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Stable isotope geochemistry of carbonates from the Apuane Alps mining district, northern Tuscany, Italy

Gianni Cortecci, Marco Benvenuti, Pierfranco Lattanzi and Giuseppe Tanelli
Stable isotope geochemistry of carbonates from the Apuane Alps mining district, northern Tuscany, Italy
European Journal of Mineralogy (June 1992) 4 (3): 509-520

Abstract

Depending on their location in the geological framework, carbonate rocks of this area interacted with metamorphic fluids to a quite different extent, their original delta (super 18) O values being either lowered or preserved. The delta (super 18) O variations are particularly pronounced for the rocks at the contact with schists or orebodies. The water in the fluids was probably driven out of the schists (estimated delta (super 18) O +11.6 +- 1.0 per mille for such water). Vein dolomite from fissure fillings in the dolostones is a metamorphic product and is depleted in both (super 13) C and (super 18) O relative to host dolomite. At Buca della Vena, T of 310 +- 40 degrees C and delta (super 18) O of +15 +- 2 per mille are estimated for vein-forming solutions. According to their delta (super 13) C values, gangue calcites from the stratiform ore deposits at Pollone and Monte Arsiccio should be sedimentary-diagenetic products, essentially produced from organic CO (sub 2) generated by sulphate-reducing bacteria. Their delta (super 18) O values may be due to recrystallization from late diagenetic fluids or alternatively from metamorphic fluids.


ISSN: 0935-1221
Serial Title: European Journal of Mineralogy
Serial Volume: 4
Serial Issue: 3
Title: Stable isotope geochemistry of carbonates from the Apuane Alps mining district, northern Tuscany, Italy
Affiliation: Dipartimento di Scienze della Terra dell'Universita, Pisa, Italy
Pages: 509-520
Published: 199206
Text Language: English
Publisher: Schweizerbart'sche Verlagsbuchhandlung (Naegele u. Obermiller), Stuttgart, Federal Republic of Germany
References: 42
Accession Number: 1995-056311
Categories: Economic geology, geology of ore depositsIsotope geochemistry
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. 1 table, geol. sketch map
Country of Publication: Germany
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute. Reference includes data from Mineralogical Abstracts, United KingdomTwickenhamUKUnited Kingdom
Update Code: 199520
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