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Sedimentary structures and facies of fine grained deep water carbonate turbidites in a Paleocene-Middle Eocene flysch complex, Monte Sporno, northern Apennines, Italy

Calner, Mikael (1996) In Dissertations in Geology at Lund University
Department of Geology
Abstract
The Monte Sporno flysch unit consists of regularly alternating calcareous turbidites and subordinate hemipelagic clays, deposited in a basin plain environment near, but above, the calcite compensation depth (CCD). Evidence for turbidity current emplacement includes sole markings, Bouma intervals and resedimented shallow-water microfossil species in a deep-water trace fossil assemblage (Nereites ichnofacies). Three main compositionary facies with different provenance has been distinguished mainly on basis of terrigenous influx, sedimentary structures, trace fossils, calcium carbonate content and present microfossils. These are siliciclastic turbidite facies, where primary and secondary sedimentary structures (Bourna intervals) are well... (More)
The Monte Sporno flysch unit consists of regularly alternating calcareous turbidites and subordinate hemipelagic clays, deposited in a basin plain environment near, but above, the calcite compensation depth (CCD). Evidence for turbidity current emplacement includes sole markings, Bouma intervals and resedimented shallow-water microfossil species in a deep-water trace fossil assemblage (Nereites ichnofacies). Three main compositionary facies with different provenance has been distinguished mainly on basis of terrigenous influx, sedimentary structures, trace fossils, calcium carbonate content and present microfossils. These are siliciclastic turbidite facies, where primary and secondary sedimentary structures (Bourna intervals) are well developed, and carbonate turbidite facies, where biogenic structures are common and well developed (mainly ichnogenera Chondrites, Zoophycos and Helminthoida). The carbonates were derived from north , while erosional structures indicate a west-southwestern source area for the clastics. The third facies is represented by hemipelagic clays. These are distinguished from turbidite derived clays in colour, thickness, micro fabric, calcium carbonate content and finally , because they represent a recurrent facies that complete Bouma intervals. It is also shown that upward decrease of calcium carbonate content through turbidites is directly related to the different depositional processes i.e. turbiditic deposition and hemipelagic settling. (Less)
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author
Calner, Mikael
supervisor
organization
year
type
H1 - Master's Degree (One Year)
subject
keywords
calcareous turbidites, flysch, Monte Sporno, Northern Apennines, calcite compensation depth, sedimentary structures, hemipelagic clays, Bouma sequence, basin plain, provenance
publication/series
Dissertations in Geology at Lund University
report number
70
language
English
id
2369902
date added to LUP
2012-10-23 11:12:06
date last changed
2012-10-23 11:12:06
@misc{2369902,
  abstract     = {The Monte Sporno flysch unit consists of regularly alternating calcareous turbidites and subordinate hemipelagic clays, deposited in a basin plain environment near, but above, the calcite compensation depth (CCD). Evidence for turbidity current emplacement includes sole markings, Bouma intervals and resedimented shallow-water microfossil species in a deep-water trace fossil assemblage (Nereites ichnofacies). Three main compositionary facies with different provenance has been distinguished mainly on basis of terrigenous influx, sedimentary structures, trace fossils, calcium carbonate content and present microfossils. These are siliciclastic turbidite facies, where primary and secondary sedimentary structures (Bourna intervals) are well developed, and carbonate turbidite facies, where biogenic structures are common and well developed (mainly ichnogenera Chondrites, Zoophycos and Helminthoida). The carbonates were derived from north , while erosional structures indicate a west-southwestern source area for the clastics. The third facies is represented by hemipelagic clays. These are distinguished from turbidite derived clays in colour, thickness, micro fabric, calcium carbonate content and finally , because they represent a recurrent facies that complete Bouma intervals. It is also shown that upward decrease of calcium carbonate content through turbidites is directly related to the different depositional processes i.e. turbiditic deposition and hemipelagic settling.},
  author       = {Calner, Mikael},
  keyword      = {calcareous turbidites,flysch,Monte Sporno,Northern Apennines,calcite compensation depth,sedimentary structures,hemipelagic clays,Bouma sequence,basin plain,provenance},
  language     = {eng},
  note         = {Student Paper},
  series       = {Dissertations in Geology at Lund University},
  title        = {Sedimentary structures and facies of fine grained deep water carbonate turbidites in a Paleocene-Middle Eocene flysch complex, Monte Sporno, northern Apennines, Italy},
  year         = {1996},
}