(Table 1) Bulk and grain density, porosity, and p- and s-wave velocity characteristics of ODP Hole 163-990A sediments
Seismic velocities in rocks are influenced by the properties of the solid, the pore fluid, and the pore space. Cracks dramatically affect seismic velocities in rocks; their influence on the effective elastic moduli of rocks depends on their shape and concentration. Thin cracks (or fractures) substan...
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.804640 2024-09-15T18:09:39+00:00 (Table 1) Bulk and grain density, porosity, and p- and s-wave velocity characteristics of ODP Hole 163-990A sediments Cerney, Brian Carlson, Richard L LATITUDE: 63.472800 * LONGITUDE: -39.780000 * DATE/TIME START: 1995-09-20T17:45:00 * DATE/TIME END: 1995-10-01T13:00:00 * MINIMUM ELEVATION: -541.5 m * MAXIMUM ELEVATION: -541.5 m 1999 text/tab-separated-values, 770 data points https://doi.pangaea.de/10.1594/PANGAEA.804640 https://doi.org/10.1594/PANGAEA.804640 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.804640 https://doi.org/10.1594/PANGAEA.804640 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess Supplement to: Cerney, Brian; Carlson, Richard L (1999): The effect of cracks on the seismic velocities of basalt from Site 990, Southeast Greenland margin. In: Larsen, HC; Duncan, RA; Allan, JF; Brooks, K (eds.) Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 163, 1-7, https://doi.org/10.2973/odp.proc.sr.163.106.1999 163-990A Calculated from mass/volume Density grain wet bulk DRILL Drilling/drill rig DSDP/ODP/IODP sample designation Greenland Sea Joides Resolution Leg163 Ocean Drilling Program ODP Porosity Pressure stress Sample code/label Velocity compressional wave shear wave dataset 1999 ftpangaea https://doi.org/10.1594/PANGAEA.80464010.2973/odp.proc.sr.163.106.1999 2024-07-24T02:31:32Z Seismic velocities in rocks are influenced by the properties of the solid, the pore fluid, and the pore space. Cracks dramatically affect seismic velocities in rocks; their influence on the effective elastic moduli of rocks depends on their shape and concentration. Thin cracks (or fractures) substantially lower the moduli of a rock relative to the effect of spherical voids (or vesicles), and lower moduli are reflected by lower P- and S-wave velocities. The objective of this research is to determine the types and concentrations of cracks and their influence on the seismic properties of subaerially erupted basalts drilled from Hole 990A on the Southeast Greenland margin during Ocean Drilling Program Leg 163. Ellipsoidal cracks are used to model the voids in the rocks. The elastic moduli of the solid (grains) are also free parameters in the inverse modeling procedure. The apparent grain moduli reflect a weighted average of the moduli of the constituent minerals (e.g., plagioclase, augite, and clay minerals). The results indicate that (1) there is a strong relationship between P-wave velocity and porosity, suggesting a similarity of pore shape distributions, (2) the distribution of crack types within the massive, central region of aa flows from Hole 990A is independent of total porosity, (3) thin cracks are the first to be effectively sealed by alteration products, and (4) grain densities (an alteration index) and apparent grain moduli of the basalt samples are directly related. Dataset Greenland Greenland Sea PANGAEA - Data Publisher for Earth & Environmental Science ENVELOPE(-39.780000,-39.780000,63.472800,63.472800) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
163-990A Calculated from mass/volume Density grain wet bulk DRILL Drilling/drill rig DSDP/ODP/IODP sample designation Greenland Sea Joides Resolution Leg163 Ocean Drilling Program ODP Porosity Pressure stress Sample code/label Velocity compressional wave shear wave |
spellingShingle |
163-990A Calculated from mass/volume Density grain wet bulk DRILL Drilling/drill rig DSDP/ODP/IODP sample designation Greenland Sea Joides Resolution Leg163 Ocean Drilling Program ODP Porosity Pressure stress Sample code/label Velocity compressional wave shear wave Cerney, Brian Carlson, Richard L (Table 1) Bulk and grain density, porosity, and p- and s-wave velocity characteristics of ODP Hole 163-990A sediments |
topic_facet |
163-990A Calculated from mass/volume Density grain wet bulk DRILL Drilling/drill rig DSDP/ODP/IODP sample designation Greenland Sea Joides Resolution Leg163 Ocean Drilling Program ODP Porosity Pressure stress Sample code/label Velocity compressional wave shear wave |
description |
Seismic velocities in rocks are influenced by the properties of the solid, the pore fluid, and the pore space. Cracks dramatically affect seismic velocities in rocks; their influence on the effective elastic moduli of rocks depends on their shape and concentration. Thin cracks (or fractures) substantially lower the moduli of a rock relative to the effect of spherical voids (or vesicles), and lower moduli are reflected by lower P- and S-wave velocities. The objective of this research is to determine the types and concentrations of cracks and their influence on the seismic properties of subaerially erupted basalts drilled from Hole 990A on the Southeast Greenland margin during Ocean Drilling Program Leg 163. Ellipsoidal cracks are used to model the voids in the rocks. The elastic moduli of the solid (grains) are also free parameters in the inverse modeling procedure. The apparent grain moduli reflect a weighted average of the moduli of the constituent minerals (e.g., plagioclase, augite, and clay minerals). The results indicate that (1) there is a strong relationship between P-wave velocity and porosity, suggesting a similarity of pore shape distributions, (2) the distribution of crack types within the massive, central region of aa flows from Hole 990A is independent of total porosity, (3) thin cracks are the first to be effectively sealed by alteration products, and (4) grain densities (an alteration index) and apparent grain moduli of the basalt samples are directly related. |
format |
Dataset |
author |
Cerney, Brian Carlson, Richard L |
author_facet |
Cerney, Brian Carlson, Richard L |
author_sort |
Cerney, Brian |
title |
(Table 1) Bulk and grain density, porosity, and p- and s-wave velocity characteristics of ODP Hole 163-990A sediments |
title_short |
(Table 1) Bulk and grain density, porosity, and p- and s-wave velocity characteristics of ODP Hole 163-990A sediments |
title_full |
(Table 1) Bulk and grain density, porosity, and p- and s-wave velocity characteristics of ODP Hole 163-990A sediments |
title_fullStr |
(Table 1) Bulk and grain density, porosity, and p- and s-wave velocity characteristics of ODP Hole 163-990A sediments |
title_full_unstemmed |
(Table 1) Bulk and grain density, porosity, and p- and s-wave velocity characteristics of ODP Hole 163-990A sediments |
title_sort |
(table 1) bulk and grain density, porosity, and p- and s-wave velocity characteristics of odp hole 163-990a sediments |
publisher |
PANGAEA |
publishDate |
1999 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.804640 https://doi.org/10.1594/PANGAEA.804640 |
op_coverage |
LATITUDE: 63.472800 * LONGITUDE: -39.780000 * DATE/TIME START: 1995-09-20T17:45:00 * DATE/TIME END: 1995-10-01T13:00:00 * MINIMUM ELEVATION: -541.5 m * MAXIMUM ELEVATION: -541.5 m |
long_lat |
ENVELOPE(-39.780000,-39.780000,63.472800,63.472800) |
genre |
Greenland Greenland Sea |
genre_facet |
Greenland Greenland Sea |
op_source |
Supplement to: Cerney, Brian; Carlson, Richard L (1999): The effect of cracks on the seismic velocities of basalt from Site 990, Southeast Greenland margin. In: Larsen, HC; Duncan, RA; Allan, JF; Brooks, K (eds.) Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 163, 1-7, https://doi.org/10.2973/odp.proc.sr.163.106.1999 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.804640 https://doi.org/10.1594/PANGAEA.804640 |
op_rights |
CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1594/PANGAEA.80464010.2973/odp.proc.sr.163.106.1999 |
_version_ |
1810447225304645632 |