On the age of the Late Cretaceous tonalitic/gabbroic batholith on Aruba, Netherlands Antilles (southern Caribbean borderland)

  • H.N.A. Priem Z. W. O. Laboratorium voor Isotopen-Geologie, De Boelelaan 1085, 1081 HV Amsterdam, The Netherlands
  • D.J. Beets Rijks Geologische Dienst, Spaarne 17, 2011 CD Haarlem, The Netherlands
  • N.A.I.M. Boelrijk Z. W. O. Laboratorium voor Isotopen-Geologie, De Boelelaan 1085, 1081 HV Amsterdam, The Netherlands
  • E.H. Hebeda Z. W. O. Laboratorium voor Isotopen-Geologie, De Boelelaan 1085, 1081 HV Amsterdam, The Netherlands

Abstract

Rb-Sr data of tonalitic whole-rocks and biotites and K-Ar data of hornblendes, biotites and mafic wholerocks are reported from the crystalline core of Aruba, a remnant of a Late Cretaceous oceanic island arc that collided in the Santonian (between approximately 88 Ma and 83-84 Ma ago) with the passive margin of northern South America. The age data are interpreted to indicate that the intrusion of the composite (tonalite/gabbro) batholith took place 88.5 ± 0.8Ma ago, in the Coniacian or around the Turonian/Coniacian boundary. This confirms that the intrusion has occurred prior to the collision. The tonalites of the batholith have an initial 87Sr/86Sr ratio of 0.70351 ± 0.00014. Thermal events about 72 Ma and possibly about 62 Ma ago have led to some isotopic resetting.

Published
1986-01-01
How to Cite
H.N.A. Priem, D.J. Beets, N.A.I.M. Boelrijk, & E.H. Hebeda. (1986). On the age of the Late Cretaceous tonalitic/gabbroic batholith on Aruba, Netherlands Antilles (southern Caribbean borderland). Netherlands Journal of Geosciences, 247-256. Retrieved from https://njgjournal.nl/index.php/njg/article/view/13147
Issue
Volume 65 - 1986
Section
Regular paper

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