Pospichal, James J (2003): (Table T1) Biostratigraphy and distribution of Quaternary and Miocene calcareous nannofossils in ODP Site 188-1165 [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.780564, Supplement to: Pospichal, JJ (2003): Calcareous nannofossils from continental rise Site 1165, ODP Leg 188, Prydz Bay, Antarctica. In: Cooper, AK; O'Brien, PE; Richter, C (eds.) Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 188, 1-14, https://doi.org/10.2973/odp.proc.sr.188.014.2003
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Abstract:
During Ocean Drilling Program (ODP) Leg 188, piston and rotary cores were recovered at three southern Indian Ocean sites on the continental margin in Prydz Bay, Antarctica, in order to obtain a detailed sedimentary record reflecting Cenozoic Antarctic glacial history and paleoenvironments. Coring at continental rise Site 1165 revealed a relatively continuous, ~1000-m, lower Miocene to upper Pliocene section overlain by a thin Quaternary cover. No nannofossils were noted at shelf Site 1166, where a discontinuous, ~343-m section of Quaternary- to Late Cretaceous-age predominantly glacial marine diamictons was recovered. At slope Site 1167, ~447 m of clayey silty sands was recovered, where nannofossils are rare and sporadic but indicate Pleistocene age for at least the upper ~227 m there.
This report focuses on data collected from Site 1165, where Neogene-Quaternary calcareous nannofossils are moderately to well preserved and sporadically present, but abundant in several intervals. Assemblages are characterized by low diversity with one or two dominant taxa. Mid- and low-latitude age-diagnostic marker species are absent. Nannofossil Zone CN15 and Subzones CN14b and CN13b-CN14a were identified in Pleistocene sediments based on the presence of Emiliania huxleyi, Pseudoemiliania lacunosa, and large Gephyrocapsa caribbeanica. Pliocene sediments are barren of nannofossils. Only general age and zonal assignments are possible for the relatively complete Miocene section (as dated by siliceous microfossils). The presence of Minylitha convallis in one sample permits the identification of upper Miocene Zones CN7-CN9. Cyclicargolithus floridanus is used to delineate presence of middle Miocene Zone CN5 and older. Assemblages in samples from the base of the section at Site 1165 are indicative of an early Miocene age (CN1-CN3). Overall, nannofossil assemblages are characterized by dominant Reticulofenestra spp., which are typical of high latitudes. Reticulofenestra perplexa and Reticulofenestra producta form nearly monospecific assemblages in a few intervals. M. convallis has not previously been reported in upper Miocene sediments from the Antarctic margin and likely indicate a brief warming event.
Sporadic nannofossil abundance increases at deepwater (~3500 m) Site 1165 may be due to the following processes or combination of processes: (1) high nannofloral productivity in surface waters around Prydz Bay, possibly associated with warmer intervals; (2) periodic downward fluctuations in the calcium carbonate compensation depth, permitting less dissolution (possibly the result of the first condition); or (3) rapid transport and burial downslope.
Project(s):
Ocean Drilling Program (ODP)
Coverage:
Median Latitude: -64.379583 * Median Longitude: 67.218720 * South-bound Latitude: -64.379650 * West-bound Longitude: 67.218060 * North-bound Latitude: -64.379450 * East-bound Longitude: 67.219050
Date/Time Start: 2000-01-28T15:00:00 * Date/Time End: 2000-02-14T20:30:00
Minimum DEPTH, sediment/rock: 0.200 m * Maximum DEPTH, sediment/rock: 998.220 m
Event(s):
188-1165A * Latitude: -64.379650 * Longitude: 67.219050 * Date/Time Start: 2000-01-28T15:00:00 * Date/Time End: 2000-01-29T05:15:00 * Elevation: -3537.0 m * Penetration: 5.4 m * Recovery: 5.43 m * Location: Indian Ocean * Campaign: Leg188 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 1 core; 5.4 m cored; 0 m drilled; 100.6 % recovery
188-1165B * Latitude: -64.379650 * Longitude: 67.219050 * Date/Time Start: 2000-01-29T05:15:00 * Date/Time End: 2000-02-04T05:30:00 * Elevation: -3537.6 m * Penetration: 682.2 m * Recovery: 434.04 m * Location: Indian Ocean * Campaign: Leg188 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 76 cores; 682.2 m cored; 0 m drilled; 63.6 % recovery
188-1165C * Latitude: -64.379450 * Longitude: 67.218060 * Date/Time Start: 2000-02-04T05:30:00 * Date/Time End: 2000-02-14T20:30:00 * Elevation: -3537.5 m * Penetration: 999.1 m * Recovery: 269.27 m * Location: Indian Ocean * Campaign: Leg188 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 35 cores; 335.7 m cored; 663.4 m drilled; 80.2 % recovery
Comment:
Sediment depth is given in mbsf. Abundance values represent the average number of specimens per ~200 fields of view at 1000x. All slides were examined a minimum of 800 fields of view. Warm intervals: sample 188-1165B-14H-CC,34-44 and samples 188-1165C-18R-3,47-48 to 188-1165C-18R-4,51-52. Barren samples: 188-1165B-2H-7 to 188-1165B-14H-6, 188-1165B-16H-4 to 188-1165B-20H-4, 188-1165B-22X-2 to 188-1165B-24X-3, 188-1165B-28X-1 to 188-1165B-57X, 188-1165B-69X to 188-1165B-73X, 188-1165C-10R to 188-1165C-11R-4, 188-1165C-16R, 188-1165C-20R, 188-1165C-23R-1 to 188-1165C-26R-1 and 188-1165C-34R.
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Event label | Event | ||||
| 2 | Sample code/label | Sample label | Pospichal, James J | DSDP/ODP/IODP sample designation | ||
| 3 | DEPTH, sediment/rock | Depth sed | m | Geocode | ||
| 4 | Nannofossil zone | Nannos zone | Pospichal, James J | |||
| 5 | Epoch | Epoch | Pospichal, James J | |||
| 6 | Nannofossils | Nannos | # | Pospichal, James J | total abundance | |
| 7 | Nannofossils preservation | Nannos preserv | Pospichal, James J | G = good, M = moderate, P = poor | ||
| 8 | Species richness | S | Pospichal, James J | Counting, light microscope | ||
| 9 | Calcidiscus leptoporus | C. leptoporus | # | Pospichal, James J | Counting, light microscope | |
| 10 | Coccolithus pelagicus | C. pelagicus | # | Pospichal, James J | Counting, light microscope | |
| 11 | Emiliania huxleyi | E. huxleyi | # | Pospichal, James J | Counting, light microscope | |
| 12 | Gephyrocapsa aperta | G. aperta | # | Pospichal, James J | Counting, light microscope | |
| 13 | Gephyrocapsa caribbeanica | G. caribbeanica | # | Pospichal, James J | Counting, light microscope | <4 µm |
| 14 | Gephyrocapsa caribbeanica | G. caribbeanica | # | Pospichal, James J | Counting, light microscope | 4-5.5 µm |
| 15 | Gephyrocapsa caribbeanica | G. caribbeanica | # | Pospichal, James J | Counting, light microscope | 5.5-6.5 µm |
| 16 | Gephyrocapsa oceanica | G. oceanica | # | Pospichal, James J | Counting, light microscope | <4 µm |
| 17 | Gephyrocapsa oceanica | G. oceanica | # | Pospichal, James J | Counting, light microscope | 4-5.5 µm |
| 18 | Gephyrocapsa oceanica | G. oceanica | # | Pospichal, James J | Counting, light microscope | 5.5-6.5 µm |
| 19 | Gephyrocapsa ericsonii | G. ericsonii | # | Pospichal, James J | Counting, light microscope | |
| 20 | Gephyrocapsa parallela | G. parallela | # | Pospichal, James J | Counting, light microscope | |
| 21 | Gephyrocapsa spp. | Gephyrocapsa spp. | # | Pospichal, James J | Counting, light microscope | |
| 22 | Helicosphaera carteri | H. carteri | # | Pospichal, James J | Counting, light microscope | |
| 23 | Umbilicosphaera sibogae var. foliosa | U. sibogae var. foliosa | # | Pospichal, James J | Counting, light microscope | |
| 24 | Coccolithus pelagicus | C. pelagicus | # | Pospichal, James J | Counting, light microscope | w/ bar |
| 25 | Pseudoemiliania ovata | P. ovata | # | Pospichal, James J | Counting, light microscope | |
| 26 | Pseudoemiliania lacunosa | P. lacunosa | # | Pospichal, James J | Counting, light microscope | |
| 27 | Reticulofenestra asanoi | R. asanoi | # | Pospichal, James J | Counting, light microscope | |
| 28 | Reticulofenestra perplexa | R. perplexa | # | Pospichal, James J | Counting, light microscope | |
| 29 | Reticulofenestra producta | R. producta | # | Pospichal, James J | Counting, light microscope | |
| 30 | Reticulofenestra pseudoumbilicus | R. pseudoumbilicus | # | Pospichal, James J | Counting, light microscope | |
| 31 | Reticulofenestra pseudoumbilicus | R. pseudoumbilicus | # | Pospichal, James J | Counting, light microscope | >10 µm |
| 32 | Reticulofenestra gelida | R. gelida | # | Pospichal, James J | Counting, light microscope | |
| 33 | Reticulofenestra gelida | R. gelida | # | Pospichal, James J | Counting, light microscope | >10 µm |
| 34 | Reticulofenestra minutula | R. minutula | # | Pospichal, James J | Counting, light microscope | 5-8 µm |
| 35 | Reticulofenestra minutula | R. minutula | # | Pospichal, James J | Counting, light microscope | 3-5 µm |
| 36 | Reticulofenestra spp. | Reticulofenestra spp. | # | Pospichal, James J | Counting, light microscope | |
| 37 | Reticulofenestra haqii | R. haqii | # | Pospichal, James J | Counting, light microscope | 3-5 µm |
| 38 | Reticulofenestra haqii | R. haqii | # | Pospichal, James J | Counting, light microscope | 5-8 µm |
| 39 | Reticulofenestra haqii | R. haqii | # | Pospichal, James J | Counting, light microscope | <3 µm |
| 40 | Reticulofenestra minuta | R. minuta | # | Pospichal, James J | Counting, light microscope | |
| 41 | Placoliths, small | Placoliths small | # | Pospichal, James J | Counting, light microscope | <3 µm, open oval |
| 42 | Placoliths, small | Placoliths small | # | Pospichal, James J | Counting, light microscope | 4-5 µm, open oval |
| 43 | Syracosphaera spp. | Syracosphaera spp. | # | Pospichal, James J | Counting, light microscope | |
| 44 | Umbilicosphaera spp. | Umbilicosphaera spp. | # | Pospichal, James J | Counting, light microscope | |
| 45 | Umbilicosphaera cricota | U. cricota | # | Pospichal, James J | Counting, light microscope | |
| 46 | Pontosphaera spp. | Pontosphaera spp. | # | Pospichal, James J | Counting, light microscope | |
| 47 | Discoaster spp. | Discoaster spp. | # | Pospichal, James J | Counting, light microscope | 6 ray |
| 48 | Discoaster cf. variabilis | D. cf. variabilis | # | Pospichal, James J | Counting, light microscope | |
| 49 | Minylitha convallis | M. convallis | # | Pospichal, James J | Counting, light microscope | |
| 50 | Reticulofenestra rotaria | R. rotaria | # | Pospichal, James J | Counting, light microscope | |
| 51 | Sphenolithus abies | S. abies | # | Pospichal, James J | Counting, light microscope | |
| 52 | Cyclicargolithus floridanus | C. floridanus | # | Pospichal, James J | Counting, light microscope | |
| 53 | Cyclicargolithus floridanus | C. floridanus | # | Pospichal, James J | Counting, light microscope | >9 µm |
| 54 | Reticulofenestra hesslandii | R. hesslandii | # | Pospichal, James J | Counting, light microscope | |
| 55 | Helicosphaera carteri | H. carteri | # | Pospichal, James J | Counting, light microscope | |
| 56 | Reticulofenestra daviesii | R. daviesi | # | Pospichal, James J | Counting, light microscope | |
| 57 | Coronocyclus nitescens | C. nitescens | # | Pospichal, James J | Counting, light microscope | |
| 58 | Reticulofenestra cf. perplexa | R. cf. perplexa | # | Pospichal, James J | Counting, light microscope | |
| 59 | Coccolithus spp. | Coccolithus spp. | # | Pospichal, James J | Counting, light microscope | |
| 60 | Pontosphaera multipora | P. multipora | # | Pospichal, James J | Counting, light microscope | |
| 61 | Sphenolithus spp. | Sphenolithus spp. | # | Pospichal, James J | Counting, light microscope | |
| 62 | Coccolithus pelagicus ssp. floralis | C. pelagicus ssp. floralis | # | Pospichal, James J | Counting, light microscope | |
| 63 | Cyclicargolithus cf. floridanus | C. cf. floridanus | # | Pospichal, James J | Counting, light microscope | |
| 64 | Discoaster deflandrei | D. deflandrei | # | Pospichal, James J | Counting, light microscope | |
| 65 | Coccolithus miopelagicus | C. miopelagicus | # | Pospichal, James J | Counting, light microscope | |
| 66 | Coccolithus pelagicus | C. pelagicus | # | Pospichal, James J | Counting, light microscope | 11-12 µm |
| 67 | Cyclicargolithus floridanus | C. floridanus | # | Pospichal, James J | Counting, light microscope | <6 µm |
| 68 | Reticulofenestra cf. pseudoumbilica | R. cf. pseudoumbilica | # | Pospichal, James J | Counting, light microscope | |
| 69 | Sphenolithus cf. grandis | S. cf. grandis | # | Pospichal, James J | Counting, light microscope | |
| 70 | Sphenolithus cf. dissimilis | S. cf. dissimilis | # | Pospichal, James J | Counting, light microscope | |
| 71 | Discoaster cf. calculosus | D. cf. calculosus | # | Pospichal, James J | Counting, light microscope | |
| 72 | Discoaster cf. deflandrei | D. cf. deflandrei | # | Pospichal, James J | Counting, light microscope | |
| 73 | Discoaster deflandrei | D. deflandrei | # | Pospichal, James J | Counting, light microscope | stellate knob |
| 74 | Reticulofenestra cf. ampliumbilicus | R. cf. ampliumbilicus | # | Pospichal, James J | Counting, light microscope | |
| 75 | Cyclicargolithus abisectus | C. abisectus | # | Pospichal, James J | Counting, light microscope | <10 µm |
| 76 | Helicosphaera spp. | Helicosphaera spp. | # | Pospichal, James J | Counting, light microscope | |
| 77 | Helicosphaera aff. euphratis | H. aff. euphratis | # | Pospichal, James J | Counting, light microscope | |
| 78 | Umbilicosphaera jafari | U. jafari | # | Pospichal, James J | Counting, light microscope | |
| 79 | Nannofossils, reworked fossil | Nannos rew fossil | # | Pospichal, James J | Counting, light microscope | Cretaceous |
| 80 | Chiasmolithus spp. | Chiasmolithus spp. | # | Pospichal, James J | Counting, light microscope | reworked |
| 81 | Reticulofenestra bisecta | R. bisecta | # | Pospichal, James J | Counting, light microscope | >10 µm; reworked |
| 82 | Reticulofenestra samodurovii | R. samodurovii | # | Pospichal, James J | Counting, light microscope | reworked |
| 83 | Reticulofenestra umbilicus | R. umbilicus | # | Pospichal, James J | Counting, light microscope | reworked |
| 84 | Sample comment | Sample comment | Pospichal, James J | Counting, light microscope |
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