As part of Phase 3 of the BGS Faroe-Shetland Consortium project on the Jurassic of the UK sector of the Faroe-Shetland Basin, detailed logging of core from well 206/05-2 was undertaken and samples were taken for palynology in order to provide additional facies information and age determinations. Analysis of kerogen and palynological assemblages revealed a generally poor run of samples lacking good age-diagnostic palynomorphs. A Volgian or younger age is tentatively assigned in Sample 5 at 3172.49 m by the presence of the spore genus Cicatricosisporites

Thomas, J.E.

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CR/17/137  Last modified: 2018/05/01 10:44       Palynology of the interval 3169.84 to 3173.41 m of well 206/05-2, Faroe-Shetland Basin   ENERGY SYSTEMS AND BASIN ANALYSIS PROGRAMME Commissioned Report CR/17/137                          CR/17/137  Last modified: 2018/05/01 10:44        BRITISH GEOLOGICAL SURVEY ENERGY SYSTEMS AND BASIN ANALYSIS PROGRAMME COMMISSIONED REPORT CR/17/137   The National Grid and other Ordnance Survey data © Crown Copyright and database rights 2018. Ordnance Survey Licence No. 100021290 EUL. Keywords Palynology, Jurassic, Faroe-Shetland Basin, Cicatricosisporites. Bibliographical reference THOMAS, J E. 2018.  Palynology of the interval 3169.84 to 3173.41 m of well 206/05-2, Faroe-Shetland Basin. British Geological Survey Commissioned Report, CR/17/137.  7pp. Copyright in materials derived from the British Geological Survey’s work is owned by the Natural Environment Research Council (NERC) and/or the authority that commissioned the work. 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Analysis of kerogen and palynological assemblages revealed a generally poor run of samples lacking good age-diagnostic palynomorphs. A Volgian or younger age is tentatively assigned in Sample 5 at 3172.49 m by the presence of the spore genus Cicatricosisporites.       CR/17/137  Last modified: 2018/05/01 10:44  2 1 Introduction and method As part of Phase 3 of the BGS Faroe-Shetland Consortium project on the Jurassic of the UK sector of the Faroe-Shetland Basin, detailed logging of core from well 206/05-2 was undertaken and samples were taken for palynology in order to provide additional facies information and age determinations. The samples were prepared using standard acid maceration techniques. The residues were mounted onto glass slides for microscopic examination. The slides are held in the BGS collections in Keyworth. Counts of kerogen types were carried out on unoxidised residues. Palynological analysis was carried out on oxidised material. Sample details are set out in Appendix 1. 2 Palynology Summary descriptions follow. Detailed palynological data is set out in Appendix 2. 2.1 SAMPLE 1 (3169.84 M) – VOLGIAN OR YOUNGER This is a very sparse organic residue yielding very few palynomorphs and no age-diagnostic material. The kerogen assemblage is dominated by woody material (26%) and amorphous organic material (AOM, 65%).  2.2 SAMPLES 2 AND 3 (3170.97 AND 3171.16 M) – VOLGIAN OR YOUNGER These samples yielded moderately productive organic residues containing long-ranging spores and pollen indicating the Jurassic or Cretaceous such as the spores Baculatisporites commaumensis, Cyathidites minor, Gleicheniidites sp. and Retitriletes austroclavatidite, and pollen including undifferentiated bisaccates, Araucariacites australis, Cerebropollenites macroverrucosus, Classopollis classoides, Exesipollenites scabratus and Perinoplooenites elatoides. Marine taxa are absent. The kerogen assemblage is dominated by woody and plant material.  2.3 SAMPLES 4 TO 6 (3171.79 TO 3173.41 M) – VOLGIAN OR YOUNGER These are very sparse organic residues yielding very few palynomorphs – mostly long-ranging Mesozoic spores and pollen. The lower three kerogen assemblages are dominated by woody material (50–67%). Palynomorphs are rare and poorly preserved (corroded). However, a specimen of the spore genus Cicatricosisporites in sample 5 (3172.49 m) suggests a Volgian or younger age at this level. An indeterminate peridinioid dinoflagellate cyst is present in sample 4 (3171.79 m) suggesting marine influence at that level. 3 Conclusions This generally poor run of samples lacks good age-diagnostic palynomorphs. A Volgian or younger age is tentatively assigned in Sample 5 at 3172.49 m by the presence of the spore genus Cicatricosisporites. References DÖRHÖFER, G. 1979. Distribution and stratigraphic utility of Oxfordian to Valanginian miospores in Europe and North America. American Association of Stratigraphic Palynologists Contributions Series, 5B, 101–132.   CR/17/137  Last modified: 2018/05/01 10:44  3 Appendix 1 – Sample details (measured depths).. INFORMAL No. BGS MPA No. DEPTH (m) SSK No. 1 67617 3169.84 63868 2 67616 3170.97 63867 3 67615 3171.16 63866 4 67614 3171.79 63865 5 67613 3172.49 63864 6 67612 3173.41 63863   CR/17/137  Last modified: 2018/05/01 10:44  4 Appendix 2 – Palynology data.   Number 1 2 3 4 5 6MPA Number 67617 67616 67615 67614 67613 67612Depth 3169.84 3170.97 3171.16 3171.79 3172.49 3173.41Age interpretation Indet.Palaeoenvironment ?MarinePTERIDOPHYTE SPORESBaculatisportites commaumensis X X XCicatricosisporites sp. XContignisporites cookksonii XCyathidites minor X X X XGleicheniidites sp. X XKyrtomisporis sp. ?Neoraistrickia sp. XRetitriletes austroclavatidites X X XSpore - indeterminate X XStaplinisporites caminus XTorosisporis sp. XGYMNOSPERM POLLENAraucariacites australis X X X X XBisaccate pollen undiff. X X X XCerebropllenites macroverrucosus X X XClassopollis classoides X X X XExesipollenites scabratus X X XMonocolpate sp.Perinopollenites elatoides X X XDINOFLAGELLATE CYSTSPeridinioid cyst indet. ?KEROGEN TYPE PERCENTAGESWood 26 7 22 67 59 50Plant fragments 9 87 50 16 38 8Palynomorphs 0 2 12 2 1 0Amorph. organic material (AOM) 65 4 16 15 2 42Well 206/05-2Terrestrial taxa onlyTerrestrial taxa onlyVolgian or younger

Palynology of the interval 3169.84 to 3173.41 m of well 206/05-2, Faroe-Shetland Basin

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Palynology of the interval 3169.84 to 3173.41 m of well 206/05-2, Faroe-Shetland Basin

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