Thierstein Hans R thierstein@erdw.ethz.ch Asaro Frank Ehrmann Werner ehrmann@rz.uni-leipzig.de http://www.uni-leipzig.de/~geologie/Mitarbeiter/Ehrmann/ehrmann.htm Huber Brian T huberb@si.edu https://naturalhistory.si.edu/staff/brian-huber 0000-0002-0929-3175 Michel Helen V Sakai Hideo Schmitz Birger 1991 Stable isotope ratios, iridium concentrations, and mineralogy of sediments at and around the Cretaceous/Tertiary boundary at ODP Hole 119-738C dataset https://doi.org/10.1594/PANGAEA.758528 Thierstein Hans R thierstein@erdw.ethz.ch Asaro Frank Ehrmann Werner ehrmann@rz.uni-leipzig.de http://www.uni-leipzig.de/~geologie/Mitarbeiter/Ehrmann/ehrmann.htm Huber Brian T huberb@si.edu https://naturalhistory.si.edu/staff/brian-huber 0000-0002-0929-3175 Michel Helen V Sakai Hideo Schmitz Birger 1991 The Cretaceous/Tertiary Boundary at Site 738, southern Kerguelen Plateau book chapter In: Barron, J; Larsen, B; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program) 119 https://doi.org/10.2973/odp.proc.sr.119.157.1991 849-867 High-resolution stratigraphic evidence of an apparently complete carbonate-rich Cretaceous/Tertiary boundary interval in Section 119-738C-20R-5 from the southern Kerguelen Plateau is summarized and interpreted. The change of the calcareous nannoflora and of the planktonic foraminifers is spread over a laminated interval of about 15 cm thickness. The base of this laminated interval lies in uppermost Maestrichtian chalks, 2 cm below a distinct 2-mm-thick "gray clay" layer, which shows the highest iridium enrichment (18 ppb) measured in this section. No shocked quartz or microspherules, characteristic of an impact, were found. No change in the clay mineralogy, which could be expected for a large volcanic or impact event, could be identified. Elevated metal and iridium concentrations (> 1.6 ppb) occur already in the bioturbated uppermost Maestrichtian chalks several centimeters below the "gray clay" and decrease above the iridium peak gradually over a laminated 12-cm-thick interval to background values of 0.1-0.3 ppb Ir. Application of bio- and magnetochronology shows that the accumulation rates of carbonates and clays, but not of the metals, decreased dramatically at the Cretaceous/Tertiary boundary and thus, the lack of dilution may have led to the observed metal concentrations. 82.7878 82.7878 -62.709 -62.709 82.7878 -62.709 1988-01-11T18:45:00 1988-01-17T05:00:00 376.0 389.6 ODP Ocean Drilling Program https://www-odp.tamu.edu:443/ Ocean Drilling Program, Texas A&M University ODP http://www-odp.tamu.edu/ https://ror.org/01f5ytq51 119-738C -62.709 82.7878 Indian Ocean -2263.0 1988-01-11T18:45:00 1988-01-17T05:00:00 Leg119 Leg119 1987-12-14T00:00:00 1987-12-14 1988-02-20T00:00:00 1988-02-20 Joides Resolution https://www-odp.tamu.edu:443/resolutn.html Barron, John A Barron, John A Larsen, Birger Larsen, Birger doi:10.2973/odp.proc.ir.119.1989 Joides Resolution https://www-odp.tamu.edu:443/resolutn.html Drilling/drill rig DRILL 533.8 m 146.03 m 35 cores; 337.2 m cored; 0 m drilled; 43.3 % recovery 260 CC-BY-3.0 Creative Commons Attribution 3.0 Unported https://creativecommons.org/licenses/by/3.0/ The Cretaceous/Tertiary boundary clay is at Section 119-738C-20R-5, 96.0-96.2 cm. The samples for the nannofossil counts and microcarbonate estimates were taken at specific millimeter intervals. The samples for carbonate, clay mineralogical, and geochemical analyses were homogenized over 1-cm intervals and are listed at the corresponding centimeter levels. Sample code/label Sample label DSDP/ODP/IODP sample designation hdl:10013/epic.27914.d001 Thierstein Hans R thierstein@erdw.ethz.ch Sample label DEPTH, sediment/rock Depth sed m depth http://purl.obolibrary.org/obo/PATO_0001595 sediment http://purl.obolibrary.org/obo/ENVO_00002007 rock Length L http://dbpedia.org/resource/Length Depth sed [m] δ18O, carbonate δ18O carb ‰ PDB δ18O http://en.wikipedia.org/wiki/List_of_elements_by_stability_of_isotopes carbonate http://purl.obolibrary.org/obo/CHEBI_41609 Thierstein Hans R thierstein@erdw.ethz.ch fine fraction <38 µm δ18O carb [‰ PDB] δ13C, carbonate δ13C carb ‰ PDB δ13C http://en.wikipedia.org/wiki/List_of_elements_by_stability_of_isotopes carbonate http://purl.obolibrary.org/obo/CHEBI_41609 Thierstein Hans R thierstein@erdw.ethz.ch fine fraction <38 µm δ13C carb [‰ PDB] Iridium Ir ng/kg iridium Thierstein Hans R thierstein@erdw.ethz.ch Ir [ng/kg] Smectite Sme % http://www.mindat.org/min-11116.html Dimensionless Ratio ψ Thierstein Hans R thierstein@erdw.ethz.ch Sme [%] Illite Ill % http://www.mindat.org/min-2011.html illite https://www.mindat.org/min-2011.html Dimensionless Ratio ψ Thierstein Hans R thierstein@erdw.ethz.ch Ill [%] Chlorite Chl % http://www.mindat.org/min-11468.html chlorite http://purl.obolibrary.org/obo/CHEBI_17441 Dimensionless Ratio ψ Thierstein Hans R thierstein@erdw.ethz.ch Chl [%] Calcium carbonate CaCO3 % calcium carbonate http://purl.obolibrary.org/obo/CHEBI_3311 Dimensionless Ratio ψ Thierstein Hans R thierstein@erdw.ethz.ch CaCO3 [%] Microcarbonate Microcarbonate % Dimensionless Ratio ψ Thierstein Hans R thierstein@erdw.ethz.ch Microcarbonate [%] Nannofossils, tertiary Nannos tertiary % Dimensionless Ratio ψ Thierstein Hans R thierstein@erdw.ethz.ch Nannos tertiary [%] supplement citable author21588 author30521 author31059 author33664 author37326 author453 author556 basis5 campaign3397808 campaign91 event13515 geocode1 geocode1599 geocode1600 geocode1601 geocode8128 inst34 license101 method10974 method5059 param2094 param2095 param2204 param295 param296 param297 param70 param790 param98938 param98939 pi21588 project3 ref33804 term1073089 term1073093 term1073131 term1073143 term1073285 term1074204 term20611 term38263 term40831 term41056 term43794 term43863 term44258