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Calcareous nannofossil abundance and datums of ODP Leg 189 sites

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posted on 22.11.2019 by S Audra Stant, Jonathan Lara, Kristeen L McGonigal, Bryan Ladner
Quaternary sediments were recovered at all five sites drilled during Ocean Drilling Program (ODP) Leg 189 in the Tasmanian Gateway. Two of these sites lie north of the present-day Subtropical Front (STF), and three sites lie south of the STF. Quaternary sediments recovered at Sites 1168, 1170, 1171, and 1172 were studied in detail to determine the calcareous nannofossil biostratigraphy and construct an age model for these sediments. The Pliocene/Pleistocene boundary was identified by the last occurrence (LO) of Discoaster brouweri at Site 1172 and approximated by the LO of Calcidiscus macintyrei at the other sites because of a lack of discoasterids. A hiatus encompassing the entire Helicosphaera sellii Zone was tentatively identified at Sites 1168 and 1172 by the coincident LOs of C. macintyrei and H. sellii. Similar hiatuses have been noted at ODP Site 1127 on the Great Australian Bight, Deep Sea Drilling Project Site 282 off the Tasman subcontinent, and ODP Site 1165 in Prydz Bay, Antarctica.

History

Year

2004

Size

5 datasets

Coverage

* Median Latitude: -45.3823710667 * Median Longitude: 147.338687733 * South-bound Latitude: -48.49995 * West-bound Longitude: 144.4127 * North-bound Latitude: -42.60968 * East-bound Longitude: 149.92835 * Date/Time Start: 2000-02-29T17:30:00 * Date/Time End: 2000-04-27T10:15:00

Event(s)

189-1168A * Latitude: -42.60968 * Longitude: 144.4127 * Date/Time Start: 2000-02-29T17:30:00 * Date/Time End: 2000-03-24T22:15:00 * Elevation: -2463.3 * Penetration: 883.5 m * Recovery: 836.85 m * Location: Indian Ocean * Campaign: Leg189 * Basis: Joides Resolution * Device: Drilling/drill rig (DRILL) * Comment: 95 cores; 883.5 m cored; 0 m drilled; 94.7 % recovery 189-1170A * Latitude: -47.15073 * Longitude: 146.0498 * Date/Time Start: 2000-03-31T08:30:00 * Date/Time End: 2000-04-03T05:45:00 * Elevation: -2704.7 * Penetration: 464.3 m * Recovery: 379.87 m * Location: Indian Ocean * Campaign: Leg189 * Basis: Joides Resolution * Device: Drilling/drill rig (DRILL) * Comment: 52 cores; 464.3 m cored; 0 m drilled; 81.8 % recovery 189-1171A * Latitude: -48.49993 * Longitude: 149.1115 * Date/Time Start: 2000-04-11T12:00:00 * Date/Time End: 2000-04-13T04:30:00 * Elevation: -2148.2 * Penetration: 124.4 m * Recovery: 117.52 m * Location: South Pacific Ocean * Campaign: Leg189 * Basis: Joides Resolution * Device: Drilling/drill rig (DRILL) * Comment: 14 cores; 124.4 m cored; 0 m drilled; 94.5 % recovery 189-1171C * Latitude: -48.49995 * Longitude: 149.11175 * Date/Time Start: 2000-04-13T15:45:00 * Date/Time End: 2000-04-14T21:00:00 * Elevation: -2147.8 * Penetration: 274.8 m * Recovery: 245.58 m * Location: South Pacific Ocean * Campaign: Leg189 * Basis: Joides Resolution * Device: Drilling/drill rig (DRILL) * Comment: 31 core; 274.8 m cored; 0 m drilled; 89.4 % recovery 189-1172A * Latitude: -43.95975 * Longitude: 149.92826 * Date/Time Start: 2000-04-22T06:45:00 * Date/Time End: 2000-04-26T09:30:00 * Elevation: -2621.9 * Penetration: 522.6 m * Recovery: 483.72 m * Location: Tasman Sea * Campaign: Leg189 * Basis: Joides Resolution * Device: Drilling/drill rig (DRILL) * Comment: 56 cores; 522.6 m cored; 0 m drilled; 92.6 % recovery 189-1172B * Latitude: -43.95958 * Longitude: 149.92835 * Date/Time Start: 2000-04-26T09:30:00 * Date/Time End: 2000-04-27T10:15:00 * Elevation: -2622.3 * Penetration: 202.4 m * Recovery: 206.7 m * Location: Tasman Sea * Campaign: Leg189 * Basis: Joides Resolution * Device: Drilling/drill rig (DRILL) * Comment: 22 cores; 202.4 m cored; 0 m drilled; 102.1 % recovery

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Ocean Drilling Program (ODP)

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