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 -