Petrographic and Geochemical Inferences for Genesis of Terra Rossa: A Case Study from the Apulian Karst (Southern Italy)
Terra rossa is a reddish clay soil which is often present on the surface of limestone in regions with a Mediterranean-type climate. Its genesis is a controversial subject in terms of the origin of the parent material, from the residuum of underlying (carbonate/dolomite) bedrock in the absence/presen...
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Online Access: | https://hdl.handle.net/2318/1922170 https://doi.org/10.3390/min13040499 |
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ftunivtorino:oai:iris.unito.it:2318/1922170 2023-10-29T02:35:38+01:00 Petrographic and Geochemical Inferences for Genesis of Terra Rossa: A Case Study from the Apulian Karst (Southern Italy) Micheletti F. Fornelli A. Spalluto L. Parise M. Gallicchio S. Tursi F. Festa V. Micheletti F. Fornelli A. Spalluto L. Parise M. Gallicchio S. Tursi F. Festa V. 2023 https://hdl.handle.net/2318/1922170 https://doi.org/10.3390/min13040499 eng eng info:eu-repo/semantics/altIdentifier/wos/WOS:000977019900001 volume:13 issue:499 firstpage:1 lastpage:18 numberofpages:18 journal:MINERALS https://hdl.handle.net/2318/1922170 doi:10.3390/min13040499 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85156118864 info:eu-repo/semantics/openAccess terra rossa karst limestone residual deposit silicate input southern Italy info:eu-repo/semantics/article 2023 ftunivtorino https://doi.org/10.3390/min13040499 2023-10-03T22:15:01Z Terra rossa is a reddish clay soil which is often present on the surface of limestone in regions with a Mediterranean-type climate. Its genesis is a controversial subject in terms of the origin of the parent material, from the residuum of underlying (carbonate/dolomite) bedrock in the absence/presence of an external silicate contribution (e.g., aeolian dust). Within this context the main goal of the present work was the understanding of the geochemical processes leading to the formation of the terra rossa starting from the carbonate bedrock. We report the results of a multi-method analysis on a terra rossa deposit occupying the bottom of a Quaternary karst depression on Mesozoic limestones exposed in the Murge area (Apulia Foreland, southern Italy). Geological, petrographic, textural, and chemical data were collected on karst products (reddish calcite incrustations and nodules, and fine-grained portion of terra rossa) by a detailed field mapping, optical microscopy, XRF and fusion ICP/MS analyses and by scanning electron microscope. New collected data show that the mineralogical composition of reddish incrustations and nodules is comparable, consisting of fibrous and impure calcite, detrital fragments of quartz, K-feldspar, zircon and authigenic minerals as (Mn, Ba, Ca) phases, (Al, Si, Mn, Fe, Mg, Ba, Ca) minerals, Fe-kaolinite and anatase. The prevailing minerals, instead, in the fine-grained portion of terra rossa are hematite, kaolinite, and goethite. Based on the chemical composition, and especially on REE patterns, a progressive interaction of silicate aqueous solutions (with Al, Si, Fe), containing pelite material, with the calcareous bedrock, as a source of carbonic acid, was the process driving the formation of terra rossa. Obtained results add new elements to the definition of the long-lasting question about the genetic processes responsible for the formation of terra rossa, corroborating their polygenetic origin, as result of limestone alteration in conjunction with the chemical interaction with ... Article in Journal/Newspaper Carbonic acid Università degli studi di Torino: AperTo (Archivio Istituzionale ad Accesso Aperto) Minerals 13 4 499 |
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Università degli studi di Torino: AperTo (Archivio Istituzionale ad Accesso Aperto) |
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language |
English |
topic |
terra rossa karst limestone residual deposit silicate input southern Italy |
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terra rossa karst limestone residual deposit silicate input southern Italy Micheletti F. Fornelli A. Spalluto L. Parise M. Gallicchio S. Tursi F. Festa V. Petrographic and Geochemical Inferences for Genesis of Terra Rossa: A Case Study from the Apulian Karst (Southern Italy) |
topic_facet |
terra rossa karst limestone residual deposit silicate input southern Italy |
description |
Terra rossa is a reddish clay soil which is often present on the surface of limestone in regions with a Mediterranean-type climate. Its genesis is a controversial subject in terms of the origin of the parent material, from the residuum of underlying (carbonate/dolomite) bedrock in the absence/presence of an external silicate contribution (e.g., aeolian dust). Within this context the main goal of the present work was the understanding of the geochemical processes leading to the formation of the terra rossa starting from the carbonate bedrock. We report the results of a multi-method analysis on a terra rossa deposit occupying the bottom of a Quaternary karst depression on Mesozoic limestones exposed in the Murge area (Apulia Foreland, southern Italy). Geological, petrographic, textural, and chemical data were collected on karst products (reddish calcite incrustations and nodules, and fine-grained portion of terra rossa) by a detailed field mapping, optical microscopy, XRF and fusion ICP/MS analyses and by scanning electron microscope. New collected data show that the mineralogical composition of reddish incrustations and nodules is comparable, consisting of fibrous and impure calcite, detrital fragments of quartz, K-feldspar, zircon and authigenic minerals as (Mn, Ba, Ca) phases, (Al, Si, Mn, Fe, Mg, Ba, Ca) minerals, Fe-kaolinite and anatase. The prevailing minerals, instead, in the fine-grained portion of terra rossa are hematite, kaolinite, and goethite. Based on the chemical composition, and especially on REE patterns, a progressive interaction of silicate aqueous solutions (with Al, Si, Fe), containing pelite material, with the calcareous bedrock, as a source of carbonic acid, was the process driving the formation of terra rossa. Obtained results add new elements to the definition of the long-lasting question about the genetic processes responsible for the formation of terra rossa, corroborating their polygenetic origin, as result of limestone alteration in conjunction with the chemical interaction with ... |
author2 |
Micheletti F. Fornelli A. Spalluto L. Parise M. Gallicchio S. Tursi F. Festa V. |
format |
Article in Journal/Newspaper |
author |
Micheletti F. Fornelli A. Spalluto L. Parise M. Gallicchio S. Tursi F. Festa V. |
author_facet |
Micheletti F. Fornelli A. Spalluto L. Parise M. Gallicchio S. Tursi F. Festa V. |
author_sort |
Micheletti F. |
title |
Petrographic and Geochemical Inferences for Genesis of Terra Rossa: A Case Study from the Apulian Karst (Southern Italy) |
title_short |
Petrographic and Geochemical Inferences for Genesis of Terra Rossa: A Case Study from the Apulian Karst (Southern Italy) |
title_full |
Petrographic and Geochemical Inferences for Genesis of Terra Rossa: A Case Study from the Apulian Karst (Southern Italy) |
title_fullStr |
Petrographic and Geochemical Inferences for Genesis of Terra Rossa: A Case Study from the Apulian Karst (Southern Italy) |
title_full_unstemmed |
Petrographic and Geochemical Inferences for Genesis of Terra Rossa: A Case Study from the Apulian Karst (Southern Italy) |
title_sort |
petrographic and geochemical inferences for genesis of terra rossa: a case study from the apulian karst (southern italy) |
publishDate |
2023 |
url |
https://hdl.handle.net/2318/1922170 https://doi.org/10.3390/min13040499 |
genre |
Carbonic acid |
genre_facet |
Carbonic acid |
op_relation |
info:eu-repo/semantics/altIdentifier/wos/WOS:000977019900001 volume:13 issue:499 firstpage:1 lastpage:18 numberofpages:18 journal:MINERALS https://hdl.handle.net/2318/1922170 doi:10.3390/min13040499 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85156118864 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.3390/min13040499 |
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Minerals |
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13 |
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499 |
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1781058979300900864 |