Abstract
A new, modified model of the Kajak tube core sampler is presented. The new sampler is intended for use on soft sediments, and hence of light weight (12 kg). The improved sampler offers the following advantages. (1) increased robustness, (2) simplified attachment of the coring tube to the holder and valve assembly, permitting quick exchange of sampling tubes, (3) unimpeded flow of water through the tube during slow descent, (4) a reliable, automatic mechanism closing the top of the core tube after impact, and (5) an easily dismantled supporting frame, which also protects the sampler from damage against the side of the boat in rought weather. The operation of the sampler has been observedin situ and during ordinary shipboard collection of core samples, with satisfactory results.
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Blomqvist, S.: Reliability of core sampling of soft bottom sediment—anin situ study. Sedimentology 32, 605–612 (1985).
Brinkhurst, R. O., Chua, K. E., and Batoosingh, E.: Modifications in sampling procedures as applied to studies on the bacteria and tubificid oligochaetes inhabiting aquatic sediments. J. Fish. Res. Bd. Can. 26, 2581–2593 (1969).
Evans, H. E.: Gravity core sampling in recent lake sediments: the influence of core tube diameter on recovering short cores, 96 p. M.Sci. thesis, Dept. Biol., Trent Univ., Peterborough, Ont., Can. (1982).
Evans, H. E., and Lasenby, D. C.: A comparison of lead and zinc sediment profiles from cores taken by diver and a gravity corer. Hydrobiologia 108, 165–169 (1984).
Kajak, Z., Kacprzak, K., and Polkowski, R.: Tubular bottom sampler. (In Polish with English summary). Ekol. Pol. B 11, 159–165 (1965).
Moore, T. C., Jr, and Heath, G. R.: Sea-floor sampling techniques. In: Riley, J. P., and Chester, R. (eds.), Chemical oceanography, 2nd ed., vol. 7, 75–126, Academic Press, London, U.K. (1978).
Weaver, P. P. E., and Schulthesis, P. J., Detection of repenetration and sediment disturbance in open-barrel gravity cores. J. Sed. Petrol. 53, 649–654 (1983).
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Blomqvist, S., Abrahamsson, B. An improved Kajak-type gravity core sampler for soft bottom sediments. Schweiz. Z. Hydrol 47, 81–84 (1985). https://doi.org/10.1007/BF02538187
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DOI: https://doi.org/10.1007/BF02538187