present day, together with O and C isotopic ratios for 37 samples. Calcium-, Mg-, and Fe-rich carbonatites have isotopically lighter Ca than mantle-derived rocks such as basalts and fall within the range of isotopically light Ca from ancient marine carbonates. This signature reflects the composition of the source, which is isotopically light and is consistent with recycling of surface carbonate materials into the mantle.
Geochimica et Cosmochimica Acta
Rate-controlled calcium isotope fractionation in synthetic calcite2004 •
A. Wagner / J. van Oorschot (ed.), The Archaeology of Mind in the Hebrew Bible
Gibt es ein Hebräisches Denken2023 •
Tra Roma e il mare. Insediamenti, trasformazioni territoriali, patrimoni culturali e ambientali, tra evo antico ed età moderna
Archeologia e Tutela. Le iniziative di Pio VII per Roma e Ostia Antica2023 •
Aufklärung: journal of philosophy
A consciência quântica como fundamento da realidade no pensamento de Amit GoswamiCritical Reviews in Food Science and Nutrition
Application of Hazard Analysis Critical Control Points (HACCP) to Organic Chemical Contaminants in Food2002 •
Artigrama 38, pp. 253-269
El jurisconsulto Tomás Martínez Galindo (1671-1736) y su promoción de las artes en Borja (Zaragoza)2023 •
Jurnal Aplikasi IPTEK Indonesia
The Contribution of Internet Utilization towards the Student Learning Outcomes2021 •
Texila International Journal of Academic Research
Patient Safety: A Systematic Review of the Literature with Evidence based Measures to Improve Patient Safety in Healthcare Settings2006 •
Revista Mediterránea de Comunicación
Más allá del recinto: el rol del audiovisual digital en el mantenimiento y la reconstrucción de la experiencia del festival de música2023 •
Chaos: An Interdisciplinary Journal of Nonlinear Science
Dynamics of quality as a strategic variable in complex food supply chain network competition: The case of fresh produce2018 •
Internet Journal of Medical Update - EJOURNAL
Book Review 29 Copyrighted © by Dr. Arun Kumar Agnihotri. All rights reserved Charles-Edouard Brown-Séquard: The Biography of a Tormented Genius by Louis-Cyril Celestin2014 •
Journal de Theorie des Nombres de Bordeaux
On a characterization of the analytic and meromorphic functions defined on some rigid domains1994 •
Northern Territory Naturalist
Orange-footed Scrubfowl in Darwin - horticultural pest or partnerHAL (Le Centre pour la Communication Scientifique Directe)
Modeling pheromone control and trapping of the Asian citrus psyllid, Diaphorina citri2021 •