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Geochemical approach (carbon isotopes and iridium) for the Cretaceous/Paleocene boundary in the Oman Mountains; a catastrophic event in a geological succession of events from the Maastrichtian to the Danian

Laurence Le Callonnec, Maurice Renard, Robert Rocchia, Chantal Bourdillon, Bruno Galbrun, Philippe Razin and Jack Roger
Approche geochimique (isotopes du carbone et iridium) de la limite Cretace/Paleocene dans les montagnes d'Oman; un evenement "catastrophique" au sein d'une succession d'evenements geologiques au cours du Maastrichtien et du Danien
Bulletin de la Societe Geologique de France (July 1998) 169 (4): 503-514

Abstract

In Oman, the sedimentary basins located along the edges of the Oman Mountain chain show continuous sedimentation at the K/T boundary. Two distinct sedimentary palaeoenvironments have been analysed. In the northwestern flank of the Oman Mountains (near Buraymi), the K/T boundary occurs within hemipelagic deposits, whereas in the Abat basin (southeastern flank), it occurs within confined carbonate platform facies. The negative delta (super 13) C shift and the positive iridium anomaly, which characterize the global geochemical events of the K/T boundary in marine sections, have been detected in Oman. Moreover this isotopic signature is not the only event recorded in these sections. Some other important shifts have been recognized in the Upper Maastrichtian and Lower Danian sediments. These shifts are related to some palaeogeographical events such as platform flexuration which correspond to some regional tectonic reajustments.


ISSN: 0037-9409
EISSN: 1777-5817
Coden: #02538
Serial Title: Bulletin de la Societe Geologique de France
Serial Volume: 169
Serial Issue: 4
Title: Approche geochimique (isotopes du carbone et iridium) de la limite Cretace/Paleocene dans les montagnes d'Oman; un evenement "catastrophique" au sein d'une succession d'evenements geologiques au cours du Maastrichtien et du Danien
Translated Title: Geochemical approach (carbon isotopes and iridium) for the Cretaceous/Paleocene boundary in the Oman Mountains; a catastrophic event in a geological succession of events from the Maastrichtian to the Danian
Affiliation: Departement de Geologie Sedimentaire, Paris, France
Pages: 503-514
Published: 199807
Text Language: French
Summary Language: English
Publisher: Societe Geologique de France, Paris, France
References: 37
Accession Number: 1999-014831
Categories: StratigraphyIsotope geochemistry
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. 1 table, geol. sketch map
Secondary Affiliation: Centre des Faibles Radioactivities, FRA, FranceBureau de Recherches Geologiques et Minieres, FRA, France
Country of Publication: France
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute.
Update Code: 199906
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