New Zealand Journal of Marine and Freshwater Research abstracts

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Mineralogy and geochemistry of sediments from Lakes Taupo and Waikaremoana, New Zealand

M. KOYAMA¹

M. KAWASHIMA²

T. TAKAMATSU³

G. P. GLASBY⁴

P. STOPPERS⁵

¹Research Reactor Institute Kyoto University, Kumatori Sennangun, Osaka 590-04, Japan

²department of Chemistry Shiga University, Hirazu-cho Ohtsu, 502 Japan

³Water and Soil Environmental Division National Institute for Environmental Studies Yatabe, Tsukuba, 305 Japan

⁴New Zealand Oceanographic Institute Division of Water Sciences Department of Scientific and Industrial Research Private Bag, Kilbirnie, Wellington, New Zealand

⁵Geologisch-PalaontologischesInstitut Universitat Kiel Olshausenstrasse 40/60, D-2300 Kiel Federal Republic of Germany

Abstract Sediments from Lakes Taupo and Waikaremoana, New Zealand, have been analysed to give background concentrations of trace elements in lakes relatively uninfluenced by anthropogenic contributions. Lake Waikaremoana sediments have higher contents of illite, chlorite, smectite, plagioclase, and quartz as well as higher contents of Al, Fe, Na, K, Mg, Ti, P, V, Cr, Co, Ni, Zn, Rb, Sr, Ba, Sc, U, Th, and Rare Earth Elements (REE), than Lake Taupo sediments. Diagenetic enrichment of Mn, Ni, Cu, Zn, P, As, and Fe was observed in surface sediments of certain cores from Lake Taupo where the surface sediment layer was preserved during coring.

Keywords Lake Taupo; Lake Waikaremoana; lake sediments; mineralogy; geochemistry

New Zealand Journal of Marine and Freshwater Research, 1989, Vol. 23: 121-130 0028-8330/89/2301-O121$2.50/0 © Crown copyright 1989 Received 25 May 1987; accepted 14 June 1988

PDF file of entire paper: medium quality (730K); (scanned from paper original: notes about this process)

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