Shallow-water hydrocarbon seepages in the Pleistocene Argille Azzurre Formation

the chimneys field of Enza river, Northern Apennines, Italy

Rossella Capozzi, Enrico Dinelli, Alessandra Negri, Paolo Montagna, Davide Oppo, Vincenzo Picotti, S. Scarponi, Marco Taviani

Research output: Contribution to conferenceAbstract

Abstract

The geologically young Northern Apennines contain various traces of hydrocarbon seepages, which are linked to fluid migration triggered by the tectonic evolution of the chain and the foredeep. The most known examples, related to comparatively deep water conditions (> 300 m) are clustered in the late Miocene and early-middle Pliocene successions of the region, while their occurrence in shallow water (shelf) settings is very rarely reported. A case in point is represented by the palisade chimneys field recently exhumed along the Enza river banks in the Northern Apennines (Reggio province). Here, a number of modally vertical, metric-high columnar chimneys ranging in diameter from 10 to 35 cm, affect the Argille Azzurre Fm, biostratigraphically dated at the Early Pleistocene (nannoplancton zone MNN19). Such columnar concretions are clearly formed by the moderate cementation of the pelitic sediments. Macropaleontological content (mainly bivalves) documents that this unit was deposited in an open marine muddy shelfal setting in a bathymetry range of about 50-70 m. Within the Enza river Argille Azzurre succession some biogenic gas leakages still occur. Preliminary studies suggest that the methane migration can be related to the geologic setting of the foothills in this area, which shows a gentle compressive deformation. On the contrary, numerous hydrocarbon seepages along the northern Apennines foothills are characterized by thermogenic methane generated at depth and presently trapped within Tertiary reservoirs. This suggests to take into account the different geologic context as the main control on gas generation and migration. The on-going research is focused upon the petrographic, geochemical and biomaker characteristics of these chimneys to unravel the typology of fluids involved in their formation, their concretioning modality and the fluid expulsion history.
Original languageEnglish
Pages23
Number of pages1
Publication statusPublished - 2012
EventGas in MArine Sediments - Nice, France
Duration: 4 Sep 20127 Sep 2012
Conference number: 11

Conference

ConferenceGas in MArine Sediments
Abbreviated titleGIMS
CountryFrance
CityNice
Period4/09/127/09/12

Fingerprint

seepage
shallow water
Pleistocene
hydrocarbon
methane
river
fluid expulsion
river bank
fluid
concretion
forearc basin
cementation
typology
gas
tectonic evolution
bathymetry
leakage
bivalve
Pliocene
deep water

Cite this

Capozzi, R., Dinelli, E., Negri, A., Montagna, P., Oppo, D., Picotti, V., ... Taviani, M. (2012). Shallow-water hydrocarbon seepages in the Pleistocene Argille Azzurre Formation: the chimneys field of Enza river, Northern Apennines, Italy. 23. Abstract from Gas in MArine Sediments, Nice, France.

Shallow-water hydrocarbon seepages in the Pleistocene Argille Azzurre Formation : the chimneys field of Enza river, Northern Apennines, Italy. / Capozzi, Rossella; Dinelli, Enrico; Negri, Alessandra; Montagna, Paolo; Oppo, Davide; Picotti, Vincenzo; Scarponi, S.; Taviani, Marco.

2012. 23 Abstract from Gas in MArine Sediments, Nice, France.

Research output: Contribution to conferenceAbstract

Capozzi, R, Dinelli, E, Negri, A, Montagna, P, Oppo, D, Picotti, V, Scarponi, S & Taviani, M 2012, 'Shallow-water hydrocarbon seepages in the Pleistocene Argille Azzurre Formation: the chimneys field of Enza river, Northern Apennines, Italy' Gas in MArine Sediments, Nice, France, 4/09/12 - 7/09/12, pp. 23.
Capozzi R, Dinelli E, Negri A, Montagna P, Oppo D, Picotti V et al. Shallow-water hydrocarbon seepages in the Pleistocene Argille Azzurre Formation: the chimneys field of Enza river, Northern Apennines, Italy. 2012. Abstract from Gas in MArine Sediments, Nice, France.
Capozzi, Rossella ; Dinelli, Enrico ; Negri, Alessandra ; Montagna, Paolo ; Oppo, Davide ; Picotti, Vincenzo ; Scarponi, S. ; Taviani, Marco. / Shallow-water hydrocarbon seepages in the Pleistocene Argille Azzurre Formation : the chimneys field of Enza river, Northern Apennines, Italy. Abstract from Gas in MArine Sediments, Nice, France.1 p.
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abstract = "The geologically young Northern Apennines contain various traces of hydrocarbon seepages, which are linked to fluid migration triggered by the tectonic evolution of the chain and the foredeep. The most known examples, related to comparatively deep water conditions (> 300 m) are clustered in the late Miocene and early-middle Pliocene successions of the region, while their occurrence in shallow water (shelf) settings is very rarely reported. A case in point is represented by the palisade chimneys field recently exhumed along the Enza river banks in the Northern Apennines (Reggio province). Here, a number of modally vertical, metric-high columnar chimneys ranging in diameter from 10 to 35 cm, affect the Argille Azzurre Fm, biostratigraphically dated at the Early Pleistocene (nannoplancton zone MNN19). Such columnar concretions are clearly formed by the moderate cementation of the pelitic sediments. Macropaleontological content (mainly bivalves) documents that this unit was deposited in an open marine muddy shelfal setting in a bathymetry range of about 50-70 m. Within the Enza river Argille Azzurre succession some biogenic gas leakages still occur. Preliminary studies suggest that the methane migration can be related to the geologic setting of the foothills in this area, which shows a gentle compressive deformation. On the contrary, numerous hydrocarbon seepages along the northern Apennines foothills are characterized by thermogenic methane generated at depth and presently trapped within Tertiary reservoirs. This suggests to take into account the different geologic context as the main control on gas generation and migration. The on-going research is focused upon the petrographic, geochemical and biomaker characteristics of these chimneys to unravel the typology of fluids involved in their formation, their concretioning modality and the fluid expulsion history.",
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T1 - Shallow-water hydrocarbon seepages in the Pleistocene Argille Azzurre Formation

T2 - the chimneys field of Enza river, Northern Apennines, Italy

AU - Capozzi, Rossella

AU - Dinelli, Enrico

AU - Negri, Alessandra

AU - Montagna, Paolo

AU - Oppo, Davide

AU - Picotti, Vincenzo

AU - Scarponi, S.

AU - Taviani, Marco

PY - 2012

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N2 - The geologically young Northern Apennines contain various traces of hydrocarbon seepages, which are linked to fluid migration triggered by the tectonic evolution of the chain and the foredeep. The most known examples, related to comparatively deep water conditions (> 300 m) are clustered in the late Miocene and early-middle Pliocene successions of the region, while their occurrence in shallow water (shelf) settings is very rarely reported. A case in point is represented by the palisade chimneys field recently exhumed along the Enza river banks in the Northern Apennines (Reggio province). Here, a number of modally vertical, metric-high columnar chimneys ranging in diameter from 10 to 35 cm, affect the Argille Azzurre Fm, biostratigraphically dated at the Early Pleistocene (nannoplancton zone MNN19). Such columnar concretions are clearly formed by the moderate cementation of the pelitic sediments. Macropaleontological content (mainly bivalves) documents that this unit was deposited in an open marine muddy shelfal setting in a bathymetry range of about 50-70 m. Within the Enza river Argille Azzurre succession some biogenic gas leakages still occur. Preliminary studies suggest that the methane migration can be related to the geologic setting of the foothills in this area, which shows a gentle compressive deformation. On the contrary, numerous hydrocarbon seepages along the northern Apennines foothills are characterized by thermogenic methane generated at depth and presently trapped within Tertiary reservoirs. This suggests to take into account the different geologic context as the main control on gas generation and migration. The on-going research is focused upon the petrographic, geochemical and biomaker characteristics of these chimneys to unravel the typology of fluids involved in their formation, their concretioning modality and the fluid expulsion history.

AB - The geologically young Northern Apennines contain various traces of hydrocarbon seepages, which are linked to fluid migration triggered by the tectonic evolution of the chain and the foredeep. The most known examples, related to comparatively deep water conditions (> 300 m) are clustered in the late Miocene and early-middle Pliocene successions of the region, while their occurrence in shallow water (shelf) settings is very rarely reported. A case in point is represented by the palisade chimneys field recently exhumed along the Enza river banks in the Northern Apennines (Reggio province). Here, a number of modally vertical, metric-high columnar chimneys ranging in diameter from 10 to 35 cm, affect the Argille Azzurre Fm, biostratigraphically dated at the Early Pleistocene (nannoplancton zone MNN19). Such columnar concretions are clearly formed by the moderate cementation of the pelitic sediments. Macropaleontological content (mainly bivalves) documents that this unit was deposited in an open marine muddy shelfal setting in a bathymetry range of about 50-70 m. Within the Enza river Argille Azzurre succession some biogenic gas leakages still occur. Preliminary studies suggest that the methane migration can be related to the geologic setting of the foothills in this area, which shows a gentle compressive deformation. On the contrary, numerous hydrocarbon seepages along the northern Apennines foothills are characterized by thermogenic methane generated at depth and presently trapped within Tertiary reservoirs. This suggests to take into account the different geologic context as the main control on gas generation and migration. The on-going research is focused upon the petrographic, geochemical and biomaker characteristics of these chimneys to unravel the typology of fluids involved in their formation, their concretioning modality and the fluid expulsion history.

M3 - Abstract

SP - 23

ER -