@book{107,
  author = {Doris St{\"u}ben and Utz Kramar and ZSOLT BERNER and J{\"o}rg-Detlef Eckhardt and Wolfgang Stinnesbeck and Gerta Keller and Thierry Adatte and Klaus Heide},
  title = {Special Paper 356: Two anomalies of platinum group elements above the Cretaceous-Tertiary boundary at Beloc, Haiti: Geochemical context and consequences for the impact scenario},
  abstract = {<p>A detailed geochemical investigation of an expanded Cretaceous-Tertiary (K-T) boundary section near Beloc (B3), Haiti, reveals a complex pattern of sedimentation of multiple origins as a result of erosional, biogenic, volcanic, and impact events. Carbonate-rich uppermost Maastrichtian sediments with high excess rates for Cu, Zn, and Sr (biogenic origin) indicate high productivity (δ<sup>13</sup>C) and warm temperatures (δ<sup>18</sup>O). These sediments are overlain by Paleocene (early Danian zone P1a) spherulerich clayey layers that indicate lower productivity, lower temperatures, and high input of glass and biogenic carbonate. Reworked Maastrichtian sediments are mixed with spherule-rich layers. This spherule-rich deposit is topped by a thin layer rich in Fe that also contains an Ir-dominated anomaly of platinum group elements (PGE) with an almost chondritic abundance pattern, which appears to be the result of a cosmic influx. Monotonous limestones above this interval reflect recovery to normal pelagic sedimentation, which is interrupted by a second PGE anomaly in an Fe-rich clayey layer in the middle part of zone P1a. All PGEs are enriched in this interval and the PGE pattern is basalt like, suggesting a volcanic source. Both PGE anomaly horizons coincide with productivity and temperature changes.\&nbsp; <a href="https://geoweb.princeton.edu/research/keller/pubs/Stuben_et_all_2002_Haiti.pdf" target="_blank">PDF</a></p>
},
  year = {2002},
  volume = {356},
  pages = {163 - 188},
  publisher = {Geological Society of America},
  url = {http://www.gsajournals.org/perlserv/?request=get-specialpub-toc\&isbn=0-8137-2356-6http://specialpapers.gsapubs.org/cgi/doi/10.1130/0-8137-2356-6.163},
  doi = {10.1130/0-8137-2356-610.1130/0-8137-2356-6.163},
  language = {eng},
}