Macroturbidites of ODP Hole 103-641C
Barremian through uppermost Aptian strata from ODP Hole 641C, located upslope of a tilted fault block on the Galicia margin (northwest Spain), are syn-rift sediments deposited in the bathyal realm and are characterized by rapid sedimentation from turbidity currents and debris flows. Calcarenite and...
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1988
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Online Access: | https://doi.pangaea.de/10.1594/PANGAEA.743869 https://doi.org/10.1594/PANGAEA.743869 |
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.743869 2024-09-15T18:24:12+00:00 Macroturbidites of ODP Hole 103-641C Haggerty, Janet A Germann, Scott H LATITUDE: 42.155000 * LONGITUDE: -12.181700 * DATE/TIME START: 1985-06-11T10:45:00 * DATE/TIME END: 1985-06-15T13:30:00 1988 application/zip, 3 datasets https://doi.pangaea.de/10.1594/PANGAEA.743869 https://doi.org/10.1594/PANGAEA.743869 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.743869 https://doi.org/10.1594/PANGAEA.743869 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess Supplement to: Haggerty, Janet A; Germann, Scott H (1988): Resedimentation and diagenesis, including silicification, of Barremian-Aptian shallow-water carbonates from the Galicia Margin, Eastern North Atlantic, at Ocean Drilling Program Site 641. In: Boillot, G; Winterer, EL; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 103, 513-530, https://doi.org/10.2973/odp.proc.sr.103.128.1988 103-641C DRILL Drilling/drill rig Joides Resolution Leg103 North Atlantic Ocean Ocean Drilling Program ODP dataset publication series 1988 ftpangaea https://doi.org/10.1594/PANGAEA.74386910.2973/odp.proc.sr.103.128.1988 2024-08-21T00:02:25Z Barremian through uppermost Aptian strata from ODP Hole 641C, located upslope of a tilted fault block on the Galicia margin (northwest Spain), are syn-rift sediments deposited in the bathyal realm and are characterized by rapid sedimentation from turbidity currents and debris flows. Calcarenite and calcirudite turbidites contain shallow-water carbonate, terrigenous, and pelagic debris, in complete or partial Bouma sequences. These deposits contain abraded micritized bioclasts of reefal debris, including rudist fragments. The youngest turbidite containing shallow-water carbonate debris at Site 641 defines the boundary between syn-rift and post-rift sediments; this is also the boundary between Aptian and Albian sediments. Some Aptian turbidites are partially silicified, with pore-filling chalcedony and megaquartz. Adjacent layers of length-fast and -slow chalcedony are succeeded by megaquartz as the final pore-filling stage within carbonate reef debris. Temperatures of formation, calculated from the oxygen isotopic composition of the authigenic quartz, are relatively low for formation of quartz but are relatively warm for shallow burial depths. This quartz cement may be interpreted as a rift-associated precipitate from seawater-derived epithermal fluids that migrated along a fault associated with the tilted block and were injected into the porous turbidite beds. These warm fluids may have cooled rapidly and precipitated silica at the boundaries of the turbidite beds as a result of contact with cooler pore waters. The color pattern in the quartz cement, observed by cathodoluminescence and fluorescence techniques, and changes in the trace lement geochemistry mimic the textural change of the different quartz layers and indicates growth synchronism of the different quartz phases. Fluorescence petrography of neomorphosed low-Mg-calcite bioclasts in the silicified turbidites shows extensive zonation and details of replacive crystal growth in the bioclasts that are not observed by cathodoluminescence. Fluorescence ... Other/Unknown Material North Atlantic PANGAEA - Data Publisher for Earth & Environmental Science ENVELOPE(-12.181700,-12.181700,42.155000,42.155000) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
103-641C DRILL Drilling/drill rig Joides Resolution Leg103 North Atlantic Ocean Ocean Drilling Program ODP |
spellingShingle |
103-641C DRILL Drilling/drill rig Joides Resolution Leg103 North Atlantic Ocean Ocean Drilling Program ODP Haggerty, Janet A Germann, Scott H Macroturbidites of ODP Hole 103-641C |
topic_facet |
103-641C DRILL Drilling/drill rig Joides Resolution Leg103 North Atlantic Ocean Ocean Drilling Program ODP |
description |
Barremian through uppermost Aptian strata from ODP Hole 641C, located upslope of a tilted fault block on the Galicia margin (northwest Spain), are syn-rift sediments deposited in the bathyal realm and are characterized by rapid sedimentation from turbidity currents and debris flows. Calcarenite and calcirudite turbidites contain shallow-water carbonate, terrigenous, and pelagic debris, in complete or partial Bouma sequences. These deposits contain abraded micritized bioclasts of reefal debris, including rudist fragments. The youngest turbidite containing shallow-water carbonate debris at Site 641 defines the boundary between syn-rift and post-rift sediments; this is also the boundary between Aptian and Albian sediments. Some Aptian turbidites are partially silicified, with pore-filling chalcedony and megaquartz. Adjacent layers of length-fast and -slow chalcedony are succeeded by megaquartz as the final pore-filling stage within carbonate reef debris. Temperatures of formation, calculated from the oxygen isotopic composition of the authigenic quartz, are relatively low for formation of quartz but are relatively warm for shallow burial depths. This quartz cement may be interpreted as a rift-associated precipitate from seawater-derived epithermal fluids that migrated along a fault associated with the tilted block and were injected into the porous turbidite beds. These warm fluids may have cooled rapidly and precipitated silica at the boundaries of the turbidite beds as a result of contact with cooler pore waters. The color pattern in the quartz cement, observed by cathodoluminescence and fluorescence techniques, and changes in the trace lement geochemistry mimic the textural change of the different quartz layers and indicates growth synchronism of the different quartz phases. Fluorescence petrography of neomorphosed low-Mg-calcite bioclasts in the silicified turbidites shows extensive zonation and details of replacive crystal growth in the bioclasts that are not observed by cathodoluminescence. Fluorescence ... |
format |
Other/Unknown Material |
author |
Haggerty, Janet A Germann, Scott H |
author_facet |
Haggerty, Janet A Germann, Scott H |
author_sort |
Haggerty, Janet A |
title |
Macroturbidites of ODP Hole 103-641C |
title_short |
Macroturbidites of ODP Hole 103-641C |
title_full |
Macroturbidites of ODP Hole 103-641C |
title_fullStr |
Macroturbidites of ODP Hole 103-641C |
title_full_unstemmed |
Macroturbidites of ODP Hole 103-641C |
title_sort |
macroturbidites of odp hole 103-641c |
publisher |
PANGAEA |
publishDate |
1988 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.743869 https://doi.org/10.1594/PANGAEA.743869 |
op_coverage |
LATITUDE: 42.155000 * LONGITUDE: -12.181700 * DATE/TIME START: 1985-06-11T10:45:00 * DATE/TIME END: 1985-06-15T13:30:00 |
long_lat |
ENVELOPE(-12.181700,-12.181700,42.155000,42.155000) |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
Supplement to: Haggerty, Janet A; Germann, Scott H (1988): Resedimentation and diagenesis, including silicification, of Barremian-Aptian shallow-water carbonates from the Galicia Margin, Eastern North Atlantic, at Ocean Drilling Program Site 641. In: Boillot, G; Winterer, EL; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 103, 513-530, https://doi.org/10.2973/odp.proc.sr.103.128.1988 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.743869 https://doi.org/10.1594/PANGAEA.743869 |
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.74386910.2973/odp.proc.sr.103.128.1988 |
_version_ |
1810464522052304896 |