Hallenberger, Maximilian; Reuning, Lars; Back, Stefan; Gallagher, Stephen John; Iwatani, Hokuto; Lindhorst, Katja: Porosity analysis from IODP Site 356-U1461. PANGAEA, https://doi.pangaea.de/10.1594/PANGAEA.927015 (dataset in review)
Abstract:
The North West Shelf of Australia is an extensive tropical carbonate ramp and forms an important template for the interpretation of similar systems in the sedimentary record. Yet, little is known about the development of the distally steepened ramp from the middle to late Quaternary, a period of high frequency glacioeustatic changes in sea level and climate. This research describes core and seismic-reflection data from a mid- to outer ramp transect at the Northwest Shelf. Porosity data is used to assess the effect of facies related porosity changes onto the creation of seismic reflections. Generally, porosity values are high (~60%) where sediments are composed of fine-grained aragonite needle mud whereas bioclastic or non-skeletal grain rich sediments display lower porosities (40-50%). In effect, strong acoustic impedance contrasts are observed wherever facies changes into fine-grained aragonite mud. This agrees with observations in seismic, which reveal the occurrence of strong seismic reflections wherever larger facies changes occur.
Keyword(s):
Related to:
Hallenberger, Maximilian; Reuning, Lars; Back, Stefan; Gallagher, Stephen John; Iwatani, Hokuto; Lindhorst, Katja: Abundance of non-skeletal grains from IODP Site 356-U1461. PANGAEA, https://doi.pangaea.de/10.1594/PANGAEA.927008
Hallenberger, Maximilian; Reuning, Lars; Back, Stefan; Gallagher, Stephen John; Iwatani, Hokuto; Lindhorst, Katja: Bulk density from IODP Site 356-U1461. PANGAEA, https://doi.pangaea.de/10.1594/PANGAEA.927012
Hallenberger, Maximilian; Reuning, Lars; Back, Stefan; Gallagher, Stephen John; Iwatani, Hokuto; Lindhorst, Katja (submitted): Internal Architecture of a carbonate ramp exposed to high amplitude sea-level fluctuations: Evidence from the NW shelf of Australia. Sedimentology
Hallenberger, Maximilian; Reuning, Lars; Back, Stefan; Gallagher, Stephen John; Iwatani, Hokuto; Lindhorst, Katja: Lightness measurement from IODP Site 356-U1461. PANGAEA, https://doi.pangaea.de/10.1594/PANGAEA.927013
Hallenberger, Maximilian; Reuning, Lars; Back, Stefan; Gallagher, Stephen John; Iwatani, Hokuto; Lindhorst, Katja: Mineral determination from IODP Site 356-U1461. PANGAEA, https://doi.pangaea.de/10.1594/PANGAEA.927014
Hallenberger, Maximilian; Reuning, Lars; Back, Stefan; Gallagher, Stephen John; Iwatani, Hokuto; Lindhorst, Katja: P-wave velocity measurement from IODP Site 356-U1461. PANGAEA, https://doi.pangaea.de/10.1594/PANGAEA.927017
Hallenberger, Maximilian; Reuning, Lars; Back, Stefan; Gallagher, Stephen John; Iwatani, Hokuto; Lindhorst, Katja: XRF measurement from IODP Site 356-U1461. PANGAEA, https://doi.pangaea.de/10.1594/PANGAEA.927018
Project(s):
Coverage:
Median Latitude: -20.214215 * Median Longitude: 115.065705 * South-bound Latitude: -20.214400 * West-bound Longitude: 115.065615 * North-bound Latitude: -20.214045 * East-bound Longitude: 115.065800
Date/Time Start: 2015-08-17T18:25:00 * Date/Time End: 2015-11-20T09:40:00
Minimum DEPTH, sediment/rock: 0.71 m * Maximum DEPTH, sediment/rock: 77.11 m
Event(s):
356-U1461A * Latitude: -20.214400 * Longitude: 115.065800 * Date/Time: 2015-08-17T18:25:00 * Elevation: -127.2 m * Penetration: 284.70 m * Recovery: 287.59 m * Campaign: EXP356 * Basis: Joides Resolution * Method/Device: Half-length advanced piston corer (HLAPC)
356-U1461B * Latitude: -20.214200 * Longitude: 115.065700 * Date/Time: 2015-08-18T16:00:00 * Penetration: 879.20 m * Recovery: 743.24 m * Campaign: EXP356 * Basis: Joides Resolution * Method/Device: Autoclave piston corer (APC)
356-U1461C * Latitude: -20.214045 * Longitude: 115.065615 * Date/Time: 2015-11-20T09:40:00 * Elevation: -264.2 m * Penetration: 443.90 m * Recovery: 448.53 m * Campaign: EXP356 * Basis: Joides Resolution * Method/Device: Rotary core drilling (RCD)
Comment:
Porosity was determined on discrete samples on shipboard during Expedition 356. Selected samples where saturated with seawater and subsequently tried to determine wet and dry weight and volume. Based on these parameters porosity was calculated.
Parameter(s):
# | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
---|---|---|---|---|---|---|
1 | Event label | Event | Hallenberger, Maximilian | |||
2 | Latitude of event | Latitude | Hallenberger, Maximilian | |||
3 | Longitude of event | Longitude | Hallenberger, Maximilian | |||
4 | Date/Time of event | Date/Time | Hallenberger, Maximilian | |||
5 | DEPTH, sediment/rock | Depth sed | m | Hallenberger, Maximilian | Geocode – Depth CSF-A (m) | |
6 | DEPTH, sediment/rock | Depth sed | m | Hallenberger, Maximilian | Geocode – Depth CCSF-A (m) | |
7 | Porosity | Poros | % vol | Hallenberger, Maximilian | Calculated |
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0) (License comes into effect after moratorium ends)
Size:
42 data points