Neoproterozoic chemostratigraphy and correlation of the Port Askaig glaciation, Dalradian Supergroup of Scotland

被引：97
|
作者：
Brasier, MD
Shields, G
机构：
[1] Univ Oxford, Dept Earth Sci, Oxford OX1 3PR, England
[2] Univ Ottawa, Ottawa Carleton Geosci Ctr, Ottawa, ON K1N 6N5, Canada
来源：
JOURNAL OF THE GEOLOGICAL SOCIETY | 2000年 / 157卷
关键词：
Neoproterozoic; Dalradian; glaciation; chemostratigraphy;
D O I：
10.1144/jgs.157.5.909
中图分类号：
P [天文学、地球科学];
学科分类号：
07 ;
摘要：
The delta(13)C of preglacial carbonates beneath the glaciogenic Port Askaig Formation falls from +5 parts per thousand to negative values, while least-altered Sr-87/Sr-86 values are close to 0.7067. Postglacial 'cap carbonates' of the Bonahaven Formation begin with negative delta(13)C(carb) values, jumping sharply to +11.7 parts per thousand near the top, which we correlate with excursions above the Elbobreen-Wilsonbreen glaciations of Svalbard and putative Sturtian (not Varanger) glaciations elsewhere, dated at c. 720 Ma. Much of the succeeding Terminal Neoproterozoic is missing in NE Svalbard and East Greenland, raising doubts about their use for global Sr and C isotope curves in the Neoproterozoic.
引用
收藏
页码：909 / 914
页数：6
相关论文
共 50 条
  • [21] 87Sr/86Sr chemostratigraphy of Neoproterozoic Dalradian limestones of Scotland and Ireland:: constraints on depositional ages and time scales
    Thomas, CW
    Graham, CM
    Ellam, RM
    Fallick, AE
    JOURNAL OF THE GEOLOGICAL SOCIETY, 2004, 161 : 229 - 242
  • [22] Evidence, or not, for the late Tonian break-up of Rodinia? The Dalradian Supergroup, Scotland
    Prave, A. R.
    Fallick, A. E.
    Kirsimae, K.
    JOURNAL OF THE GEOLOGICAL SOCIETY, 2023, 180 (02)
  • [23] GLACIOMARINE MODEL FOR UPPER PRECAMBRIAN DIAMICTITES OF THE PORT ASKAIG FORMATION, SCOTLAND - COMMENT
    FAIRCHILD, IJ
    GEOLOGY, 1985, 13 (01) : 89 - 89
  • [24] Detrital zircon, detrital titanite and igneous clast U-Pb geochronology and basement-cover relationships of the Colonsay Group, SW Scotland: Laurentian provenance and correlation with the Neoproterozoic Dalradian Supergroup
    McAteer, Claire A.
    Daly, J. Stephen
    Flowerdew, Michael J.
    Connelly, James N.
    Housh, Todd B.
    Whitehouse, Martin J.
    PRECAMBRIAN RESEARCH, 2010, 181 (1-4) : 21 - 42
  • [25] U-Pb detrital zircon geochronology of the Dalradian Supergroup, Shetland Islands, Scotland: implications for regional correlations and Neoproterozoic-Palaeozoic basin development
    Strachan, R. A.
    Prave, A. R.
    Kirkland, C. L.
    Storey, C. D.
    JOURNAL OF THE GEOLOGICAL SOCIETY, 2013, 170 (06) : 905 - 916
  • [26] GLACIOMARINE MODEL FOR UPPER PRECAMBRIAN DIAMICTITES OF THE PORT-ASKAIG FORMATION, SCOTLAND
    EYLES, CH
    EYLES, N
    GEOLOGY, 1983, 11 (12) : 692 - 696
  • [27] Provenance of intra-Rodinian basin-fills: The Lower Dalradian Supergroup, Scotland
    Banks, C. J.
    Smith, M.
    Winchester, J. A.
    Horstwood, M. S. A.
    Noble, S. R.
    Ottley, C. J.
    PRECAMBRIAN RESEARCH, 2007, 153 (1-2) : 46 - 64
  • [28] Indicators of relative completeness of the glacial record of the Port Askaig Formation, Garvellach Islands, Scotland
    Ali, Dilshad O.
    Spencer, Anthony M.
    Fairchild, Ian J.
    Chew, Ken J.
    Anderton, Roger
    Levell, Bruce K.
    Hambrey, Michael J.
    Dove, Dayton
    Le Heron, Daniel P.
    PRECAMBRIAN RESEARCH, 2018, 319 : 65 - 78
  • [29] INTEGRATED CHEMOSTRATIGRAPHY AND BIOSTRATIGRAPHY OF THE WINDERMERE SUPERGROUP, NORTHWESTERN CANADA - IMPLICATIONS FOR NEOPROTEROZOIC CORRELATIONS AND THE EARLY EVOLUTION OF ANIMALS
    NARBONNE, GM
    KAUFMAN, AJ
    KNOLL, AH
    GEOLOGICAL SOCIETY OF AMERICA BULLETIN, 1994, 106 (10) : 1281 - 1292
  • [30] More air-fall tuffs from the southern highland group, dalradian supergroup, Scotland
    Batchelor, RA
    SCOTTISH JOURNAL OF GEOLOGY, 2004, 40 : 181 - 184
12345