Details
| Original language | English |
|---|---|
| Pages (from-to) | 2-8 |
| Number of pages | 7 |
| Journal | Rendiconti Online Societa Geologica Italiana |
| Volume | 59 |
| Publication status | Published - Mar 2023 |
Abstract
A Neogene cold seep carbonate body crops out in the Crotone Basin and is characterized by a Conduit facies, made of authigenic carbonates filling the gas/fluid escaping pipes and a Pavement facies made of early-cemented bioclastic and siliciclastic sediments colonized by a chemo-symbiotic fauna dominated by Lucinid bivalves. The conduit facies is composed of alternated mm-thick dark micritic and clear sparitic lamine rimming and inward accreting open fissures. Micrite exhibits microbial peloidal to dendrolitic fabrics, while sparry laminae shows prismatic-pyramidal to anhedral-subhedral crystals. The pavement facies is made of microbial boundstones, bioturbated mudstone/wackestones and packstone/grainstones passing into mixed arenites, all interbedded with syn-sedimentary breccias due to local overpressure conditions because of gas/fluid injections. Planktonic foraminifera are widespread and suggest a deep-water setting. Stable Isotopes analysis in all the facies shows 13C depletion (δ13C values between -6.8 and -38‰) and 18O enrichment (δ18O values between -0.04 to 3.4‰) reflecting destabilization of gas hydrates made of methane/crude oil mix.
Keywords
- chemo-symbiotic fauna, cold seep, conduit, gas hydrate, Lucinids, overpressure, pavement
ASJC Scopus subject areas
- Earth and Planetary Sciences(all)
- Geology
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In: Rendiconti Online Societa Geologica Italiana, Vol. 59, 03.2023, p. 2-8.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Neogene cold seep carbonates in the Crotone Basin (South Italy)
AU - Borrelli, Mario
AU - Umbro, Bruno Francesco
AU - Heimhofer, Ulrich
AU - Santagati, Pierluigi
AU - Le Pera, Emilia
AU - Perri, Edoardo
N1 - Funding Information: We gratefully acknowledge the associate editor Luigi Spalluto and the critical and constructive comments of Amalia Spina and an anonymous reviewer which greatly improved the work. We also thanks SGI and Geosed for the commitment in the organization the ROL special volume. Financial support for this research derived from MIUR (ex 60%) funds (resp. E. Perri) and from PON React EU “Ricerca e Innovazione” 2014–2020 funds (CUP: H25F21001220006).
PY - 2023/3
Y1 - 2023/3
N2 - A Neogene cold seep carbonate body crops out in the Crotone Basin and is characterized by a Conduit facies, made of authigenic carbonates filling the gas/fluid escaping pipes and a Pavement facies made of early-cemented bioclastic and siliciclastic sediments colonized by a chemo-symbiotic fauna dominated by Lucinid bivalves. The conduit facies is composed of alternated mm-thick dark micritic and clear sparitic lamine rimming and inward accreting open fissures. Micrite exhibits microbial peloidal to dendrolitic fabrics, while sparry laminae shows prismatic-pyramidal to anhedral-subhedral crystals. The pavement facies is made of microbial boundstones, bioturbated mudstone/wackestones and packstone/grainstones passing into mixed arenites, all interbedded with syn-sedimentary breccias due to local overpressure conditions because of gas/fluid injections. Planktonic foraminifera are widespread and suggest a deep-water setting. Stable Isotopes analysis in all the facies shows 13C depletion (δ13C values between -6.8 and -38‰) and 18O enrichment (δ18O values between -0.04 to 3.4‰) reflecting destabilization of gas hydrates made of methane/crude oil mix.
AB - A Neogene cold seep carbonate body crops out in the Crotone Basin and is characterized by a Conduit facies, made of authigenic carbonates filling the gas/fluid escaping pipes and a Pavement facies made of early-cemented bioclastic and siliciclastic sediments colonized by a chemo-symbiotic fauna dominated by Lucinid bivalves. The conduit facies is composed of alternated mm-thick dark micritic and clear sparitic lamine rimming and inward accreting open fissures. Micrite exhibits microbial peloidal to dendrolitic fabrics, while sparry laminae shows prismatic-pyramidal to anhedral-subhedral crystals. The pavement facies is made of microbial boundstones, bioturbated mudstone/wackestones and packstone/grainstones passing into mixed arenites, all interbedded with syn-sedimentary breccias due to local overpressure conditions because of gas/fluid injections. Planktonic foraminifera are widespread and suggest a deep-water setting. Stable Isotopes analysis in all the facies shows 13C depletion (δ13C values between -6.8 and -38‰) and 18O enrichment (δ18O values between -0.04 to 3.4‰) reflecting destabilization of gas hydrates made of methane/crude oil mix.
KW - chemo-symbiotic fauna
KW - cold seep
KW - conduit
KW - gas hydrate
KW - Lucinids
KW - overpressure
KW - pavement
UR - http://www.scopus.com/inward/record.url?scp=85153721082&partnerID=8YFLogxK
U2 - 10.3301/ROL.2023.01
DO - 10.3301/ROL.2023.01
M3 - Article
AN - SCOPUS:85153721082
VL - 59
SP - 2
EP - 8
JO - Rendiconti Online Societa Geologica Italiana
JF - Rendiconti Online Societa Geologica Italiana
SN - 2035-8008
ER -