Citation:

odp.proc.sr.121.175.1991

Name: Chemistry of ODP Hole 121-752B samples (Table 2)
Published: 1991
License: https://creativecommons.org/licenses/by/3.0/

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Published: 1991 (exact date unknown) • DOI registered: 2011-05-17

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Abstract:

Fourteen samples spanning a 2.5 m interval that includes the Cretaceous-Tertiary (K/T) boundary from Hole 752B near the crest of Broken Ridge in the eastern Indian Ocean, were studied in order to search for anomalous enrichments of iridium (Ir) and shock-metamorphosed quartz grains. No allogenic quartz grains >10 µm were observed, hence the presence of quartz containing diagnostic evidence of shock-metamorphism could not be confirmed. Two Ir anomalies of 2.2±0.6 and 2.0±0.4 parts per billion (ppb) were measured in samples of dark green ash-bearing chalk at depths of 357.93 and 358.80 mbelow seafloor (mbsf), respectively, (Samples 121-752B-11R-3, 13-14 cm, and 121-752B-11R-3, 100-101 cm) using conventional Instrumental Neutron Activation Analysis (INAA). These samples containing anomalous enrichments of Ir were taken from approximately 82 cm above and 5 cm below the extinction level of Globotruncanids. Our results are consistent with those of Michel et al. (this volume), who observe elevated concentrations of Ir at these depths in addition to a larger Ir anomaly associated with the extinction level of Globotruncanids.

Project(s):

Ocean Drilling Program (ODP)

Coverage:

Latitude: -30.891000 * Longitude: 93.577500

Date/Time Start: 1988-05-18T09:00:00 * Date/Time End: 1988-05-22T12:30:00

Minimum DEPTH, sediment/rock: 357.06 m * Maximum DEPTH, sediment/rock: 359.43 m

Event(s):

121-752B * Latitude: -30.891000 * Longitude: 93.577500 * Date/Time Start: 1988-05-18T09:00:00 * Date/Time End: 1988-05-22T12:30:00 * Elevation: -1097.0 m * Penetration: 435.6 m * Recovery: 112.34 m * Location: South Indian Ridge, South Indian Ocean * Campaign: * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 17 cores; 158 m cored; 0 m drilled; 71.1 % recovery

Parameter(s):

#	Name	Short Name	Unit	Principal Investigator	Method/Device	Comment
1	Identification	ID		Schuraytz, B C
2	Sample code/label	Sample label		Schuraytz, B C	DSDP/ODP/IODP sample designation
3	DEPTH, sediment/rock	Depth sed	m			Geocode
4	Comment	Comment		Schuraytz, B C		color and comments
5	Sample mass	Samp m	g	Schuraytz, B C
6	Sodium oxide	Na2O	%	Schuraytz, B C
7	Sodium oxide, standard deviation	Na2O std dev	±	Schuraytz, B C
8	Potassium oxide	K2O	%	Schuraytz, B C
9	Potassium oxide, standard deviation	K2O std dev	±	Schuraytz, B C
10	Calcium oxide	CaO	%	Schuraytz, B C
11	Calcium oxide, standard deviation	CaO std dev	±	Schuraytz, B C
12	Iron oxide, FeO	FeO	%	Schuraytz, B C
13	Iron oxide, FeO, standard deviation	FeO std dev	±	Schuraytz, B C
14	Scandium	Sc	mg/kg	Schuraytz, B C
15	Scandium, standard deviation	Sc std dev	±	Schuraytz, B C
16	Chromium	Cr	mg/kg	Schuraytz, B C
17	Chromium, standard deviation	Cr std dev	±	Schuraytz, B C
18	Cobalt	Co	mg/kg	Schuraytz, B C
19	Cobalt, standard deviation	Co std dev	±	Schuraytz, B C
20	Nickel	Ni	mg/kg	Schuraytz, B C
21	Nickel, standard deviation	Ni std dev	±	Schuraytz, B C
22	Rubidium	Rb	mg/kg	Schuraytz, B C
23	Rubidium, standard deviation	Rb std dev	±	Schuraytz, B C
24	Caesium	Cs	mg/kg	Schuraytz, B C
25	Caesium, standard deviation	Cs std dev	±	Schuraytz, B C
26	Strontium	Sr	mg/kg	Schuraytz, B C
27	Strontium, standard deviation	Sr std dev	±	Schuraytz, B C
28	Barium	Ba	mg/kg	Schuraytz, B C
29	Barium, standard deviation	Ba std dev	±	Schuraytz, B C
30	Lanthanum	La	mg/kg	Schuraytz, B C
31	Lanthanum, standard deviation	La std dev	±	Schuraytz, B C
32	Cerium	Ce	mg/kg	Schuraytz, B C
33	Cerium, standard deviation	Ce std dev	±	Schuraytz, B C
34	Neodymium	Nd	mg/kg	Schuraytz, B C
35	Neodymium, standard deviation	Nd std dev	±	Schuraytz, B C
36	Samarium	Sm	mg/kg	Schuraytz, B C
37	Samarium, standard deviation	Sm std dev	±	Schuraytz, B C
38	Europium	Eu	mg/kg	Schuraytz, B C
39	Europium, standard deviation	Eu std dev	±	Schuraytz, B C
40	Terbium	Tb	mg/kg	Schuraytz, B C
41	Terbium, standard deviation	Tb std dev	±	Schuraytz, B C
42	Ytterbium	Yb	mg/kg	Schuraytz, B C
43	Ytterbium, standard deviation	Yb std dev	±	Schuraytz, B C
44	Lutetium	Lu	mg/kg	Schuraytz, B C
45	Lutetium, standard deviation	Lu std dev	±	Schuraytz, B C
46	Zirconium	Zr	mg/kg	Schuraytz, B C
47	Zirconium, standard deviation	Zr std dev	±	Schuraytz, B C
48	Hafnium	Hf	mg/kg	Schuraytz, B C
49	Hafnium, standard deviation	Hf std dev	±	Schuraytz, B C
50	Tantalum	Ta	mg/kg	Schuraytz, B C
51	Tantalum, standard deviation	Ta std dev	±	Schuraytz, B C
52	Uranium	U	mg/kg	Schuraytz, B C
53	Uranium, standard deviation	U std dev	±	Schuraytz, B C
54	Thorium	Th	mg/kg	Schuraytz, B C
55	Thorium, standard deviation	Th std dev	±	Schuraytz, B C
56	Arsenic	As	mg/kg	Schuraytz, B C
57	Arsenic, standard deviation	As std dev	±	Schuraytz, B C
58	Selenium	Se	mg/kg	Schuraytz, B C
59	Selenium, standard deviation	Se std dev	±	Schuraytz, B C
60	Antimony	Sb	mg/kg	Schuraytz, B C
61	Antimony, standard deviation	Sb std dev	±	Schuraytz, B C
62	Iridium	Ir	ng/kg	Schuraytz, B C
63	Iridium, standard deviation	Ir std dev	±	Schuraytz, B C
64	Gold	Au	ng/kg	Schuraytz, B C
65	Gold, standard deviation	Au std dev	±	Schuraytz, B C

License:

Creative Commons Attribution 3.0 Unported (CC-BY-3.0)

Size:

938 data points

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