Citation:

j.orggeochem.2012.11.005

Name: Biomarker proxies on ODP Holes 151-912A and 151-912B
Published: 2013
License: https://creativecommons.org/licenses/by/3.0/

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Abstract:

A novel and promising biomarker proxy for reconstruction of Arctic sea ice conditions was developed and is based on the determination of a highly branched isoprenoid with 25 carbons (IP25). IP25 records have been restricted to the last 150 kyr BP. We present a biomarker record from Ocean Drilling Program (ODP) Site 912, going back to the Pliocene–Pleistocene boundary and indicating that sea ice of variable extent occurred in the Fram Strait/southern Yermak Plateau area at least since about 2.2 Ma. Furthermore, our data support the idea that a combination of IP25 and open water, phytoplankton biomarker data (“PIP25 index”) may give a more reliable and quantitative estimate of past sea ice cover (at least for the study area). The study reveals that the novel IP25/PIP25 biomarker approach has potential for semi-quantitative paleo-sea ice studies covering the entire Quaternary and could motivate further detailed high resolution research on ODP/IODP material using this proxy.

Project(s):

Paleoenvironmental Reconstructions from Marine Sediments @ AWI (AWI_Paleo)

Coverage:

Median Latitude: 79.959050 * Median Longitude: 5.456300 * South-bound Latitude: 79.958900 * West-bound Longitude: 5.456000 * North-bound Latitude: 79.959200 * East-bound Longitude: 5.456600

Date/Time Start: 1993-08-27T13:45:00 * Date/Time End: 1993-08-28T20:17:00

Minimum DEPTH, sediment/rock: 3.000 m * Maximum DEPTH, sediment/rock: 133.100 m

Event(s):

151-912A * Latitude: 79.959200 * Longitude: 5.456000 * Date/Time Start: 1993-08-27T13:45:00 * Date/Time End: 1993-08-28T09:37:00 * Elevation: -1050.0 m * Penetration: 145.4 m * Recovery: 118.37 m * Location: North Greenland Sea * Campaign: * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 16 cores; 145.4 m cored; 0 m drilled; 81.4 % recovery

151-912B * Latitude: 79.958900 * Longitude: 5.456600 * Date/Time Start: 1993-08-28T09:37:00 * Date/Time End: 1993-08-28T20:17:00 * Elevation: -1049.0 m * Penetration: 40.5 m * Recovery: 41.77 m * Location: North Greenland Sea * Campaign: * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 5 cores; 40.5 m cored; 0 m drilled; 103.1 % recovery

Parameter(s):

#	Name	Short Name	Unit	Principal Investigator	Method/Device	Comment
1	Event label	Event		Fahl, Kirsten
2	Sample code/label	Sample label		Fahl, Kirsten
3	DEPTH, sediment/rock	Depth sed	m	Fahl, Kirsten		Geocode
4	Carbon, organic, total	TOC	%	Stein, Ruediger	Element analyser CHN, LECO
5	2,6,10,14-Tetramethyl-7-(3-methylpent-4-enyl)pentadecane, per unit mass total organic carbon	IP25/TOC	µg/g	Fahl, Kirsten	Gas chromatography
6	2,10,14-Trimethyl-6-enyl-7-(3-methylpent-1-enyl)pentadecene, per unit mass total organic carbon	C25 HBI diene/TOC	µg/g	Fahl, Kirsten	Gas chromatography - Mass spectrometry (GC-MS)
7	(9Z)-2,6,10,14-Tetramethyl-7-(3-methylpent-4-enyliden)pentadeca-9-ene, per unit mass total organic carbon	C25 HBI (Z) triene/TOC	µg/g	Fahl, Kirsten	Gas chromatography
8	(9E)-2,6,10,14-Tetramethyl-7-(3-methylpent-4-enyliden)pentadeca-9-ene, per unit mass total organic carbon	C25 HBI (E) triene/TOC	µg/g	Fahl, Kirsten	Gas chromatography
9	24-Methylcholesta-5,22E-dien-3beta-ol, per unit mass total organic carbon	Brassicasterol/TOC	µg/g	Fahl, Kirsten
10	24-ethylcholest-5-en-3beta-ol, per unit mass total organic carbon	b-Sitosterol/TOC	µg/g	Fahl, Kirsten
11	Long-chain n-alkanes, C27+C29+C31, per unit mass total organic carbon	C27+C29+C31/TOC	µg/g	Fahl, Kirsten	Gas chromatography
12	Phytoplankton biomarker Brassicasterol IP25 index	PBIP25		Fahl, Kirsten	Calculated

License:

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

Size:

170 data points

Data

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

1 Event	2 Sample label	3 Depth sed [m]	4 TOC [%]	5 IP25/TOC [µg/g]	6 C25 HBI diene/TOC [µg/g]	7 C25 HBI (Z) triene/TOC [µg/g]	8 C25 HBI (E) triene/TOC [µg/g]	9 Brassicasterol/TOC [µg/g]	10 b-Sitosterol/TOC [µg/g]	11 C27+C29+C31/TOC [µg/g]	12 PBIP25
151-912A	151-912A-1H-3,0-5	3.000	1.010	1	2.320	2.16	1.46	24.32	16.36	156.46	0.83
151-912A	151-912A-2H-6,0-5	11.500	0.500	0	0.000	0.00	0.00	1.05	3.24	91.19	#1.00
151-912A	151-912A-3H-7,62-67	23.120	0.680	0	0.240	0.92	0.32	8.96	30.33	159.63	0.73
151-912A	151-912A-4H-7,55-60	32.550	0.790	0	0.000	<0.10	0.00	1.33	15.34	124.87	0.89
151-912A	151-912A-5H-7,65-70	42.150	1.140	0	0.850	1.30	0.56	53.30	37.60	120.04	0.41
151-912A	151-912A-6H-7,73-78	51.730	1.240	0	0.330	0.97	0.38	4.93	27.70	126.39	0.81
151-912A	151-912A-7H-7,74-79	61.240	0.980	0	0.670	1.76	0.79	108.21	47.06	127.69	0.28
151-912A	151-912A-9X-6,65-70	78.650	1.160	0	0.750	9.17	4.39	73.73	37.38	214.61	0.38
151-912A	151-912A-10X-5,0-5	84.000	0.930	0	0.590	3.90	1.43	59.18	70.27	317.55	0.37
151-912A	151-912A-11X-7,0-5	96.410	0.620	0	0.190	0.51	0.28	8.20	45.67	251.26	0.49
151-912A	151-912A-13X-4,0-5	111.240	0.720	0	1.320	1.49	0.93	41.32	102.90	652.47	0.55
151-912A	151-912A-15X-6,0-5	133.100	0.690	0	0.290	2.51	1.27	47.73	103.59	310.66	0.45
151-912B	151-912B-1H-3,145-150	4.450	1.070	1	0.770	1.15	0.68	24.42	12.76	108.97	0.76
151-912B	151-912B-2H-4,145-150	11.250	0.680	0	0.230	0.61	0.46	4.87	4.71	88.05	0.83
151-912B	151-912B-3H-3,145-150	19.250	0.450	0	0.260	0.34	0.19	3.01	7.73	103.74	0.89
151-912B	151-912B-4H-4,0-5	28.800	1.370	0	0.480	3.77	1.41	47.64	19.33	83.26	0.40
151-912B	151-912B-5H-7,63-68	38.400	1.190	0	0.280	1.05	0.32	38.11	21.51	66.95	0.39