New petrographic and geochemical insights on diagenesis and palaeoenvironmental stress in Late Cretaceous inoceramid shells from the James Ross Basin, Antarctica
New petrographic and geochemical insights from inoceramid bivalve shells of lower Campanian (Marambio Group, James Ross Basin, Antarctica) show that they suffered significant palaeoenvironmental stress just before their disappearance in the southern high latitudes. Inoceramid data have mainly been d...
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ftconicet:oai:ri.conicet.gov.ar:11336/162483 2023-10-09T21:45:35+02:00 New petrographic and geochemical insights on diagenesis and palaeoenvironmental stress in Late Cretaceous inoceramid shells from the James Ross Basin, Antarctica Álvaro,Jimenez Berrocoso Olivero, Eduardo Bernardo Elorza, Javier application/pdf http://hdl.handle.net/11336/162483 eng eng Cambridge University Press info:eu-repo/semantics/altIdentifier/doi/10.1017/S0954102006000411 info:eu-repo/semantics/altIdentifier/url/https://www.cambridge.org/core/journals/antarctic-science/article/abs/new-petrographic-and-geochemical-insights-on-diagenesis-and-palaeoenvironmental-stress-in-late-cretaceous-inoceramid-shells-from-the-james-ross-basin-antarctica/4A37DF2E7538E879E0F15C7E4B55CF21 http://hdl.handle.net/11336/162483 Álvaro,Jimenez Berrocoso; Olivero, Eduardo Bernardo; Elorza, Javier; New petrographic and geochemical insights on diagenesis and palaeoenvironmental stress in Late Cretaceous inoceramid shells from the James Ross Basin, Antarctica; Cambridge University Press; Antarctic Science; 18; 3; 12-2006; 357-376 0954-1020 CONICET Digital CONICET info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by-nc-sa/2.5/ar/ CAMPANIAN CATHODOLUMINESCENCE GEOCHEMISTRY INOCERAMID EXTINCTION LOW MG CALCITE MICROSTRUCTURE SHELL GROWTH https://purl.org/becyt/ford/1.5 https://purl.org/becyt/ford/1 info:eu-repo/semantics/article info:ar-repo/semantics/artículo info:eu-repo/semantics/publishedVersion ftconicet https://doi.org/10.1017/S0954102006000411 2023-09-24T20:11:17Z New petrographic and geochemical insights from inoceramid bivalve shells of lower Campanian (Marambio Group, James Ross Basin, Antarctica) show that they suffered significant palaeoenvironmental stress just before their disappearance in the southern high latitudes. Inoceramid data have mainly been derived from shell fragments of the large form Antarcticeramus rabotensis Crame & Luther, collected at stratigraphical levels marking the early disappearance of inoceramids in the James Ross Basin (10 m.y. before the Cretaceous/Tertiary boundary in Antarctica). Cathodoluminescence studies and minor and trace element intra-shell variations in A. rabotensis shells, along with their whole shell geochemistry (major, minor, and trace elements, including REE), have revealed evidence of only weak diagenesis but significant palaeoenvironmental stress. The most relevant evidence of such adverse palaeoenvironmental conditions in A. rabotensis shells is reflected by marked growth interruptions in the normal shell layering, including the occurrence of a previously undetected inner aragonitic nacreous layer formed of alternating aragonitic and calcitic sublayers. The weak diagenesis produced characteristic geochemical intra-shell variations which have subsequently been detected in the inoceramid shell microstructure, specially in the inner aragonitic nacreous layer. Fil: Álvaro,Jimenez Berrocoso. Universidad del País Vasco; España Fil: Olivero, Eduardo Bernardo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Austral de Investigaciones Científicas; Argentina Fil: Elorza, Javier. Universidad del País Vasco; España Article in Journal/Newspaper Antarc* Antarctic Science Antarctica CONICET Digital (Consejo Nacional de Investigaciones Científicas y Técnicas) Austral Argentina Marambio ENVELOPE(-56.750,-56.750,-64.283,-64.283) Olivero ENVELOPE(-63.600,-63.600,-66.133,-66.133) Antarctic Science 18 3 357 376 |
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Open Polar |
collection |
CONICET Digital (Consejo Nacional de Investigaciones Científicas y Técnicas) |
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ftconicet |
language |
English |
topic |
CAMPANIAN CATHODOLUMINESCENCE GEOCHEMISTRY INOCERAMID EXTINCTION LOW MG CALCITE MICROSTRUCTURE SHELL GROWTH https://purl.org/becyt/ford/1.5 https://purl.org/becyt/ford/1 |
spellingShingle |
CAMPANIAN CATHODOLUMINESCENCE GEOCHEMISTRY INOCERAMID EXTINCTION LOW MG CALCITE MICROSTRUCTURE SHELL GROWTH https://purl.org/becyt/ford/1.5 https://purl.org/becyt/ford/1 Álvaro,Jimenez Berrocoso Olivero, Eduardo Bernardo Elorza, Javier New petrographic and geochemical insights on diagenesis and palaeoenvironmental stress in Late Cretaceous inoceramid shells from the James Ross Basin, Antarctica |
topic_facet |
CAMPANIAN CATHODOLUMINESCENCE GEOCHEMISTRY INOCERAMID EXTINCTION LOW MG CALCITE MICROSTRUCTURE SHELL GROWTH https://purl.org/becyt/ford/1.5 https://purl.org/becyt/ford/1 |
description |
New petrographic and geochemical insights from inoceramid bivalve shells of lower Campanian (Marambio Group, James Ross Basin, Antarctica) show that they suffered significant palaeoenvironmental stress just before their disappearance in the southern high latitudes. Inoceramid data have mainly been derived from shell fragments of the large form Antarcticeramus rabotensis Crame & Luther, collected at stratigraphical levels marking the early disappearance of inoceramids in the James Ross Basin (10 m.y. before the Cretaceous/Tertiary boundary in Antarctica). Cathodoluminescence studies and minor and trace element intra-shell variations in A. rabotensis shells, along with their whole shell geochemistry (major, minor, and trace elements, including REE), have revealed evidence of only weak diagenesis but significant palaeoenvironmental stress. The most relevant evidence of such adverse palaeoenvironmental conditions in A. rabotensis shells is reflected by marked growth interruptions in the normal shell layering, including the occurrence of a previously undetected inner aragonitic nacreous layer formed of alternating aragonitic and calcitic sublayers. The weak diagenesis produced characteristic geochemical intra-shell variations which have subsequently been detected in the inoceramid shell microstructure, specially in the inner aragonitic nacreous layer. Fil: Álvaro,Jimenez Berrocoso. Universidad del País Vasco; España Fil: Olivero, Eduardo Bernardo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Austral de Investigaciones Científicas; Argentina Fil: Elorza, Javier. Universidad del País Vasco; España |
format |
Article in Journal/Newspaper |
author |
Álvaro,Jimenez Berrocoso Olivero, Eduardo Bernardo Elorza, Javier |
author_facet |
Álvaro,Jimenez Berrocoso Olivero, Eduardo Bernardo Elorza, Javier |
author_sort |
Álvaro,Jimenez Berrocoso |
title |
New petrographic and geochemical insights on diagenesis and palaeoenvironmental stress in Late Cretaceous inoceramid shells from the James Ross Basin, Antarctica |
title_short |
New petrographic and geochemical insights on diagenesis and palaeoenvironmental stress in Late Cretaceous inoceramid shells from the James Ross Basin, Antarctica |
title_full |
New petrographic and geochemical insights on diagenesis and palaeoenvironmental stress in Late Cretaceous inoceramid shells from the James Ross Basin, Antarctica |
title_fullStr |
New petrographic and geochemical insights on diagenesis and palaeoenvironmental stress in Late Cretaceous inoceramid shells from the James Ross Basin, Antarctica |
title_full_unstemmed |
New petrographic and geochemical insights on diagenesis and palaeoenvironmental stress in Late Cretaceous inoceramid shells from the James Ross Basin, Antarctica |
title_sort |
new petrographic and geochemical insights on diagenesis and palaeoenvironmental stress in late cretaceous inoceramid shells from the james ross basin, antarctica |
publisher |
Cambridge University Press |
url |
http://hdl.handle.net/11336/162483 |
long_lat |
ENVELOPE(-56.750,-56.750,-64.283,-64.283) ENVELOPE(-63.600,-63.600,-66.133,-66.133) |
geographic |
Austral Argentina Marambio Olivero |
geographic_facet |
Austral Argentina Marambio Olivero |
genre |
Antarc* Antarctic Science Antarctica |
genre_facet |
Antarc* Antarctic Science Antarctica |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1017/S0954102006000411 info:eu-repo/semantics/altIdentifier/url/https://www.cambridge.org/core/journals/antarctic-science/article/abs/new-petrographic-and-geochemical-insights-on-diagenesis-and-palaeoenvironmental-stress-in-late-cretaceous-inoceramid-shells-from-the-james-ross-basin-antarctica/4A37DF2E7538E879E0F15C7E4B55CF21 http://hdl.handle.net/11336/162483 Álvaro,Jimenez Berrocoso; Olivero, Eduardo Bernardo; Elorza, Javier; New petrographic and geochemical insights on diagenesis and palaeoenvironmental stress in Late Cretaceous inoceramid shells from the James Ross Basin, Antarctica; Cambridge University Press; Antarctic Science; 18; 3; 12-2006; 357-376 0954-1020 CONICET Digital CONICET |
op_rights |
info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by-nc-sa/2.5/ar/ |
op_doi |
https://doi.org/10.1017/S0954102006000411 |
container_title |
Antarctic Science |
container_volume |
18 |
container_issue |
3 |
container_start_page |
357 |
op_container_end_page |
376 |
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1779320028844261376 |