Age constraints on Oligocene sedimentation in the Torquay Basin, southeastern Australia
作者: S. McLarenM. W. WallaceS. J. GallagherJ. A. DickinsonA. McAllister
作者单位: 1School of Earth Sciences, University of Melbourne, Australia
刊名: Australian Journal of Earth Sciences, 2009, Vol.56 (4), pp.595-604
来源数据库: Taylor & Francis Journal
DOI: 10.1080/08120090902806347
关键词: argon-argon datinggeochronologyJanjukianstrontium-isotope stratigraphyTertiary
原始语种摘要: The Otway, Gippsland and central coast basins (including the Torquay Basin, Sorrento Graben and Port Phillip Basin) preserve one of the most complete records of Mesozoic and Cenozoic sedimentation in southern Australia. However, robust age constraints on sedimentation are scarce. Strontium isotope analysis of calcitic bioclasts from the Jan Juc Marl of the Torquay Group, Torquay Basin, gives a range of possible ages between 24.2 and 27.9 Ma for the Jan Juc Marl, and an age of 24.24 Ma (+1.3 Ma, -1.2 Ma) for the base of the Point Addis Limestone. These data demonstrate that the Jan Juc Marl and the lower Point Addis Limestone are age-equivalent facies representing deep- and shallow-water sedimentation, respectively. 40Ar/39Ar whole-rock analysis of the underlying Angahook Formation basalt...
全文获取路径: Taylor & Francis  (合作)
影响因子:1.468 (2012)

  • Oligocene 渐新世的
  • Basin 水池
  • Australia 澳大利亚
  • sedimentation 沉积酌
  • southeastern 在东南的
  • constraints 系统规定参数