Computer Science
Scientific paper
Jul 1964
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1964gecoa..28.1039h&link_type=abstract
Geochimica et Cosmochimica Acta, vol. 28, Issue 7, pp.1039-1053
Computer Science
1
Scientific paper
In order to obtain more reliable and comprehensive geochemical figures about tin. neutron activation analyses were undertaken for widely selected materials of geochemical interests. Analyses are given for 35 silicic (av. 3.6 ppm Sn). 19 intermediate (av. 1.5 ppm). 3 mafic (av. 0.9 ppm) and 4 ultramafic rocks (av. 0.35 ppm). Data for 10 red clays (av. 4.9 ppm), 3 globigerina oozes (av. 1.5 ppm) and 4 volcanic muds (av. 1.4 ppm), all of them collected from the Pacific Ocean, and 3 red clays of the Japan Sea (av. 4.1 ppm) are also given. Our results on the abundance values for tin in various types of igneous rocks, as well as of red clays. confirm the figures given by Onishi and Sandell (1957). Contrary to the previous information about the geochemistry of tin, we found that tin should be thought of as being distributed as a "trace element" rather evenly throughout the erustal rocks. Pelagic sediments do not show any marked enrichment of tin compared with igneous rocks. The striking similarity in the concentrations of tin in the pelagic argillaceous sediments, terrestrial clays and igneous rocks suggests a mainly terrigenous origin for the deep-sea sediments rather than one involving the submarine weathering of volcanics and pyroclastics. Sea water samples of the Pacific Ocean give the value of 0-81 /tg Sn/1. as an average. The enrichment factor for tin for marine animals is estimated to be about ~2400 to a good order of magnitude.
Hamaguchi Hiroshi
Hosohara Kyoichi
Kawabuchi Kazuaki
Kuroda Rokuro
Mitsubayashi Tetzuya
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