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Sedimentology and palynofacies analysis of Jurassic rocks Eriksdal, Skåne, Sweden

Saeed, Muhammad LU (2013) In Dissertations in Geology at Lund University GEOR02 20122
Department of Geology
Abstract
A sedimentlogical and palynological study of samples from the Middle Jurassic Fuglunda Member, Mariedal Formation at Eriksdal, Skåne, Sweden, has been carried out. The section is dominated by sandstone with minor units of coal, claystone, siltstone and conglomerate. The depositional environment has been interpreted as a coastal setting, perhaps a delta system with mixed influences of fluvial, tidal and wave processes. Twenty-four samples processed for the palynological study revealed rich and well-preserved assemblages of dispersed organic matter but their composition varies significantly. Forty-two pollen and spore species were identified. Wood remains, amorphous organic matter, cuticles and fungal spores were also recorded in the... (More)
A sedimentlogical and palynological study of samples from the Middle Jurassic Fuglunda Member, Mariedal Formation at Eriksdal, Skåne, Sweden, has been carried out. The section is dominated by sandstone with minor units of coal, claystone, siltstone and conglomerate. The depositional environment has been interpreted as a coastal setting, perhaps a delta system with mixed influences of fluvial, tidal and wave processes. Twenty-four samples processed for the palynological study revealed rich and well-preserved assemblages of dispersed organic matter but their composition varies significantly. Forty-two pollen and spore species were identified. Wood remains, amorphous organic matter, cuticles and fungal spores were also recorded in the samples. The coal samples have almost the same palynomorph content as samples from adjacent clastic sediments, except 23A and 23B, which are devoid of pollen and spores. The Fuglunda member palynoflora is dominated by gymnosperms, most notably Perinopollenites elatoides. Most of the species are long-ranging; however, a few species are stratigraphically significant (Neoraistrickia gristhorpensis, Todisporites minor, Callialasporites microvelatus). These index taxa suggest that the studied samples are of Bajocian–Bathonian (Middle Jurassic) age. The occurrence of the key environmental indices Gleicheniidites senonicus, Cyathidites, Classopollis and Perinopollenites suggests a warm and humid palaeoclimate for the Eriksdal area. The composition of the Fuglunda member palynoflora, together with its Thermal Alteration Index (TAI = 2) and Spore Colour Index (SCI = 4), reveal that the organic matter is gas-prone and is immature to produce hydrocarbons. (Less)
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author
Saeed, Muhammad LU
supervisor
organization
course
GEOR02 20122
year
type
H2 - Master's Degree (Two Years)
subject
keywords
Fuglunda member, Jurassic, pollen, spores, palynomorph, gymnosperms
publication/series
Dissertations in Geology at Lund University
report number
330
language
English
additional info
External supervisor: Stephen McLoughlin, Swedish Museum of Natural History, Stockholm
id
3630209
date added to LUP
2013-04-04 16:09:11
date last changed
2013-04-04 16:09:11
@misc{3630209,
  abstract     = {A sedimentlogical and palynological study of samples from the Middle Jurassic Fuglunda Member, Mariedal Formation at Eriksdal, Skåne, Sweden, has been carried out. The section is dominated by sandstone with minor units of coal, claystone, siltstone and conglomerate. The depositional environment has been interpreted as a coastal setting, perhaps a delta system with mixed influences of fluvial, tidal and wave processes. Twenty-four samples processed for the palynological study revealed rich and well-preserved assemblages of dispersed organic matter but their composition varies significantly. Forty-two pollen and spore species were identified. Wood remains, amorphous organic matter, cuticles and fungal spores were also recorded in the samples. The coal samples have almost the same palynomorph content as samples from adjacent clastic sediments, except 23A and 23B, which are devoid of pollen and spores. The Fuglunda member palynoflora is dominated by gymnosperms, most notably Perinopollenites elatoides. Most of the species are long-ranging; however, a few species are stratigraphically significant (Neoraistrickia gristhorpensis, Todisporites minor, Callialasporites microvelatus). These index taxa suggest that the studied samples are of Bajocian–Bathonian (Middle Jurassic) age. The occurrence of the key environmental indices Gleicheniidites senonicus, Cyathidites, Classopollis and Perinopollenites suggests a warm and humid palaeoclimate for the Eriksdal area. The composition of the Fuglunda member palynoflora, together with its Thermal Alteration Index (TAI = 2) and Spore Colour Index (SCI = 4), reveal that the organic matter is gas-prone and is immature to produce hydrocarbons.},
  author       = {Saeed, Muhammad},
  keyword      = {Fuglunda member,Jurassic,pollen,spores,palynomorph,gymnosperms},
  language     = {eng},
  note         = {Student Paper},
  series       = {Dissertations in Geology at Lund University},
  title        = {Sedimentology and palynofacies analysis of Jurassic rocks Eriksdal, Skåne, Sweden},
  year         = {2013},
}