van Eijden, AJM; Ganssen, Gerald M (1995): Stable carbon and oxygen istotope ratios of Oligocene foraminifera from ODP Hole 121-758A of the northern Ninetyeast Ridge, Indian Ocean (Appendix 1) [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.691305, Supplement to: van Eijden, AJM; Ganssen, GM (1995): An Oligocene multi-species foraminiferal oxygen and carbon isotope record from ODP Hole 758A (Indian Ocean): paleoceanographic and paleo-ecologic implications. Marine Micropaleontology, 25(1), 47-65, https://doi.org/10.1016/0377-8398(94)00028-L
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Abstract:
An Oligocene-basal Miocene (Zones P19-P22/N4) oxygen and carbon isotope stratigraphy is presented based on mixed benthic foraminiferal faunas and different species of planktic foraminifers from Eastem Indian Ocean ODP Hole 758A. Lack of covariance in planktic and benthic delta18O ratios indicates that many Oligocene sea level fluctuations, including the major fall at 30 Ma, are not of glacio-eustatic origin. Delta18O values suggest that test morphology is a poor indicator of preferred depth habitat of Oligocene planktic foraminifers. Also, some groups show considerable shifts in preferred depth habitat. Reconstructed surface water temperature was nearly constant during the investigated period, but even assuming a large Antarctic icecap, values are unrealistically low, 18°-20°C. Most likely, water masses with markedly different oxygen isotopic composition existed, this poses great problems for quantitative temperature reconstructions.
Planktic foraminiferal species show similar delta13C ratios, indicating well-mixed surface waters. This contrasts with the strong oxygen isotopic gradient, which suggests well-stratified surface waters. During the Oligocene the difference in delta13C ratio between the average ratio of planktic foraminiferal species and the benthic foraminifers (Delta delta13C P-B') shows an inverse relation with the known circulation intensity record and thus with productivity. This Delta delta13C pattern is interpreted as being caused by the presence of younger bottom waters at this site during periods with lower temperatures and/or larger Antarctic ice sheets.
Project(s):
Ocean Drilling Program (ODP)
Coverage:
Latitude: 5.384200 * Longitude: 90.361200
Date/Time Start: 1988-06-15T23:50:00 * Date/Time End: 1988-06-24T13:30:00
Minimum ORDINAL NUMBER: 1 * Maximum ORDINAL NUMBER: 45
Event(s):
121-758A * Latitude: 5.384200 * Longitude: 90.361200 * Date/Time Start: 1988-06-15T23:50:00 * Date/Time End: 1988-06-24T13:30:00 * Elevation: -2935.0 m * Penetration: 676.8 m * Recovery: 453.83 m * Location: Indian Ocean * Campaign: Leg121 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 73 cores; 676.8 m cored; 0 m drilled; 67.1 % recovery
Comment:
Test sizes >250 µm, plus some important 125-250 µm species from selected samples.
Parameter(s):
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
418 data points
Data
1 Ord No | 2 Sample label | 3 Foram benth δ18O [‰ PDB] | 4 Foram benth δ13C [‰ PDB] | 5 C. dissimilis δ18O [‰ PDB] | 6 C. dissimilis δ13C [‰ PDB] | 7 Catapsydrax spp. δ18O [‰ PDB] | 8 Catapsydrax spp. δ13C [‰ PDB] | 9 C. unicavus δ18O [‰ PDB] | 10 C. unicavus δ13C [‰ PDB] | 11 F. kugleri δ18O [‰ PDB] | 12 F. kugleri δ13C [‰ PDB] | 13 G. euapertura δ18O [‰ PDB] | 14 G. euapertura δ13C [‰ PDB] | 15 G. galavisi δ18O [‰ PDB] | 16 G. galavisi δ13C [‰ PDB] | 17 G. tripartita δ18O [‰ PDB] | 18 G. tripartita δ13C [‰ PDB] | 19 Jenkinsella spp. δ18O [‰ PDB] | 20 Jenkinsella spp. δ13C [‰ PDB] | 21 G. sellii δ18O [‰ PDB] | 22 G. sellii δ13C [‰ PDB] | 23 G. binaiensis δ18O [‰ PDB] | 24 G. binaiensis δ13C [‰ PDB] | 25 G. suteri δ18O [‰ PDB] | 26 G. suteri δ13C [‰ PDB] | 27 Foram plankt δ18O [‰ PDB] | 28 Foram plankt δ13C [‰ PDB] | 29 Comment |
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
1 | 121-758A-20X-1,110-115 | 1.29 | 1.50 | |||||||||||||||||||||||||
2 | 121-758A-20X-1,115-120 | 1.96 | 0.58 | -1.26 | 2.03 | -0.15 | 1.49 | 0.71 | 1.55 | -0.72 | 1.61 | cf. Globigerina euapertura; Jenkinsella spp.: high standard deviation | ||||||||||||||||
3 | 121-758A-20X-2,115-120 | -0.83 | 1.66 | Foraminifera spp. is Globoquadrina dehiscens | ||||||||||||||||||||||||
4 | 121-758A-20X-CC | 2.89 | 0.86 | -0.56 | 2.00 | 0.07 | 1.56 | 0.71 | 1.91 | 0.69 | 1.60 | 0.27 | 2.01 | 0.24 | 0.89 | Foraminifera spp. is cf. Globigerinina quinqueloba | ||||||||||||
5 | 121-758A-21X-1,110-115 | 1.73 | 0.52 | 0.98 | 0.86 | 0.11 | 0.91 | 0.46 | 1.06 | |||||||||||||||||||
6 | 121-758A-21X-2,116121 | 2.62 | 0.38 | 0.79 | 0.94 | 0.93 | 1.02 | -0.94 | 1.69 | 0.25 | 0.87 | 0.16 | 1.39 | 0.54 | 1.31 | 0.26 | 1.11 | 0.24 | 1.06 | Foraminifera spp. is Globoquadrina praedehiscens | ||||||||
7 | 121-758A-21X-2,116-121 | -0.03 | 0.55 | Foraminifera spp. is cf. Globigerinina quinqueloba | ||||||||||||||||||||||||
8 | 121-758A-21X-2,116-121 | 0.57 | 1.19 | -0.40 | 1.18 | Foraminifera spp. is Globoquadrina altispira globosa | ||||||||||||||||||||||
9 | 121-758A-21X-3,118-123 | 1.87 | 0.40 | 0.89 | 1.08 | 0.20 | 1.25 | -0.13 | 1.51 | 0.52 | 1.38 | -0.93 | 1.11 | -0.38 | 1.06 | cf. Globigerina binaiensis: high standard deviation questionable | ||||||||||||
10 | 121-758A-21X-4,115-12 | 0.98 | 0.83 | -1.27 | 1.69 | 0.21 | 0.93 | 0.68 | 1.18 | -0.16 | 0.39 | Globorotaloides suteri cf. Globigerinina quinqueloba | ||||||||||||||||
11 | 121-758A-21X-5,115-120 | 2.45 | 0.91 | 0.03 | 1.15 | 0.55 | 1.31 | -0.67 | 1.24 | -0.08 | 1.42 | |||||||||||||||||
12 | 121-758A-21X-CC | 1.74 | 0.24 | -0.20 | 1.19 | 0.55 | 1.56 | -0.85 | 1.34 | -0.73 | 0.99 | |||||||||||||||||
13 | 121-758A-22X-1,115-120 | 2.12 | 0.39 | -0.21 | 1.08 | 0.66 | 1.19 | -1.02 | 0.76 | 0.09 | 1.22 | Jenkinsella spp.: High standard deviation; Globigerina binaiensis includes Globigerina sellii | ||||||||||||||||
14 | 121-758A-22X-2,115-120 | 1.70 | 0.20 | -0.17 | 1.16 | 0.86 | 1.42 | |||||||||||||||||||||
15 | 121-758A-22X-3,115-120 | 1.97 | 0.26 | -0.11 | 0.99 | 0.91 | 1.27 | -1.01 | 0.71 | -0.24 | 0.32 | -1.30 | 0.83 | Jenkinsella spp.: High standard deviation; Foraminifera spp. is Tenuitella angustiumbilicata | ||||||||||||||
16 | 121-758A-22X-4,115-120 | 1.77 | -0.05 | |||||||||||||||||||||||||
17 | 121-758A-22X-CC | 1.68 | -0.20 | 1.05 | 1.06 | -0.32 | 1.03 | 0.48 | 1.26 | -0.88 | 1.11 | mainly Catapsydrax dissimilis | ||||||||||||||||
18 | 121-758A-23X-1,111-116 | 2.19 | 0.36 | 0.15 | 1.00 | 0.64 | 1.12 | -0.07 | 1.01 | Globigerina binaiensis includes Globigerina sellii | ||||||||||||||||||
19 | 121-758A-23X-2,119-124 | 2.20 | 0.27 | 1.39 | 0.92 | 0.01 | 1.16 | 0.82 | 1.40 | -0.08 | 1.11 | mainly Catapsydrax dissimilis; Globigerina euapertura high standard deviation; Globigerina binaiensis includes Globigerina sellii | ||||||||||||||||
20 | 121-758A-23X-2,119-124 | 0.01 | 1.16 | Globigerina euapertura high standard deviation | ||||||||||||||||||||||||
21 | 121-758A-23X-3,118-123 | 1.75 | 0.05 | 0.12 | 0.95 | 0.59 | 1.41 | 0.15 | 0.46 | |||||||||||||||||||
22 | 121-758A-23X-3,118-123 | 2.21 | -0.04 | Mixed benthics: Stilostomellidsa only | ||||||||||||||||||||||||
23 | 121-758A-23X-4,115-119 | 2.28 | 0.44 | -0.05 | 1.09 | 0.56 | 1.31 | |||||||||||||||||||||
24 | 121-758A-23X-5,115-119 | 0.71 | 1.41 | |||||||||||||||||||||||||
25 | 121-758A-23X-5,115-119 | 1.93 | 0.27 | 0.15 | 1.17 | -0.03 | 1.36 | 0.76 | 1.59 | 0.38 | 0.35 | Globigerina galavisi high standard deviation | ||||||||||||||||
26 | 121-758A-23X-CC | 1.92 | 0.03 | 1.40 | 0.92 | -0.02 | 0.83 | 0.85 | 1.33 | -0.34 | 0.72 | -0.15 | 1.09 | |||||||||||||||
27 | 121-758A-24X-1,133-138 | 1.97 | 0.00 | 0.01 | 0.89 | 0.31 | 1.12 | Globigerina euapertura high standard deviation | ||||||||||||||||||||
28 | 121-758A-24X-2,32-37 | 1.65 | 0.41 | -0.01 | 0.89 | 0.64 | 1.19 | -0.04 | 0.78 | |||||||||||||||||||
29 | 121-758A-24X-3,8-13 | 1.91 | 0.10 | 0.07 | 0.85 | 0.47 | 1.04 | 0.52 | 0.91 | |||||||||||||||||||
30 | 121-758A-24X-4,20-25 | 2.28 | 0.12 | 1.38 | 0.70 | -0.12 | 0.91 | -0.29 | 0.96 | 0.52 | 1.13 | 0.44 | 0.99 | 0.20 | 0.92 | Catapsydrax spp. High standard deviation; Globigerina galavisi high standard deviation | ||||||||||||
31 | 121-758A-24X-CC | -0.47 | 0.91 | |||||||||||||||||||||||||
32 | 121-758A-24X-CC | 2.13 | 0.28 | 1.48 | 0.69 | 0.00 | 0.67 | -0.29 | 0.96 | 0.49 | 0.94 | 0.67 | 0.80 | |||||||||||||||
33 | 121-758A-25X-1,115-120 | 1.09 | 0.51 | -0.14 | 0.76 | -0.48 | 0.90 | 0.53 | 0.94 | 0.64 | 0.71 | 0.06 | 0.71 | Globigerina galavisi high standard deviation; cf. Globigerina sellii | ||||||||||||||
34 | 121-758A-25X-2,115-120 | 2.22 | -0.09 | 0.50 | 1.04 | 0.49 | 0.83 | 1.12 | 0.95 | |||||||||||||||||||
35 | 121-758A-25X-3,115-120 | 2.16 | -0.18 | 0.03 | 0.86 | 0.57 | 0.99 | 0.60 | 0.85 | 0.98 | 0.09 | |||||||||||||||||
36 | 121-758A-25X-4,115-120 | 2.08 | 0.07 | 0.52 | 1.01 | 0.19 | 0.63 | 0.54 | 0.58 | Jenkinsella spp.: High standard deviation | ||||||||||||||||||
37 | 121-758A-25X-4,115-120 | -0.29 | 0.71 | |||||||||||||||||||||||||
38 | 121-758A-25X-5,115-120 | 0.51 | 0.85 | |||||||||||||||||||||||||
39 | 121-758A-25X-5,115-120 | 2.23 | 0.03 | 1.43 | 0.56 | 0.07 | 0.86 | 0.51 | 0.93 | 0.51 | 0.75 | mainly Catapsydrax unicavus | ||||||||||||||||
40 | 121-758A-25X-CC | 2.20 | 0.21 | 1.33 | 0.60 | -0.20 | 0.74 | 0.30 | 0.85 | 0.39 | 0.67 | mainly Catapsydrax unicavus | ||||||||||||||||
41 | 121-758A-26X-1,98-103 | 2.12 | 0.28 | -0.13 | 0.78 | 0.20 | 0.71 | |||||||||||||||||||||
42 | 121-758A-26X-2,100-105 | 2.08 | 0.38 | |||||||||||||||||||||||||
43 | 121-758A-26X-3,90-95 | 1.65 | 0.45 | -0.22 | 1.03 | 0.08 | 1.10 | |||||||||||||||||||||
44 | 121-758A-26X-4,90-95 | 2.11 | 0.58 | -0.02 | 1.14 | 0.18 | 1.10 | 0.69 | 0.88 | |||||||||||||||||||
45 | 121-758A-26X-CC | 1.94 | 0.38 | 1.43 | 1.11 | -0.11 | 1.00 | -0.02 | 1.41 | 0.59 | 0.90 | 0.56 | 1.10 | mainly Catapsydrax unicavus; Jenkinsella spp.: High standard deviation; Foraminifera spp. is Globigerina eocaena |