Depositional environments and iron ooid formation in condensed sections (Callovian–Oxfordian, south‐eastern Paris basin, France)
Identifieur interne : 000922 ( Main/Exploration ); précédent : 000921; suivant : 000923Depositional environments and iron ooid formation in condensed sections (Callovian–Oxfordian, south‐eastern Paris basin, France)
Auteurs : P. Y. Collin [France] ; J. P. Loreau [France] ; P. Courville [France]Source :
- Sedimentology [ 0037-0746 ] ; 2005-10.
English descriptors
Abstract
Carbonate platforms across Western Europe were superseded at the Middle–Upper Jurassic (Callovian–Oxfordian) boundary either by alternating marl–limestone and widespread marl deposits or by condensed sections containing iron ooids. The characteristics of marine condensed sections in the south‐eastern part of the Paris Basin (France) and their distribution pattern are examined here, and a model of iron ooid formation is developed. Iron ooids are found from the shoreface to the offshore zone. They are most abundant in the median‐to‐distal offshore transition zone, where they originally formed. They also occur commonly, albeit often as reworked grains, in the proximal offshore zone, to which they were transported. The contemporaneous, thick, predominantly marl sections that occur laterally are devoid of iron ooids and were deposited in deeper settings (distal offshore zone). The iron ooids are composed of goethite. Typically, they have a nucleus made up of a clump of goethite crystals and a laminated cortex. Three distinctive nanostructures are identified in the cortex laminae: (i) a nanograined crystalline structure typical of primary goethite; (ii) a secondary nanoflaked structure thought to have formed mechanically by reorientation of the goethite crystals; and (iii) a coalesced structure acquired by subsequent diagenetic recrystallization. The iron ooids formed successively (i) by lamina growth when goethite precipitated in the surface layer of the sediment (nanograined structure) and (ii) by interruption of growth when the ooids were remobilized by hydrodynamic agents, as reflected by the flaked nanostructure; (iii) these two nanostructures were sometimes transformed into a coalesced structure by recrystallization when ooids were buried.
Url:
DOI: 10.1111/j.1365-3091.2005.00728.x
Affiliations:
- France
- Bourgogne, Bourgogne-Franche-Comté, Région Bretagne
- Dijon, Rennes
- Université de Bourgogne, Université de Rennes 1
Links toward previous steps (curation, corpus...)
- to stream Istex, to step Corpus: 001368
- to stream Istex, to step Curation: 000E63
- to stream Istex, to step Checkpoint: 000345
- to stream Main, to step Merge: 000933
- to stream Main, to step Curation: 000922
Le document en format XML
<record><TEI wicri:istexFullTextTei="biblStruct"><teiHeader><fileDesc><titleStmt><title xml:lang="en">Depositional environments and iron ooid formation in condensed sections (Callovian–Oxfordian, south‐eastern Paris basin, France)</title><author><name sortKey="Collin, P Y" sort="Collin, P Y" uniqKey="Collin P" first="P. Y." last="Collin">P. Y. Collin</name></author><author><name sortKey="Loreau, J P" sort="Loreau, J P" uniqKey="Loreau J" first="J. P." last="Loreau">J. P. Loreau</name></author><author><name sortKey="Courville, P" sort="Courville, P" uniqKey="Courville P" first="P." last="Courville">P. Courville</name></author></titleStmt><publicationStmt><idno type="wicri:source">ISTEX</idno><idno type="RBID">ISTEX:45E3C110729991CD61868CA2C6A7C231BAB7F805</idno><date when="2005" year="2005">2005</date><idno type="doi">10.1111/j.1365-3091.2005.00728.x</idno><idno type="url">https://api.istex.fr/document/45E3C110729991CD61868CA2C6A7C231BAB7F805/fulltext/pdf</idno><idno type="wicri:Area/Istex/Corpus">001368</idno><idno type="wicri:explorRef" wicri:stream="Istex" wicri:step="Corpus" wicri:corpus="ISTEX">001368</idno><idno type="wicri:Area/Istex/Curation">000E63</idno><idno type="wicri:Area/Istex/Checkpoint">000345</idno><idno type="wicri:explorRef" wicri:stream="Istex" wicri:step="Checkpoint">000345</idno><idno type="wicri:doubleKey">0037-0746:2005:Collin P:depositional:environments:and</idno><idno type="wicri:Area/Main/Merge">000933</idno><idno type="wicri:Area/Main/Curation">000922</idno><idno type="wicri:Area/Main/Exploration">000922</idno></publicationStmt><sourceDesc><biblStruct><analytic><title level="a" type="main" xml:lang="en">Depositional environments and iron ooid formation in condensed sections (Callovian–Oxfordian, south‐eastern Paris basin, France)</title><author><name sortKey="Collin, P Y" sort="Collin, P Y" uniqKey="Collin P" first="P. Y." last="Collin">P. Y. Collin</name><affiliation wicri:level="4"><country wicri:rule="url">France</country><wicri:regionArea>Université de Bourgogne, Centre des Sciences de la Terre, UMR‐CNRS 5561 ‘Biogéosciences’, 6, Bd Gabriel, F‐21000 Dijon</wicri:regionArea><placeName><region type="region" nuts="2">Bourgogne-Franche-Comté</region><region type="old region" nuts="2">Bourgogne</region><settlement type="city">Dijon</settlement></placeName><orgName type="university">Université de Bourgogne</orgName></affiliation></author><author><name sortKey="Loreau, J P" sort="Loreau, J P" uniqKey="Loreau J" first="J. P." last="Loreau">J. P. Loreau</name><affiliation wicri:level="4"><country wicri:rule="url">France</country><wicri:regionArea>Université de Bourgogne, Centre des Sciences de la Terre, UMR‐CNRS 5561 ‘Biogéosciences’, 6, Bd Gabriel, F‐21000 Dijon</wicri:regionArea><placeName><region type="region" nuts="2">Bourgogne-Franche-Comté</region><region type="old region" nuts="2">Bourgogne</region><settlement type="city">Dijon</settlement></placeName><orgName type="university">Université de Bourgogne</orgName></affiliation></author><author><name sortKey="Courville, P" sort="Courville, P" uniqKey="Courville P" first="P." last="Courville">P. Courville</name><affiliation wicri:level="4"><country xml:lang="fr">France</country><wicri:regionArea>Université de Rennes 1, UMR‐CNRS 4661 ‘Géosciences’, Campus Beaulieu, 263, av. du Gen. Leclerc, F‐35000 Rennes</wicri:regionArea><placeName><region type="region" nuts="2">Région Bretagne</region><settlement type="city">Rennes</settlement></placeName><orgName type="university">Université de Rennes 1</orgName></affiliation></author></analytic><monogr></monogr><series><title level="j">Sedimentology</title><idno type="ISSN">0037-0746</idno><idno type="eISSN">1365-3091</idno><imprint><publisher>Blackwell Science Ltd</publisher><pubPlace>Oxford, UK</pubPlace><date type="published" when="2005-10">2005-10</date><biblScope unit="volume">52</biblScope><biblScope unit="issue">5</biblScope><biblScope unit="page" from="969">969</biblScope><biblScope unit="page" to="985">985</biblScope></imprint><idno type="ISSN">0037-0746</idno></series><idno type="istex">45E3C110729991CD61868CA2C6A7C231BAB7F805</idno><idno type="DOI">10.1111/j.1365-3091.2005.00728.x</idno><idno type="ArticleID">SED728</idno></biblStruct></sourceDesc><seriesStmt><idno type="ISSN">0037-0746</idno></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Callovian</term><term>Oxfordian</term><term>condensed sections</term><term>depositional environments</term><term>iron ooids</term></keywords></textClass><langUsage><language ident="en">en</language></langUsage></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">Carbonate platforms across Western Europe were superseded at the Middle–Upper Jurassic (Callovian–Oxfordian) boundary either by alternating marl–limestone and widespread marl deposits or by condensed sections containing iron ooids. The characteristics of marine condensed sections in the south‐eastern part of the Paris Basin (France) and their distribution pattern are examined here, and a model of iron ooid formation is developed. Iron ooids are found from the shoreface to the offshore zone. They are most abundant in the median‐to‐distal offshore transition zone, where they originally formed. They also occur commonly, albeit often as reworked grains, in the proximal offshore zone, to which they were transported. The contemporaneous, thick, predominantly marl sections that occur laterally are devoid of iron ooids and were deposited in deeper settings (distal offshore zone). The iron ooids are composed of goethite. Typically, they have a nucleus made up of a clump of goethite crystals and a laminated cortex. Three distinctive nanostructures are identified in the cortex laminae: (i) a nanograined crystalline structure typical of primary goethite; (ii) a secondary nanoflaked structure thought to have formed mechanically by reorientation of the goethite crystals; and (iii) a coalesced structure acquired by subsequent diagenetic recrystallization. The iron ooids formed successively (i) by lamina growth when goethite precipitated in the surface layer of the sediment (nanograined structure) and (ii) by interruption of growth when the ooids were remobilized by hydrodynamic agents, as reflected by the flaked nanostructure; (iii) these two nanostructures were sometimes transformed into a coalesced structure by recrystallization when ooids were buried.</div></front></TEI><affiliations><list><country><li>France</li></country><region><li>Bourgogne</li><li>Bourgogne-Franche-Comté</li><li>Région Bretagne</li></region><settlement><li>Dijon</li><li>Rennes</li></settlement><orgName><li>Université de Bourgogne</li><li>Université de Rennes 1</li></orgName></list><tree><country name="France"><region name="Bourgogne-Franche-Comté"><name sortKey="Collin, P Y" sort="Collin, P Y" uniqKey="Collin P" first="P. Y." last="Collin">P. Y. Collin</name></region><name sortKey="Courville, P" sort="Courville, P" uniqKey="Courville P" first="P." last="Courville">P. Courville</name><name sortKey="Loreau, J P" sort="Loreau, J P" uniqKey="Loreau J" first="J. P." last="Loreau">J. P. Loreau</name></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
EXPLOR_STEP=$WICRI_ROOT/Wicri/Terre/explor/CobaltMaghrebV1/Data/Main/Exploration
HfdSelect -h $EXPLOR_STEP/biblio.hfd -nk 000922 | SxmlIndent | more
Ou
HfdSelect -h $EXPLOR_AREA/Data/Main/Exploration/biblio.hfd -nk 000922 | SxmlIndent | more
Pour mettre un lien sur cette page dans le réseau Wicri
{{Explor lien
|wiki= Wicri/Terre
|area= CobaltMaghrebV1
|flux= Main
|étape= Exploration
|type= RBID
|clé= ISTEX:45E3C110729991CD61868CA2C6A7C231BAB7F805
|texte= Depositional environments and iron ooid formation in condensed sections (Callovian–Oxfordian, south‐eastern Paris basin, France)
}}
| This area was generated with Dilib version V0.6.32. |  |