NOVEL OBSERVATIONS ON BIOMINERALIZATION PROCESSES IN FORAMINIFERA AND IMPLICATIONS FOR MG/CA RATIO IN THE SHELLS
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dc.contributor.author | Bentov S. | |
dc.contributor.author | Erez J. | |
dc.date.accessioned | 2023-12-03T03:59:54Z | |
dc.date.available | 2023-12-03T03:59:54Z | |
dc.date.issued | 2005 | |
dc.identifier | https://www.elibrary.ru/item.asp?id=14645142 | |
dc.identifier.citation | Geology, 2005, 33, 11, 841-844 | |
dc.identifier.issn | 0091-7613 | |
dc.identifier.uri | https://repository.geologyscience.ru/handle/123456789/42095 | |
dc.description.abstract | Stable isotopes and trace elements in foraminifera shells are important for determining the paleochemistry of the ocean, and Mg/Ca ratios and delta(18)O values in foraminifera have recently been used to determine simultaneously the temperature and salinity of past oceans. However, large variations between species and significant Mg intra-shell heterogeneity indicate a major role for biological factors in determining the Mg/Ca ratio in foraminifera. Our novel in vivo observations on the biomineralization process of perforate foraminifera show that their calcareous wall is composed of two different calcite types: a thin, high-Mg primary layer, and low-Mg layers that cover the primary layer on both sides. The data may suggest that two biomineralization pathways are employed in the formation of the different calcite types. A new conceptual framework is provided to explain part of the Mg heterogeneity in foraminiferal shells and the variable sensitivity of the Mg/Ca ratio to temperature in different species. | |
dc.subject | foraminifera | |
dc.subject | biomineralization | |
dc.subject | Mg/Ca ratio | |
dc.subject | vital effects | |
dc.subject | paleotemperature | |
dc.title | NOVEL OBSERVATIONS ON BIOMINERALIZATION PROCESSES IN FORAMINIFERA AND IMPLICATIONS FOR MG/CA RATIO IN THE SHELLS | |
dc.type | Статья | |
dc.identifier.doi | 10.1130/G21800.1 |
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