Porosity analysis from IODP Site 356-U1461
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| Autores principales: | , , , , , |
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| Formato: | Dataset Open Access |
| Lenguaje: | en |
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PANGAEA
2024
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| _version_ | 1867171872202817536 |
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| author | Hallenberger, Maximilian Reuning, Lars Back, Stefan Gallagher, Stephen John Iwatani, Hokuto Lindhorst, Katja |
| author_facet | Hallenberger, Maximilian Reuning, Lars Back, Stefan Gallagher, Stephen John Iwatani, Hokuto Lindhorst, Katja |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | 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. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_927015 |
| institution | PANGAEA |
| language | en |
| publishDate | 2024 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | Porosity analysis from IODP Site 356-U1461 Hallenberger, Maximilian Reuning, Lars Back, Stefan Gallagher, Stephen John Iwatani, Hokuto Lindhorst, Katja 356-U1461A; 356-U1461B; 356-U1461C; APC; Aragonite-needle mud; Australian Shelf; Autoclave piston corer; Calculated; Date/Time of event; DEPTH, sediment/rock; Distally steepened ramp; Event label; Exp356; Half-length advanced piston corer; HLAPC; Integrated Ocean Drilling Program / International Ocean Discovery Program; IODP; Joides Resolution; Latitude of event; Longitude of event; Lowstand shedding; NWS; Ooids; Porosity; RCD; Rotary core drilling 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. |
| title | Porosity analysis from IODP Site 356-U1461 |
| topic | 356-U1461A; 356-U1461B; 356-U1461C; APC; Aragonite-needle mud; Australian Shelf; Autoclave piston corer; Calculated; Date/Time of event; DEPTH, sediment/rock; Distally steepened ramp; Event label; Exp356; Half-length advanced piston corer; HLAPC; Integrated Ocean Drilling Program / International Ocean Discovery Program; IODP; Joides Resolution; Latitude of event; Longitude of event; Lowstand shedding; NWS; Ooids; Porosity; RCD; Rotary core drilling |
| url | https://doi.org/10.1594/PANGAEA.927015 |