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Dating of rocks from the Bungonia district, New South Wales.

Journal Article


Abstract


  • The lower part of the Bungonia limestone contains Ludlovian (Late Silurian) fossils, but no age-diagnostic fauna have been identified from the upper part of the formation nor from the overlying Tangerang volcanic rocks. The K/Ar age determination reported here from the Tangerang volcanics (399 m.y.) appears to be too low, suggesting radiogenic Ar loss. K/Ar data for the S part of the Marulan batholith yield a mean age of 398 m.y. (Early Devonian). Since the Tangerang volcanics overlie the Bungonia limestone and are intruded by the Marulan batholith they are probably Early Devonian. It is suggested that the Tangerang volcanics are a correlative of the Bindook porphyry. -N.C.N.S.

Publication Date


  • 1980

Citation


  • Carr, P. F., Jones, B. G., & Wright, A. J. (1980). Dating of rocks from the Bungonia district, New South Wales.. Proceedings of the Linnean Society of New South Wales, 104, 111-117.

Scopus Eid


  • 2-s2.0-0019103567

Web Of Science Accession Number


Start Page


  • 111

End Page


  • 117

Volume


  • 104

Abstract


  • The lower part of the Bungonia limestone contains Ludlovian (Late Silurian) fossils, but no age-diagnostic fauna have been identified from the upper part of the formation nor from the overlying Tangerang volcanic rocks. The K/Ar age determination reported here from the Tangerang volcanics (399 m.y.) appears to be too low, suggesting radiogenic Ar loss. K/Ar data for the S part of the Marulan batholith yield a mean age of 398 m.y. (Early Devonian). Since the Tangerang volcanics overlie the Bungonia limestone and are intruded by the Marulan batholith they are probably Early Devonian. It is suggested that the Tangerang volcanics are a correlative of the Bindook porphyry. -N.C.N.S.

Publication Date


  • 1980

Citation


  • Carr, P. F., Jones, B. G., & Wright, A. J. (1980). Dating of rocks from the Bungonia district, New South Wales.. Proceedings of the Linnean Society of New South Wales, 104, 111-117.

Scopus Eid


  • 2-s2.0-0019103567

Web Of Science Accession Number


Start Page


  • 111

End Page


  • 117

Volume


  • 104