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Fluid pressure variations in relation to multistage deformation and uplift; a fluid inclusion study of Au quartz veins

Michel Cathelineau, Marie Christine Boiron, Samira Essarraj, Jean Dubessy, Marc Lespinasse and Bernard Poty
Fluid pressure variations in relation to multistage deformation and uplift; a fluid inclusion study of Au quartz veins
European Journal of Mineralogy (February 1993) 5 (1): 107-121

Abstract

Using a detailed characterization of quartz microdomains and related fluid inclusions, and the determination of composition- molar volumes for each stage of fluid migration, a reconstruction of the changes in fluid P throughout crack healing or filling has been carried out for quartz veins in the Montagne Noire, French Massif Central. The estimated conditions of an early microfissuring-healing event affecting milky quartz are: minimal P (homogenization P, P (sub h) ) 260-450 MPa, maximal and minimal trapping P assuming a T range of 350-400 degrees C, 400-450 and 260-290 MPa, respectively, at Malabau, and 250 and 150 MPa (at 300- 350 degrees C) at Cabrespine; maximal depth in the 10-19 km range depending on the hypotheses. This stage follows arsenopyrite deposition but precedes later microfissuring associated with a Au- Bi-Cu stage which occurred under much lower P-T conditions.


ISSN: 0935-1221
Serial Title: European Journal of Mineralogy
Serial Volume: 5
Serial Issue: 1
Title: Fluid pressure variations in relation to multistage deformation and uplift; a fluid inclusion study of Au quartz veins
Affiliation: CNRS/CREGU, Centre de Recherches sur la Geologie des Matieres Premieres Minerales et Energetiques, Nancy Cedex, France
Pages: 107-121
Published: 199302
Text Language: English
Publisher: Schweizerbart'sche Verlagsbuchhandlung (Naegele u. Obermiller), Stuttgart, Federal Republic of Germany
References: 51
Accession Number: 1993-003540
Categories: Economic geology, geology of ore depositsIgneous and metamorphic petrology
Document Type: Serial
Bibliographic Level: Analytic
Annotation: Report of meeting, ECROFI, held in Florence, Italy, April 10-12, 1991
Illustration Description: illus. incl. 2 tables, geol. sketch maps
Country of Publication: Germany
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute. Reference includes data from Mineralogical Abstracts, United KingdomTwickenhamUKUnited Kingdom
Update Code: 1993
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