Bruns, Peter; Dullo, Wolf-Christian; Hay, William W.; Wold, Christopher Ned; Pernicka, Ernst (1996): Iridium concentration as an estimation of instantaneous sediment accumulation rates. Society of Economic Paleontologists and Mineralogists, Tulsa, OK, United States, Journal of Sedimentary Research, 66 (3), 608-612, georefid:1996-069285

Abstract:
Ir concentrations and mass accumulation rates from nine deep-sea cores, one from the Atlantic Ocean and eight from the Pacific Ocean, were compiled to evaluate a new technique for determining mass accumulation rates. The technique is based on the large difference of the high Ir abundance in extraterrestrial matter versus the low Ir contents in terrestrial material. Assuming a constant flux of cosmic matter, this difference leads to high Ir concentrations in slowly accumulating sediments, versus low Ir concentration in rapidly accumulating sediments. The method is independent of stratigraphic control, and does not require knowledge of age of the deposit. We note that Ir concentrations in some slowly accumulating sediments are of the same order of magnitude as some of those reported for the Cretaceous-Tertiary boundary event.
Coverage:
West: -129.4614 East: 2.5548 North: 67.1330 South: -18.4823
Relations:
Expedition: 104
Site: 104-642
Expedition: 92
Site: 92-597
Data access:
Provider: SEDIS Publication Catalogue
Data set link: http://sedis.iodp.org/pub-catalogue/index.php?id=1996-069285 (c.f. for more detailed metadata)
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