Fission-track age of the Mangaroa ash and tectonic implications at Wellington, New Zealand.

C. W. Naeser; S. Nishimura; Te Punga

doi:10.1080/00288306.1980.10424133

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Fission-track age of the Mangaroa ash and tectonic implications at Wellington, New Zealand.

C. W. Naeser·S. Nishimura·Te Punga

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Abstract

Three samples of zircon from the Mangaroa Ash, an important marker bed in the late Pleistocene deposits of the Wellington area, have been dated by fission-track analysis. The average age of the 3 zircon samples is 380 000 years. Since this tephra fell, vertical uplift at Tinakori Hill on the northwest side of the Wellington Fault has been about 266 m, at a rate of about 69 cm per 1000 years; at the Whakatiki Terraces the minimum rate of uplift on the northwest side of this fault has been about 21 cm per 1000 years. -Authors

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C. W. Naeser, S. Nishimura, Te Punga. 1980. Fission-track age of the Mangaroa ash and tectonic implications at Wellington, New Zealand.. https://doi.org/10.1080/00288306.1980.10424133

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