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Evolution of diagenetic conditions and burial history in Buntsandstein Gp. fractured sandstones (Upper Rhine Graben) from in-situ δ¹⁸O of quartz and ⁴⁰Ar/³⁹Ar geochronology of K-feldspar overgrowths

Bossennec, Claire ; Géraud, Yves ; Böcker, Johannes ; Klug, Bernd ; Mattioni, Luca ; Sizun, Jean-Pierre ; Sudo, Masafumi ; Moretti, Isabelle (2024)
Evolution of diagenetic conditions and burial history in Buntsandstein Gp. fractured sandstones (Upper Rhine Graben) from in-situ δ¹⁸O of quartz and ⁴⁰Ar/³⁹Ar geochronology of K-feldspar overgrowths.
In: International Journal of Earth Sciences, 2021, 110 (8)
doi: 10.26083/tuprints-00023445
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Item Type: Article
Type of entry: Secondary publication
Title: Evolution of diagenetic conditions and burial history in Buntsandstein Gp. fractured sandstones (Upper Rhine Graben) from in-situ δ¹⁸O of quartz and ⁴⁰Ar/³⁹Ar geochronology of K-feldspar overgrowths
Language: English
Date: 18 March 2024
Place of Publication: Darmstadt
Year of primary publication: November 2021
Place of primary publication: Berlin ; Heidelberg
Publisher: Springer
Journal or Publication Title: International Journal of Earth Sciences
Volume of the journal: 110
Issue Number: 8
DOI: 10.26083/tuprints-00023445
Corresponding Links:
Origin: Secondary publication DeepGreen
Abstract:

In-situ δ¹⁸O measured in the quartz overgrowths help identify temperature and fluid origin variations responsible for cementation of the pore network (matrix and fracture) in the Buntsandstein Gp. sandstone reservoirs within the Upper Rhine Graben. The overgrowths record two types of the evolution of δ¹⁸O: 1) a monotonous decrease of the δ¹⁸Oovergrowth interpreted as linked to an increasing burial temperature and 2) random fluctuations, interpreted as pointing out the injection of allochthonous fluids in faulted areas, on the cementation processes of the pore network (both intergranular and fracture planes). Fluids causing the quartz cementation are either autochthonous buffered in ¹⁸O from clay illitisation; or allochthonous fluids of meteoric origin with δ¹⁸O below − 5%. These allochthonous fluids are in thermal disequilibrium with the host sandstone. The measured signal of δ¹⁸Oovergrowth measured from samples and calculated curves testing hypothetic δ¹⁸Ofluid are compared to T–t evolution during burial. This modelling proposes the initiation of quartz cementation during the Jurassic and is validated by the in-situ ⁴⁰Ar/³⁹Ar dating results obtained on the feldspar overgrowths predating quartz overgrowths. A similar diagenetic history is recorded on the graben shoulders and in the buried parts of the basin. Here, the beginning of the pore network cementation predates the structuration in blocks of the basin before the Cenozoic graben opening.

Uncontrolled Keywords: Quartz cementation, Feldspar overgrowths, In situ δ¹⁸O microanalysis, Burial modelling, Buntsandstein Gp., Upper Rhine Graben
Status: Publisher's Version
URN: urn:nbn:de:tuda-tuprints-234455
Classification DDC: 500 Science and mathematics > 550 Earth sciences and geology
Divisions: 11 Department of Materials and Earth Sciences > Earth Science > Geothermal Science and Technology
Date Deposited: 18 Mar 2024 13:47
Last Modified: 30 Apr 2024 07:15
SWORD Depositor: Deep Green
URI: https://tuprints.ulb.tu-darmstadt.de/id/eprint/23445
PPN: 517335557
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