Research Commons
      • Browse 
        • Communities & Collections
        • Titles
        • Authors
        • By Issue Date
        • Subjects
        • Types
        • Series
      • Help 
        • About
        • Collection Policy
        • OA Mandate Guidelines
        • Guidelines FAQ
        • Contact Us
      • My Account 
        • Sign In
        • Register
      View Item 
      •   Research Commons
      • University of Waikato Research
      • Science and Engineering
      • Science and Engineering Papers
      • View Item
      •   Research Commons
      • University of Waikato Research
      • Science and Engineering
      • Science and Engineering Papers
      • View Item
      JavaScript is disabled for your browser. Some features of this site may not work without it.

      Thermal history of the early Miocene Waitemata Basin and adjacent Waipapa Group, North Island, New Zealand

      Raza, Asaf; Brown, Roderick W.; Balance, Peter F.; Hill, Kevin C.; Kamp, Peter J.J.
      Thumbnail
      Files
      Thermal history.pdf
      2.476Mb
      DOI
       10.1080/00288306.1999.9514838
      Link
       www.royalsociety.org.nz
      Find in your library  
      Citation
      Export citation
      Raza, A., Brown, R. W., Balance, P. F., Hill, K. C. & Kamp, P. J. J. (1999). Thermal history of the early Miocene Waitemata Basin and adjacent Waipapa Group, North Island, New Zealand. New Zealand Journal of Geology and Geophysics, 42, 469-488.
      Permanent Research Commons link: https://hdl.handle.net/10289/3489
      Abstract
      Apatite fission track (AFT) and vitrinite reflectance (VR) data for early Miocene outcrops from the Waitemata Basin reveal that the basin sequence was subjected to shallow burial before denudation. AFT results suggest that the total sediment thickness within the basin was <=1 km and maximum paleotemperatures during burial never exceeded c. 60deg.C. Statistical analyses of the detrital AFT ages distinguish four dominant sources of sediment supply: contemporaneous volcanism; metagreywacke rocks of the Waipapa Group; the Northland Allochthon; and an unidentified source south of the basin.

      The apatite and zircon fission track results from the Waipapa Group rocks (Gondwana Terrane) adjacent to the basin suggest two discrete phases of accelerated cooling: the first during the early Cretaceous (c. 117 Ma) and the second during the mid Cretaceous (c. 84 Ma). These events probably reflect key stages in the tectonic development of the New Zealand microcontinent during the Cretaceous period, the earlier event being related to the climax of compressional deformation (Rangitata Orogeny) and the latter to extensional tectonism associated with the opening of the Tasman Sea. Waipapa Group rocks now exposed at the surface cooled from maximum paleotemperatures of c. 250deg.C at an estimated rate of c. 180-36deg.C/m.y., involving substantial denudation.
      Date
      1999
      Type
      Journal Article
      Rights
      This article has been published in the journal: New Zealand Journal of Geology and Geophysics. ©1999 The Royal Society of New Zealand.
      Collections
      • Science and Engineering Papers [3122]
      Show full item record  

      Usage

      Downloads, last 12 months
      115
       
       
       

      Usage Statistics

      For this itemFor all of Research Commons

      The University of Waikato - Te Whare Wānanga o WaikatoFeedback and RequestsCopyright and Legal Statement