Ruchi; Henehan, Michael J; Frings, Patrick J; Laub, Ollie; Penman, Donald E; Frick, Daniel A; Blanckenburg, Friedhelm von: Silicon isotope records of spumellarians and nasellarians radiolarians across the Middle Eocene Climatic Optimum (MECO) from IODP Site 371-U1511 and ODP Site 207-1260 [dataset]. PANGAEA, https://doi.pangaea.de/10.1594/PANGAEA.993680 (dataset in review)
Abstract:
This dataset comprises stable silicon isotope measurements of radiolarian tests obtained using MC-ICP-MS (mass spectrometer, Thermo scientific, Neptune). Radiolarians were separated from sediments broadly following standard techniques. Sediment samples were repeatedly washed with deionized water over a 63 µm sieve. After drying at 50 ˚C, radiolarians were handpicked from the >63 µm size fraction. Siliceous microfossils were subsequently cleaned to remove clays and organic matter, digested, and subjected to column chromotography for silicon purification prior to isotopic analysis. This dataset evaluates isotopic variability among spumellarian morphotypes (1, 2, and 3; the first morphotype is distinguished by smooth edges and finer pores, the second by protruding spines and third one by bigger pores with rough edges); across size fraction (<212 µm, 212-250 µm, 250-300 µm, and >300 µm) of tests obtained from spumellarian morphotypes and compares spumellarians with nassellarians at sites IODP 371-U1511 and ODP 207-1260. IODP Site 371-U1511 (South Pacific) was drilled on the Tasman abyssal plain, ODP Site 171-1260 (Western Equatorial Atlantic) is located at the Northwest margin of Demerara Rise.
Supplement to:
Ruchi; Henehan, Michael J; Frings, Patrick J; Laub, Ollie; Penman, Donald E; Frick, Daniel A; Blanckenburg, Friedhelm von (in prep.): Constraints on silicate weathering and ocean circulation during the MECO from silicon isotopes.
Funding:
Coverage:
Median Latitude: -14.147647 * Median Longitude: 52.885876 * South-bound Latitude: -37.561093 * West-bound Longitude: -54.543880 * North-bound Latitude: 9.265800 * East-bound Longitude: 160.315632
Date/Time Start: 2003-02-07T04:30:00 * Date/Time End: 2003-02-09T07:35:00
Minimum DEPTH, sediment/rock: 20.000 m * Maximum DEPTH, sediment/rock: 267.505 m
Event(s):
207-1260A * Latitude: 9.265800 * Longitude: -54.543880 * Date/Time Start: 2003-02-07T04:30:00 * Date/Time End: 2003-02-09T07:35:00 * Elevation: -2548.8 m * Penetration: 491.9 m * Recovery: 391.6 m * Location: North Atlantic Ocean * Campaign: Leg207 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 54 cores; 491.9 m cored; 0 m drilled; 79.6 % recovery
371-U1511B * Latitude: -37.561093 * Longitude: 160.315632 * Elevation: -4846.6 m * Campaign: Exp371 (Tasman Frontier Subduction Initiation and Paleogene Climate) * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL)
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Event label | Event | Ruchi | |||
| 2 | Latitude of event | Latitude | Ruchi | |||
| 3 | Longitude of event | Longitude | Ruchi | |||
| 4 | Sample code/label | Sample label | Ruchi | DSDP/ODP/IODP sample designation | ||
| 5 | DEPTH, sediment/rock | Depth sed | m | Ruchi | IODP Depth Scale Terminology | Geocode – MBSF-TOP |
| 6 | Age | Age | Ma | Ruchi | ||
| 7 | Morphotype | Morphotype | # | Ruchi | ||
| 8 | Size fraction | Size fraction | Ruchi | |||
| 9 | Order, unique identification | Order UID | Ruchi | Reference in WoRMS (WoRMS) | ||
| 10 | Order, unique identification (Semantic URI) | Order UID (Semantic URI) | Ruchi | Reference in WoRMS (WoRMS) | ||
| 11 | Order, unique identification (URI) | Order UID (URI) | Ruchi | Reference in WoRMS (WoRMS) | ||
| 12 | Proxy | Proxy | Ruchi | |||
| 13 | δ30Si | δ30Si | ‰ NBS | Ruchi | Multicollector inductively coupled plasma mass spectrometer (MC-ICP-MS), ThermoFisher Scientific, Neptune XT | |
| 14 | δ30Si, standard deviation | δ30Si std dev | ± | Ruchi | Multicollector inductively coupled plasma mass spectrometer (MC-ICP-MS), ThermoFisher Scientific, Neptune XT | |
| 15 | δ29Si | δ29Si | ‰ | Ruchi | Multicollector inductively coupled plasma mass spectrometer (MC-ICP-MS), ThermoFisher Scientific, Neptune XT | |
| 16 | δ29Si, standard deviation | δ29Si std dev | ± | Ruchi | Multicollector inductively coupled plasma mass spectrometer (MC-ICP-MS), ThermoFisher Scientific, Neptune XT |
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0) (License comes into effect after moratorium ends)
Status:
Curation Level: Enhanced curation (CurationLevelC)
Size:
627 data points