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A new Cretaceous-Tertiary boundary site at Flaxbourne River, New Zealand - Biostratigraphy and geochemistryOn the basis of biostratigraphy data, it is shown that the Flaxbourne River Cretaceous-Tertiary boundary is among the most complete and least disturbed marine sequences yet found; this is particularly true with respect to its post-Ir anomaly and prelowermost Paleocene sequence. INAA and ICP analyses reveal that the boundary clay is also enriched in Cr and Ni, mainly from meteoritic material, and As, Co, Cu, Sb, and Zn from terrestrial sources. It is found that Zn/Sb, As/Sb, and Zn/As ratios generally fall between crustal and oceanic values, suggesting contributions from both sources.
Document ID
19880032666
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Strong, C. P.
(New Zealand Geological Survey Lower Hutt, United States)
Brooks, Robert R.
(New Zealand Geological Survey Lower Hutt., United States)
Wilson, Shane M.
(New Zealand Geological Survey Lower Hutt., United States)
Reeves, Roger D.
(Massey University Palmerston North, New Zealand)
Orth, Charles J.
(Los Alamos National Laboratory NM, United States)
Date Acquired
August 13, 2013
Publication Date
October 1, 1987
Publication Information
Publication: Geochimica et Cosmochimica Acta
Volume: 51
ISSN: 0016-7037
Subject Category
Geophysics
Accession Number
88A19893
Funding Number(s)
CONTRACT_GRANT: NSF EAR-86-09218
CONTRACT_GRANT: NAG9-52
Distribution Limits
Public
Copyright
Other

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