Sediment-hosted geothermal systems: Review and first global mapping
Sediment-Hosted Geothermal Systems (SHGSs) are hybrid geological systems, where volcanic and sedimentary domains interact, leading to mixtures of inorganic and organic gases. Typically characterized by geothermal (thermometamorphic or mantle-derived) CO2 and biotic (microbial or thermogenic) CH4, SH...
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ftoceanrep:oai:oceanrep.geomar.de:54324 2023-05-15T16:59:21+02:00 Sediment-hosted geothermal systems: Review and first global mapping Procesi, M. Ciotoli, G. Mazzini, A. Etiope, G. 2019-05 text https://oceanrep.geomar.de/id/eprint/54324/ https://oceanrep.geomar.de/id/eprint/54324/1/Procesi%20et%20al.pdf https://doi.org/10.1016/j.earscirev.2019.03.020 en eng Elsevier https://oceanrep.geomar.de/id/eprint/54324/1/Procesi%20et%20al.pdf Procesi, M., Ciotoli, G., Mazzini, A. and Etiope, G. (2019) Sediment-hosted geothermal systems: Review and first global mapping. Earth-Science Reviews, 192 . pp. 529-544. DOI 10.1016/j.earscirev.2019.03.020 <https://doi.org/10.1016/j.earscirev.2019.03.020>. doi:10.1016/j.earscirev.2019.03.020 info:eu-repo/semantics/restrictedAccess Article PeerReviewed 2019 ftoceanrep https://doi.org/10.1016/j.earscirev.2019.03.020 2023-04-07T15:59:33Z Sediment-Hosted Geothermal Systems (SHGSs) are hybrid geological systems, where volcanic and sedimentary domains interact, leading to mixtures of inorganic and organic gases. Typically characterized by geothermal (thermometamorphic or mantle-derived) CO2 and biotic (microbial or thermogenic) CH4, SHGSs occur in sedimentary basins crossed by magmatic intrusions or involved in volcanic plumbing systems. These systems can be of considerable interest for petroleum exploration and natural greenhouse-gas emission studies, but systematic studies for their characterization and worldwide distribution are missing. Here, we provide a review of SHGSs identified so far, and propose methodological criteria for their definition and identification, based on integrated geological and gas-geochemical parameters. We find that SHGSs are typically characterized by: (a) fluids dominated by mantle or decarbonation-methamorphic CO2 (>50 vol%); (b) considerable amounts of CH4 and heavier hydrocarbons (at least 1.5 vol%, generally up to 30–40 vol%), produced by microbial or thermogenic degradation of organic matter hosted in sedimentary rocks; (c) tectonically active sedimentary basins (back-arc, rift zones and foredeep), generally hosting petroleum fields and within ~300 km from recent or ancient volcanic centers. This analysis resulted in a global map including a first set of 33 SHGSs located in North America, Central and Eastern Europe, Far East, Eastern Oceania and Northern New Zealand, and a second set of potential SHGS prone areas, occurring also in South America, North Africa, Middle East and Kamchatka. The present SHGS map can evolve on the basis of more detailed geological analysis and new gas-geochemical data. Article in Journal/Newspaper Kamchatka OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) New Zealand Earth-Science Reviews 192 529 544 |
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OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) |
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ftoceanrep |
language |
English |
description |
Sediment-Hosted Geothermal Systems (SHGSs) are hybrid geological systems, where volcanic and sedimentary domains interact, leading to mixtures of inorganic and organic gases. Typically characterized by geothermal (thermometamorphic or mantle-derived) CO2 and biotic (microbial or thermogenic) CH4, SHGSs occur in sedimentary basins crossed by magmatic intrusions or involved in volcanic plumbing systems. These systems can be of considerable interest for petroleum exploration and natural greenhouse-gas emission studies, but systematic studies for their characterization and worldwide distribution are missing. Here, we provide a review of SHGSs identified so far, and propose methodological criteria for their definition and identification, based on integrated geological and gas-geochemical parameters. We find that SHGSs are typically characterized by: (a) fluids dominated by mantle or decarbonation-methamorphic CO2 (>50 vol%); (b) considerable amounts of CH4 and heavier hydrocarbons (at least 1.5 vol%, generally up to 30–40 vol%), produced by microbial or thermogenic degradation of organic matter hosted in sedimentary rocks; (c) tectonically active sedimentary basins (back-arc, rift zones and foredeep), generally hosting petroleum fields and within ~300 km from recent or ancient volcanic centers. This analysis resulted in a global map including a first set of 33 SHGSs located in North America, Central and Eastern Europe, Far East, Eastern Oceania and Northern New Zealand, and a second set of potential SHGS prone areas, occurring also in South America, North Africa, Middle East and Kamchatka. The present SHGS map can evolve on the basis of more detailed geological analysis and new gas-geochemical data. |
format |
Article in Journal/Newspaper |
author |
Procesi, M. Ciotoli, G. Mazzini, A. Etiope, G. |
spellingShingle |
Procesi, M. Ciotoli, G. Mazzini, A. Etiope, G. Sediment-hosted geothermal systems: Review and first global mapping |
author_facet |
Procesi, M. Ciotoli, G. Mazzini, A. Etiope, G. |
author_sort |
Procesi, M. |
title |
Sediment-hosted geothermal systems: Review and first global mapping |
title_short |
Sediment-hosted geothermal systems: Review and first global mapping |
title_full |
Sediment-hosted geothermal systems: Review and first global mapping |
title_fullStr |
Sediment-hosted geothermal systems: Review and first global mapping |
title_full_unstemmed |
Sediment-hosted geothermal systems: Review and first global mapping |
title_sort |
sediment-hosted geothermal systems: review and first global mapping |
publisher |
Elsevier |
publishDate |
2019 |
url |
https://oceanrep.geomar.de/id/eprint/54324/ https://oceanrep.geomar.de/id/eprint/54324/1/Procesi%20et%20al.pdf https://doi.org/10.1016/j.earscirev.2019.03.020 |
geographic |
New Zealand |
geographic_facet |
New Zealand |
genre |
Kamchatka |
genre_facet |
Kamchatka |
op_relation |
https://oceanrep.geomar.de/id/eprint/54324/1/Procesi%20et%20al.pdf Procesi, M., Ciotoli, G., Mazzini, A. and Etiope, G. (2019) Sediment-hosted geothermal systems: Review and first global mapping. Earth-Science Reviews, 192 . pp. 529-544. DOI 10.1016/j.earscirev.2019.03.020 <https://doi.org/10.1016/j.earscirev.2019.03.020>. doi:10.1016/j.earscirev.2019.03.020 |
op_rights |
info:eu-repo/semantics/restrictedAccess |
op_doi |
https://doi.org/10.1016/j.earscirev.2019.03.020 |
container_title |
Earth-Science Reviews |
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192 |
container_start_page |
529 |
op_container_end_page |
544 |
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1766051604573716480 |