Caractérisation sédimentaire de la formation roche mère carbonatée Parnac du Kimméridgien supérieur du Bassin d'Aquitaine (Quercy)

Translated title of the contribution: Sedimentary characterization of the carbonate source rock of Upper Kimmeridgian Parnac Formation of the Aquitaine Basin (Quercy area)

L Bastianini, Bruno Caline, Guilhem Hoareau, Cédric Bonnel, Mathieu Martinez, Carine Lézin, François Baudin, Alexander Brasier, Laurent Guy

Research output: Contribution to journalArticle

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Abstract

The main source rock (SR) of the Aquitaine Basin, the most important oil province in France, corresponds to organic-rich marine limestones of Upper Kimmeridgian age (Lons Formation in the Béarn area and Parnac Formation in the Quercy area). In order to better characterize their depositional environment, in particular the conditions of accumulation and preservation of organic-matter, a sedimentological, micropaleontological and geochemical study of the Crayssac section (Quercy) has been performed. Organic-rich sediments are argillaceous limestones (65 to 99% CaCO3) organized in repetitive beds of up to 1-m thickness. Their total organic matter content reaches up to 15 wt.%, and in this SR kerogen is type of II and immature. Microfauna content, the lack of barrier facies and the control of the wave action base over the depositional environments reflect deposition in an open marine type homoclinal ramp. Strong similarities with Kimmeridgian organic-rich limestones of the Middle East (Hanifa Formation) suggest that the Parnac Formation could act as an analogue of this prolific SR.
Original languageFrench
Article number32
Pages (from-to)1-16
Number of pages16
JournalBulletin de la Socie´te´ Ge´ologique de France
Volume188
Issue number5
Early online date15 Nov 2017
DOIs
Publication statusPublished - 2017

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Kimmeridgian
carbonate rock
source rock
limestone
depositional environment
basin
organic matter
wave action
kerogen
oil
sediment

Keywords

  • Aquitaine Basin
  • source rock
  • upper Kimmeridgian
  • Parnac Formation
  • carbonates
  • organic matter
  • Bassin d’Aquitaine
  • roche mère
  • Kimméridgien supérieur
  • Formation de Parnac
  • matière organique

Cite this

Caractérisation sédimentaire de la formation roche mère carbonatée Parnac du Kimméridgien supérieur du Bassin d'Aquitaine (Quercy). / Bastianini, L; Caline, Bruno; Hoareau, Guilhem; Bonnel, Cédric; Martinez, Mathieu; Lézin, Carine; Baudin, François; Brasier, Alexander ; Guy, Laurent.

In: Bulletin de la Socie´te´ Ge´ologique de France, Vol. 188, No. 5, 32, 2017, p. 1-16.

Research output: Contribution to journalArticle

Bastianini, L ; Caline, Bruno ; Hoareau, Guilhem ; Bonnel, Cédric ; Martinez, Mathieu ; Lézin, Carine ; Baudin, François ; Brasier, Alexander ; Guy, Laurent. / Caractérisation sédimentaire de la formation roche mère carbonatée Parnac du Kimméridgien supérieur du Bassin d'Aquitaine (Quercy). In: Bulletin de la Socie´te´ Ge´ologique de France. 2017 ; Vol. 188, No. 5. pp. 1-16.
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abstract = "The main source rock (SR) of the Aquitaine Basin, the most important oil province in France, corresponds to organic-rich marine limestones of Upper Kimmeridgian age (Lons Formation in the B{\'e}arn area and Parnac Formation in the Quercy area). In order to better characterize their depositional environment, in particular the conditions of accumulation and preservation of organic-matter, a sedimentological, micropaleontological and geochemical study of the Crayssac section (Quercy) has been performed. Organic-rich sediments are argillaceous limestones (65 to 99{\%} CaCO3) organized in repetitive beds of up to 1-m thickness. Their total organic matter content reaches up to 15 wt.{\%}, and in this SR kerogen is type of II and immature. Microfauna content, the lack of barrier facies and the control of the wave action base over the depositional environments reflect deposition in an open marine type homoclinal ramp. Strong similarities with Kimmeridgian organic-rich limestones of the Middle East (Hanifa Formation) suggest that the Parnac Formation could act as an analogue of this prolific SR.",
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author = "L Bastianini and Bruno Caline and Guilhem Hoareau and C{\'e}dric Bonnel and Mathieu Martinez and Carine L{\'e}zin and Fran{\cc}ois Baudin and Alexander Brasier and Laurent Guy",
note = "The authors would like to thank Bertrand Fasentieux for the production of thin sections. We would like to express our gratitude to Dr. Alexander Brasier for his contribution to this manuscript. Olivier Ridet and Maryline Castello are acknowledged for their participation to field campaigns. We also thank Frank Haeseler, Claire Fialips and Pierre Hantzpergue for fruitful discussions. This manuscript greatly benefited from the remarks of two anonymous reviewers.",
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AU - Bastianini, L

AU - Caline, Bruno

AU - Hoareau, Guilhem

AU - Bonnel, Cédric

AU - Martinez, Mathieu

AU - Lézin, Carine

AU - Baudin, François

AU - Brasier, Alexander

AU - Guy, Laurent

N1 - The authors would like to thank Bertrand Fasentieux for the production of thin sections. We would like to express our gratitude to Dr. Alexander Brasier for his contribution to this manuscript. Olivier Ridet and Maryline Castello are acknowledged for their participation to field campaigns. We also thank Frank Haeseler, Claire Fialips and Pierre Hantzpergue for fruitful discussions. This manuscript greatly benefited from the remarks of two anonymous reviewers.

PY - 2017

Y1 - 2017

N2 - The main source rock (SR) of the Aquitaine Basin, the most important oil province in France, corresponds to organic-rich marine limestones of Upper Kimmeridgian age (Lons Formation in the Béarn area and Parnac Formation in the Quercy area). In order to better characterize their depositional environment, in particular the conditions of accumulation and preservation of organic-matter, a sedimentological, micropaleontological and geochemical study of the Crayssac section (Quercy) has been performed. Organic-rich sediments are argillaceous limestones (65 to 99% CaCO3) organized in repetitive beds of up to 1-m thickness. Their total organic matter content reaches up to 15 wt.%, and in this SR kerogen is type of II and immature. Microfauna content, the lack of barrier facies and the control of the wave action base over the depositional environments reflect deposition in an open marine type homoclinal ramp. Strong similarities with Kimmeridgian organic-rich limestones of the Middle East (Hanifa Formation) suggest that the Parnac Formation could act as an analogue of this prolific SR.

AB - The main source rock (SR) of the Aquitaine Basin, the most important oil province in France, corresponds to organic-rich marine limestones of Upper Kimmeridgian age (Lons Formation in the Béarn area and Parnac Formation in the Quercy area). In order to better characterize their depositional environment, in particular the conditions of accumulation and preservation of organic-matter, a sedimentological, micropaleontological and geochemical study of the Crayssac section (Quercy) has been performed. Organic-rich sediments are argillaceous limestones (65 to 99% CaCO3) organized in repetitive beds of up to 1-m thickness. Their total organic matter content reaches up to 15 wt.%, and in this SR kerogen is type of II and immature. Microfauna content, the lack of barrier facies and the control of the wave action base over the depositional environments reflect deposition in an open marine type homoclinal ramp. Strong similarities with Kimmeridgian organic-rich limestones of the Middle East (Hanifa Formation) suggest that the Parnac Formation could act as an analogue of this prolific SR.

KW - Aquitaine Basin

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KW - upper Kimmeridgian

KW - Parnac Formation

KW - carbonates

KW - organic matter

KW - Bassin d’Aquitaine

KW - roche mère

KW - Kimméridgien supérieur

KW - Formation de Parnac

KW - matière organique

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SP - 1

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JO - Bulletin de la Socie´te´ Ge´ologique de France

JF - Bulletin de la Socie´te´ Ge´ologique de France

SN - 0037-9409

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