THE DEVONIAN LACUSTRINE SEDIMENTS OF ORKNEY, SCOTLAND - IMPLICATIONS FOR CLIMATE CYCLICITY, BASIN STRUCTURE AND MATURATION HISTORY

被引:53
|
作者
ASTIN, TR
机构
[1] Postgraduate Research Institute for Sedimentology, Reading University, Whiteknights
关键词
D O I
10.1144/gsjgs.147.1.0141
中图分类号
P [天文学、地球科学];
学科分类号
07 ;
摘要
The Orcadian Basin of northern Scotland (largely of Middle Devonian age) is a major lacustrine rift basin, with the widely correlateable, Achanarras/Sandwick lake bed extending for at least 800 km along the rift. Above this lake bed, there are about 540 m of cyclic lacustrine sediments, with lake sedimentation terminated by alluvial fan progadation. The Upper Stromness Flagstone Formation and the Rousay Flagstone Formation making up this lacustrine sequence are given revised and precise definitions within four reference sections from the Orkney Islands. The sequence consists of about 45 first-order cycles averaging about 12m in thickness, which resulted from long-term climatic fluctuations in rainfall with a cycle time-scale of about 25 000 years. Longer climatic fluctuations of about 100000 and 400000 years are also present. These periods correspond to the precession and two eccentricity orbital cycles. Detailed knowledge of the stratigraphy constrains the structural and maturation history of the basin. The basin formed in a series of extensional half graben, and the Orkney area suffered later inversion. The lake sediments first reached the oil window at relatively shallow depths (c. 2000m), probably in the early Carboniferous, implying very high geothermal gradients during the early part of the basin history as corroborated by the presence of Devonian volcanics in the region. In the Orkney area, uplift probably started in the late Carboniferous.
引用
收藏
页码:141 / 151
页数:11
相关论文
共 50 条
  • [41] Vegetation and climate history in the Westeifel Volcanic Field (Germany) during the past 11 000 years based on annually laminated lacustrine maar sediments
    Litt, Thomas
    Schoelzel, Christian
    Kuehl, Norbert
    Brauer, Achim
    BOREAS, 2009, 38 (04) : 679 - 690
  • [42] Trace and rare earth element geochemistry of organic-rich sediments in the lacustrine Rukwa rift basin, Tanzania: implications for paleoproductivity, paleosalinity, and redox conditions
    Bishanga J.M.
    Jin Q.
    Arabian Journal of Geosciences, 2021, 14 (14)
  • [43] Evolution of nanopore structure in lacustrine organic-rich shales during thermal maturation from hydrous pyrolysis, Minhe Basin, Northwest China
    Yang, Shuang
    Chen, Guojun
    Lv, Chengfu
    Li, Chao
    Yin, Na
    Yang, Fei
    Xue, Lianhua
    ENERGY EXPLORATION & EXPLOITATION, 2018, 36 (02) : 265 - 281
  • [44] Even carbon-numbered n-alkanes predominance in lacustrine sediments and its climate significance in Linxia Basin, NE Tibetan Plateau, NW China
    Wang, Yongli
    Fang, Xiaoming
    Li, Yuanmao
    He, Daxiang
    Wu, Yingqin
    Yang, Hui
    Wang, Youxiao
    GEOCHIMICA ET COSMOCHIMICA ACTA, 2010, 74 (12) : A1111 - A1111
  • [45] Sedimentation History of Neogene Lacustrine Sediments of Sueoka Bela Stena Based on Geochemical Parameters(Valjevo-Mionica Basin,Serbia)附视频
    Aleksandra AJNOVI
    Vladimir SIMI
    Branimir JOVANIEVI
    Olga CVETKOVI
    Radovan DIMITRIJEVI
    Nenad GRUBIN
    Acta Geologica Sinica(English Edition), 2008, (06) : 1201 - 1212
  • [46] Heavy minerals of the aeolian sediments in the East Slovak Basin (Western Carpathians) - Implications for their origin, transport process and sedimentary history
    Bonova, Katarina
    Bona, Jan
    Mikus, Tomas
    Ferkova, Andrea
    AEOLIAN RESEARCH, 2024, 66
  • [47] COMPOSITION AND PROVENANCE HISTORY OF LATE CENOZOIC SEDIMENTS IN SOUTHEASTERN BOLIVIA: IMPLICATIONS FOR CHACO FORELAND BASIN EVOLUTION AND ANDEAN UPLIFT
    Hulka, Carola
    Heubeck, Christoph
    JOURNAL OF SEDIMENTARY RESEARCH, 2010, 80 (3-4) : 288 - 299
  • [48] Climate, vegetation and fire history during the past 18,000 years, recorded in high altitude lacustrine sediments on the Sanetti Plateau, Bale Mountains (Ethiopia)
    Betelhem Mekonnen
    Bruno Glaser
    Roland Zech
    Michael Zech
    Frank Schlütz
    Robert Bussert
    Agerie Addis
    Graciela Gil-Romera
    Sileshi Nemomissa
    Tamrat Bekele
    Lucas Bittner
    Dawit Solomon
    Andreas Manhart
    Wolfgang Zech
    Progress in Earth and Planetary Science, 9
  • [49] Climate, vegetation and fire history during the past 18,000 years, recorded in high altitude lacustrine sediments on the Sanetti Plateau, Bale Mountains (Ethiopia)
    Mekonnen, Betelhem
    Glaser, Bruno
    Zech, Roland
    Zech, Michael
    Schluetz, Frank
    Bussert, Robert
    Addis, Agerie
    Gil-Romera, Graciela
    Nemomissa, Sileshi
    Bekele, Tamrat
    Bittner, Lucas
    Solomon, Dawit
    Manhart, Andreas
    Zech, Wolfgang
    PROGRESS IN EARTH AND PLANETARY SCIENCE, 2022, 9 (01)
  • [50] Ground-penetrating radar measurements of subsurface structures of lacustrine sediments in the Qaidam Basin (NW China): Possible implications for future in-situ radar experiments on Mars
    Meng, Xu
    Xu, Yi
    Xiao, Long
    Dang, Yanan
    Zhu, Peimin
    Tang, Chi Pui
    Zhang, Xiaoping
    Liu, Bing
    Gou, Sheng
    Yue, Zongyu
    ICARUS, 2020, 338