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Ferroan Dolomitization by Seawater Interaction with Mafic Igneous Dikes and Carbonate Host Rock at the Latemar Platform, Dolomites, Italy: Numerical Modeling of Spatial, Temporal, and Temperature Data
Joint Authors
Blomme, K.
Fowler, S. J.
Bachaud, P.
Nader, F. H.
Michel, A.
Swennen, R.
Source
Issue
Vol. 2017, Issue 2017 (31 Dec. 2017), pp.1-14, 14 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2017-05-03
Country of Publication
Egypt
No. of Pages
14
Main Subjects
Abstract EN
Numerous publications address the petrogenesis of the partially dolomitized Latemar carbonate platform, Italy.
A common factor is interpretation of geochemical data in terms of heating via regional igneous activity that provided kinetically favorable conditions for replacement dolomitization.
New field, petrographic, XRD, and geochemical data demonstrate a spatial, temporal, and geochemical link between replacement dolomite and local mafic igneous dikes that pervasively intrude the platform.
Dikes are dominated by strongly altered plagioclase and clinopyroxene.
Significantly, where ferroan dolomite is present, it borders dikes.
We hypothesize that seawater interacted with mafic minerals, causing Fe enrichment in the fluid that subsequently participated in dolomitization.
This hypothesis was tested numerically through thermodynamic (MELTS, Arxim-GEM) and reactive flow (Arxim-LMA) simulations.
Results confirm that seawater becomes Fe-enriched during interaction with clinopyroxene (diopside-hedenbergite) and plagioclase (anorthite-albite-orthoclase) solid solutions.
Reaction of modified seawater with limestone causes ferroan and nonferroan replacement dolomitization.
Dolomite quantities are strongly influenced by temperature.
At 40 to 80°C, ferroan dolomite proportions decrease with increasing temperature, indicating that Latemar dolomitization likely occurred at lower temperatures.
This relationship between igneous dikes and dolomitization may have general significance due to the widespread association of carbonates with rifting-related igneous environments.
American Psychological Association (APA)
Blomme, K.& Fowler, S. J.& Bachaud, P.& Nader, F. H.& Michel, A.& Swennen, R.. 2017. Ferroan Dolomitization by Seawater Interaction with Mafic Igneous Dikes and Carbonate Host Rock at the Latemar Platform, Dolomites, Italy: Numerical Modeling of Spatial, Temporal, and Temperature Data. Geofluids،Vol. 2017, no. 2017, pp.1-14.
https://search.emarefa.net/detail/BIM-1155737
Modern Language Association (MLA)
Blomme, K.…[et al.]. Ferroan Dolomitization by Seawater Interaction with Mafic Igneous Dikes and Carbonate Host Rock at the Latemar Platform, Dolomites, Italy: Numerical Modeling of Spatial, Temporal, and Temperature Data. Geofluids No. 2017 (2017), pp.1-14.
https://search.emarefa.net/detail/BIM-1155737
American Medical Association (AMA)
Blomme, K.& Fowler, S. J.& Bachaud, P.& Nader, F. H.& Michel, A.& Swennen, R.. Ferroan Dolomitization by Seawater Interaction with Mafic Igneous Dikes and Carbonate Host Rock at the Latemar Platform, Dolomites, Italy: Numerical Modeling of Spatial, Temporal, and Temperature Data. Geofluids. 2017. Vol. 2017, no. 2017, pp.1-14.
https://search.emarefa.net/detail/BIM-1155737
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1155737