2019
DOI: 10.1155/2019/7213050
|View full text |Cite
|
Sign up to set email alerts
|

Nature and Origin of Mineralizing Fluids in Hyperextensional Systems: The Case of Cretaceous Mg Metasomatism in the Pyrenees

Abstract: During the Albian, the hyperextension of the Pyrenean passive margin led to a hyperthinning of the continental crust and the subsequent subcontinental mantle exhumation. The giant Trimouns talc-chlorite deposit represents the most prominent occurrence of Albian metasomatism in the Pyrenees, with the occurrence of the largest talc deposit worldwide. Consequently, this deposit, which is located on a fault zone and a lithological contact, represents one of the major drains at the scale of the Pyrenees and one of … Show more

Help me understand this report

Search citation statements

Order By: Relevance

Paper Sections

Select...
2
1
1
1

Citation Types

2
17
0

Year Published

2020
2020
2024
2024

Publication Types

Select...
6
1

Relationship

0
7

Authors

Journals

citations
Cited by 18 publications
(19 citation statements)
references
References 78 publications
2
17
0
Order By: Relevance
“…Traces of gas in FI are found in the different localities, mostly N 2 -CO 2 with minor CH 4 (Reynès), CH 4 and N 2 (Jau) and both N 2 , CO 2 and CH 4 are present in Trimouns FIs with various gas ratios. These new data confirm the presence of high salinity fluids in Mg-metasomatic zones such as those found at Trimouns (Parseval, 1992, Boiron et al, 2007, Quesnel et al, 2019. Such brines appear as predominant in fault zones in the eastern part of the Pyrenees.…”
Section: Syn-rift Occurrencessupporting
confidence: 75%
See 3 more Smart Citations
“…Traces of gas in FI are found in the different localities, mostly N 2 -CO 2 with minor CH 4 (Reynès), CH 4 and N 2 (Jau) and both N 2 , CO 2 and CH 4 are present in Trimouns FIs with various gas ratios. These new data confirm the presence of high salinity fluids in Mg-metasomatic zones such as those found at Trimouns (Parseval, 1992, Boiron et al, 2007, Quesnel et al, 2019. Such brines appear as predominant in fault zones in the eastern part of the Pyrenees.…”
Section: Syn-rift Occurrencessupporting
confidence: 75%
“…At Trimouns, several data agree with the features of the primary evaporitic brines, such as the richness in Na-K-(Mg), Cl isotopes values compatible with evaporated seawater, and a low Cl/Br ratio indicative of evaporated seawater having passed halite saturation, at less for a part of the data (Quesnel et al, 2019). The calcium content is relatively high as in most other similar brines and is generally interpreted as Na-Ca exchange result through brine-rock interactions such as albitisation (McCaig et al, 2000, Boiron et al, 2010.…”
Section: Mixing Between Brines and Low Salinity Fluidsmentioning
confidence: 56%
See 2 more Smart Citations
“…To date, the large‐scale dolomitization process is still under debate, with remaining questions about the source of fluids and its Mg content (Whitaker et al ., 2004; Gomez‐Rivas et al ., 2014; Koeshidayatullah et al ., 2020b) on the pathways allowing for long‐term renewed fluid migrations in tectonic context (Machel & Mountjoy, 1986; Whitaker et al ., 2004; Breesch et al ., 2010; Beaudoin et al ., 2014; Gomez‐Rivas et al ., 2014; Chen et al ., 2016; Pinto et al ., 2017; Scribano et al ., 2017; Debure et al ., 2019; Quesnel et al ., 2019), and on the fluid transport limitation of the phenomenon at either outcrop‐scale (Koeshidayatullah et al ., 2020b) or crystal‐scale (Putnis & Putnis, 2007; Merino & Canals, 2011; Kondratiuk et al ., 2015). At the crystal‐scale, two conceptual models compete to account for dolomitization: the growth‐driven pressure‐solution (Merino & Canals, 2011); and the dissolution–precipitation mechanism (Putnis & Putnis, 2007).…”
Section: Introductionmentioning
confidence: 99%