Citation:

35053041

Name: Stable carbon and oxygen isotope ratios of benthic and planktonic foraminifera of ODP Hole 171-1049C
Published: 2000
License: https://creativecommons.org/licenses/by/3.0/

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Abstract:

Ocean anoxic events were periods of high carbon burial that led to drawdown of atmospheric carbon dioxide, lowering of bottom-water oxygen concentrations and, in many cases, significant biological extinction (Arthur et al., 1990; Erbacher et al., 1996, doi:10.1130/0091-7613(1996)024<0499:EPORAO>2.3.CO;2; Kuypers et al., 1999, doi:10.1038/20659; Jenkyns, 1997; Hochuli et al., 1999, doi:10.1130/0091-7613(1999)027<0657:EOHPAC>2.3.CO;2). Most ocean anoxic events are thought to be caused by high productivity and export of carbon from surface waters which is then preserved in organic-rich sediments, known as black shales. But the factors that triggered some of these events remain uncertain. Here we present stable isotope data from a mid-Cretaceous ocean anoxic event that occurred 112 Myr ago, and that point to increased thermohaline stratification as the probable cause. Ocean anoxic event 1b is associated with an increase in surface-water temperatures and runoff that led to decreased bottom-water formation and elevated carbon burial in the restricted basins of the western Tethys and North Atlantic. This event is in many ways similar to that which led to the more recent Plio-Pleistocene Mediterranean sapropels, but the greater geographical extent and longer duration (~46 kyr) of ocean anoxic event 1b suggest that processes leading to such ocean anoxic events in the North Atlantic and western Tethys were able to act over a much larger region, and sequester far more carbon, than any of the Quaternary sapropels.

Project(s):

Ocean Drilling Program (ODP)

Coverage:

Latitude: 30.142270 * Longitude: -76.112110

Date/Time Start: 1997-01-16T00:30:00 * Date/Time End: 1997-01-16T00:30:00

Minimum DEPTH, sediment/rock: 140.885 m * Maximum DEPTH, sediment/rock: 144.920 m

Event(s):

171-1049C * Latitude: 30.142270 * Longitude: -76.112110 * Date/Time: 1997-01-16T00:30:00 * Elevation: -2670.8 m * Penetration: 158.5 m * Recovery: 88.86 m * Location: Blake Nose, North Atlantic Ocean * Campaign: * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 13 cores; 111.5 m cored; 47 m drilled; 79.7 % recovery

Parameter(s):

#	Name	Short Name	Unit	Principal Investigator	Method/Device	Comment
1	Sample code/label	Sample label		Erbacher, Jochen	DSDP/ODP/IODP sample designation
2	DEPTH, sediment/rock	Depth sed	m			Geocode
3	Hedbergella aff. trocoidea, δ13C	H. aff. trocoidea δ13C	‰ PDB	Erbacher, Jochen	Isotope ratio mass spectrometry
4	Hedbergella aff. trocoidea, δ13C, standard deviation	H. aff. trocoidea δ13C std dev	±	Erbacher, Jochen	Isotope ratio mass spectrometry
5	Hedbergella aff. trocoidea, δ18O	H. aff. trocoidea δ18O	‰ PDB	Erbacher, Jochen	Isotope ratio mass spectrometry
6	Hedbergella aff. trocoidea, δ18O, standard deviation	H. aff. trocoidea δ18O std dev	±	Erbacher, Jochen	Isotope ratio mass spectrometry
7	Hedbergella speetonensis, δ13C	H. speetonensis δ13C	‰ PDB	Erbacher, Jochen	Isotope ratio mass spectrometry
8	Hedbergella speetonensis, δ13C, standard deviation	H. speetonensis δ13C std dev	±	Erbacher, Jochen	Isotope ratio mass spectrometry
9	Hedbergella speetonensis, δ18O	H. speetonensis δ18O	‰ PDB	Erbacher, Jochen	Isotope ratio mass spectrometry
10	Hedbergella speetonensis, δ18O, standard deviation	H. speetonensis δ18O std dev	±	Erbacher, Jochen	Isotope ratio mass spectrometry
11	Osangularia schloenbachi, δ13C	O. schloenbachi δ13C	‰ PDB	Erbacher, Jochen	Isotope ratio mass spectrometry
12	Osangularia schloenbachi, δ13C, standard deviation	O. schloenbachi δ13C std dev	±	Erbacher, Jochen	Isotope ratio mass spectrometry
13	Osangularia schloenbachi, δ18O	O. schloenbachi δ18O	‰ PDB	Erbacher, Jochen	Isotope ratio mass spectrometry
14	Osangularia schloenbachi, δ18O, standard deviation	O. schloenbachi δ18O std dev	±	Erbacher, Jochen	Isotope ratio mass spectrometry
15	Gyroidinoides nitidus, δ13C	G. nitidus δ13C	‰ PDB	Erbacher, Jochen	Isotope ratio mass spectrometry
16	Gyroidinoides nitidus, δ13C, standard deviation	G. nitidus δ13C std dev	±	Erbacher, Jochen	Isotope ratio mass spectrometry
17	Gyroidinoides nitidus, δ18O	G: nitidus δ18O	‰ PDB	Erbacher, Jochen	Isotope ratio mass spectrometry
18	Gyroidinoides nitidus, δ18O, standard deviation	G. nitidus δ18O std dev	±	Erbacher, Jochen	Isotope ratio mass spectrometry

License:

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

Size:

398 data points

Data

Download dataset as tab-delimited text — use the following character encoding:

1 Sample label	2 Depth sed [m]	3 H. aff. trocoidea δ13C [‰ PDB]	4 H. aff. trocoidea δ13C std dev [±]	5 H. aff. trocoidea δ18O [‰ PDB]	6 H. aff. trocoidea δ18O std dev [±]	7 H. speetonensis δ13C [‰ PDB]	8 H. speetonensis δ13C std dev [±]	9 H. speetonensis δ18O [‰ PDB]	10 H. speetonensis δ18O std dev [±]	11 O. schloenbachi δ13C [‰ PDB]	12 O. schloenbachi δ13C std dev [±]	13 O. schloenbachi δ18O [‰ PDB]	14 O. schloenbachi δ18O std dev [±]	15 G. nitidus δ13C [‰ PDB]	16 G. nitidus δ13C std dev [±]	17 G: nitidus δ18O [‰ PDB]	18 G. nitidus δ18O std dev [±]
171-1049C-12X-2,11.5	140.915	2.001	0.005	-0.634	0.017	1.861	0.014	-0.456	0.010
171-1049C-12X-2,28	141.080	2.287	0.015	-0.394	0.014	2.100	0.004	-0.278	0.025
171-1049C-12X-2,45	141.125	2.373	0.015	-0.337	0.023	2.287	0.014	-0.229	0.024	1.382	0.010	0.366	0.009
171-1049C-12X-2,66	141.460	2.351	0.011	-0.549	0.010	2.322	0.012	-0.444	0.033	1.265	0.011	0.517	0.010
171-1049C-12X-2,90	141.700	1.867	0.015	-1.087	0.038	1.262	0.017	-1.487	0.016
171-1049C-12X-2,112	141.920									0.456	0.007	-0.123	0.027
171-1049C-12X-2,122	142.020					2.167	0.005	-0.958	0.011
171-1049C-12X-2,132	142.120	2.103	0.014	-1.372	0.036	1.726	0.017	-0.962	0.029	0.244	0.014	-0.177	0.031
171-1049C-12X-2,143	142.230									0.101	0.024	0.138	0.042
171-1049C-12X-3,3	142.330	2.819	0.016	-0.984	0.021	2.262	0.011	-0.803	0.048	1.419	0.011	0.297	0.020	1.102	0.007	0.318	0.024
171-1049C-12X-3,8.5	140.885	2.618	0.022	-0.993	0.016	2.387	0.009	-0.670	0.012
171-1049C-12X-3,14	142.440									1.358	0.007	0.264	0.025
171-1049C-12X-3,14	142.440	2.756	0.015	-1.149	0.022	2.192	0.012	-0.867	0.016	1.187	0.026	0.262	0.074	0.878	0.007	0.186	0.013
171-1049C-12X-3,22.5	142.525	2.611	0.007	-0.186	0.021	2.683	0.013	-0.079	0.010
171-1049C-12X-3,29.5	141.095									1.570	0.004	0.509	0.013	1.352	0.023	0.413	0.033
171-1049C-12X-3,35	142.650	2.992	0.018	-1.558	0.020	2.630	0.019	-1.084	0.015	1.457	0.017	0.371	0.027
171-1049C-12X-3,40	142.700	3.038	0.017	-1.371	0.010	2.520	0.015	-0.821	0.020	1.532	0.006	0.366	0.025
171-1049C-12X-3,43.5	142.735	3.151	0.027	-1.553	0.010	2.588	0.009	-0.829	0.012
171-1049C-12X-3,44.5	142.745	3.073	0.008	-1.595	0.012	2.519	0.007	-0.871	0.027
171-1049C-12X-3,53	142.820	2.907	0.019	-1.670	0.013	2.597	0.011	-1.103	0.013
171-1049C-12X-3,56	142.860	2.816	0.010	-1.797	0.026	2.450	0.007	-1.227	0.017
171-1049C-12X-3,68	142.980	3.005	0.017	-1.405	0.030	2.472	0.012	-0.855	0.016	1.952	0.017	0.260	0.020
171-1049C-12X-3,75	143.050	2.825	0.011	-2.046	0.007	2.403	0.018	-1.386	0.012
171-1049C-12X-3,77.5	143.075	2.795	0.016	-1.952	0.039	2.494	0.024	-1.512	0.020
171-1049C-12X-3,82	143.120													1.019	0.020	0.135	0.026
171-1049C-12X-3,85	143.150	3.294	0.027	-1.604	0.006	2.855	0.005	-1.041	0.018
171-1049C-12X-3,88	143.180	3.198	0.026	-1.513	0.022	2.899	0.011	-1.011	0.012	1.745	0.015	0.405	0.020	1.632	0.004	0.368	0.020
171-1049C-12X-3,90	143.200	2.958	0.016	-1.046	0.007	2.766	0.008	-0.637	0.009	2.049	0.011	0.387	0.020	1.682	0.009	0.373	0.013
171-1049C-12X-3,93.5	141.735									1.713	0.008	0.463	0.005	1.602	0.008	0.438	0.008
171-1049C-12X-3,96.5	141.765									1.615	0.010	0.486	0.012	1.414	0.009	0.423	0.025
171-1049C-12X-3,99	143.290	2.825	0.017	-0.840	0.037	2.572	0.008	-0.640	0.034	1.757	0.012	0.480	0.018	1.448	0.010	0.424	0.015
171-1049C-12X-3,104	143.340	2.409	0.008	-0.291	0.013	2.329	0.010	-0.028	0.012	1.934	0.013	0.439	0.022	1.867	0.010	0.460	0.020
171-1049C-12X-3,131	143.610	2.461	0.019	-0.135	0.028	2.288	0.012	0.100	0.027
171-1049C-12X-3,122										1.067	0.012	0.292	0.006
171-1049C-12X-3,149	143.790	2.739	0.011	-0.287	0.013	2.656	0.011	-0.107	0.019	1.785	0.005	0.764	0.006
171-1049C-12X-4,13	143.930	2.653	0.009	-0.234	0.020	2.499	0.009	-0.097	0.011	1.588	0.011	0.445	0.020
171-1049C-12X-4,58	144.360	2.853	0.013	-0.440	0.014	2.549	0.009	-0.167	0.031
171-1049C-12X-4,112	144.920	2.527	0.018	-0.260	0.040	2.163	0.014	-0.028	0.016