Abnormal fluid pressures and fault-zone dilation in the Barbados accretionary prism: Evidence from logging while drilling

Abstract

Research Article| July 01, 1995 Abnormal fluid pressures and fault-zone dilation in the Barbados accretionary prism: Evidence from logging while drilling J. C. Moore; J. C. Moore 1Earth Sciences, University of California, Santa Cruz, California 95064 Search for other works by this author on: GSW Google Scholar T. H. Shipley; T. H. Shipley 2Institute for Geophysics, University of Texas, Austin, Texas 78759 Search for other works by this author on: GSW Google Scholar D. Goldberg; D. Goldberg 3Lamont-Doherty Earth Observatory, Palisades, New York 10964 Search for other works by this author on: GSW Google Scholar Y. Ogawa; Y. Ogawa 4Institute of Geoscience, University of Tsukuba, Tsukuba, Japan Search for other works by this author on: GSW Google Scholar F. Filice; F. Filice 3Lamont-Doherty Earth Observatory, Palisades, New York 10964 Search for other works by this author on: GSW Google Scholar A. Fisher; A. Fisher 5Department of Geological Sciences and Indiana Geological Survey, Indiana University, Bloomington, Indiana 47405 Search for other works by this author on: GSW Google Scholar M.-J. Jurado; M.-J. Jurado 6Institute of Earth Sciences, Barcelona, Spain Search for other works by this author on: GSW Google Scholar G. F. Moore; G. F. Moore 7Department of Geology and Geophysics, University of Hawaii, Honolulu, Hawaii 96822 Search for other works by this author on: GSW Google Scholar A. Rabaute; A. Rabaute 8Laboratory of Isotopic Geochemistry, University of Montpellier II, Montpellier, France Search for other works by this author on: GSW Google Scholar H. Yin; H. Yin 3Lamont-Doherty Earth Observatory, Palisades, New York 10964 Search for other works by this author on: GSW Google Scholar G. Zwart; G. Zwart 1Earth Sciences, University of California, Santa Cruz, California 95064 Search for other works by this author on: GSW Google Scholar W. Brückmann; W. Brückmann 9Research Center for Marine Geosciences, Kiel, Germany Search for other works by this author on: GSW Google Scholar P. Henry; P. Henry 10Laboratory of Geology, Ecole Normale Supérieure, Paris, France Search for other works by this author on: GSW Google Scholar J. Ashi; J. Ashi 11Institute of Geology, University of Tokyo, Tokyo, Japan Search for other works by this author on: GSW Google Scholar P. Blum; P. Blum 12Ocean Drilling Program, College Station, Texas 77843 Search for other works by this author on: GSW Google Scholar A. Meyer; A. Meyer 13Woods Hole Oceanographic Institution, Woods Hole, Massachusetts 02543 Search for other works by this author on: GSW Google Scholar B. Housen; B. Housen 14Institute of Rock Magnetism, University of Minnesota, Minneapolis, Minnesota 55455 Search for other works by this author on: GSW Google Scholar M. Kastner; M. Kastner 15Scripps Institution of Oceanography, University of California, San Diego, La Jolla, California 92093 Search for other works by this author on: GSW Google Scholar P. Labaume; P. Labaume 16Geofluids, Basins, Water, University of Montpellier II, Montpellier, France Search for other works by this author on: GSW Google Scholar T. Laier; T. Laier 17Geological Survey of Denmark, Copenhagen, Denmark Search for other works by this author on: GSW Google Scholar E. C. Leitch; E. C. Leitch 18Department of Applied Geology, University of Technology, Sydney, Australia Search for other works by this author on: GSW Google Scholar A. J. Maltman; A. J. Maltman 19Institute of Earth Studies, University of Wales, Aberystwyth, United Kingdom Search for other works by this author on: GSW Google Scholar S. Peacock; S. Peacock 20School of Earth Sciences, University of Birmingham, Birmingham, United Kingdom Search for other works by this author on: GSW Google Scholar T. H. Steiger; T. H. Steiger 21Institute for Paleontology and History of Geology, Munich, Germany Search for other works by this author on: GSW Google Scholar H. J. Tobin; H. J. Tobin 22Department of Earth Sciences, University of California, Santa Cruz, California 95064 Search for other works by this author on: GSW Google Scholar M. B. Underwood; M. B. Underwood 23Department of Geological Sciences, University of Missouri, Columbia, Missouri 65211 Search for other works by this author on: GSW Google Scholar Y. Xu; Y. Xu 24Department of Geology, Florida State University, Tallahassee, Florida 32306 Search for other works by this author on: GSW Google Scholar Y. Zheng Y. Zheng 5Department of Geological Sciences and Indiana Geological Survey, Indiana University, Bloomington, Indiana 47405 Search for other works by this author on: GSW Google Scholar Author and Article Information J. C. Moore 1Earth Sciences, University of California, Santa Cruz, California 95064 T. H. Shipley 2Institute for Geophysics, University of Texas, Austin, Texas 78759 D. Goldberg 3Lamont-Doherty Earth Observatory, Palisades, New York 10964 Y. Ogawa 4Institute of Geoscience, University of Tsukuba, Tsukuba, Japan F. Filice 3Lamont-Doherty Earth Observatory, Palisades, New York 10964 A. Fisher 5Department of Geological Sciences and Indiana Geological Survey, Indiana University, Bloomington, Indiana 47405 M.-J. Jurado 6Institute of Earth Sciences, Barcelona, Spain G. F. Moore 7Department of Geology and Geophysics, University of Hawaii, Honolulu, Hawaii 96822 A. Rabaute 8Laboratory of Isotopic Geochemistry, University of Montpellier II, Montpellier, France H. Yin 3Lamont-Doherty Earth Observatory, Palisades, New York 10964 G. Zwart 1Earth Sciences, University of California, Santa Cruz, California 95064 W. Brückmann 9Research Center for Marine Geosciences, Kiel, Germany P. Henry 10Laboratory of Geology, Ecole Normale Supérieure, Paris, France J. Ashi 11Institute of Geology, University of Tokyo, Tokyo, Japan P. Blum 12Ocean Drilling Program, College Station, Texas 77843 A. Meyer 13Woods Hole Oceanographic Institution, Woods Hole, Massachusetts 02543 B. Housen 14Institute of Rock Magnetism, University of Minnesota, Minneapolis, Minnesota 55455 M. Kastner 15Scripps Institution of Oceanography, University of California, San Diego, La Jolla, California 92093 P. Labaume 16Geofluids, Basins, Water, University of Montpellier II, Montpellier, France T. Laier 17Geological Survey of Denmark, Copenhagen, Denmark E. C. Leitch 18Department of Applied Geology, University of Technology, Sydney, Australia A. J. Maltman 19Institute of Earth Studies, University of Wales, Aberystwyth, United Kingdom S. Peacock 20School of Earth Sciences, University of Birmingham, Birmingham, United Kingdom T. H. Steiger 21Institute for Paleontology and History of Geology, Munich, Germany H. J. Tobin 22Department of Earth Sciences, University of California, Santa Cruz, California 95064 M. B. Underwood 23Department of Geological Sciences, University of Missouri, Columbia, Missouri 65211 Y. Xu 24Department of Geology, Florida State University, Tallahassee, Florida 32306 Y. Zheng 5Department of Geological Sciences and Indiana Geological Survey, Indiana University, Bloomington, Indiana 47405 Publisher: Geological Society of America First Online: 02 Jun 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 Geological Society of America Geology (1995) 23 (7): 605–608. https://doi.org/10.1130/0091-7613(1995)023<0605:AFPAFZ>2.3.CO;2 Article history First Online: 02 Jun 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation J. C. Moore, T. H. Shipley, D. Goldberg, Y. Ogawa, F. Filice, A. Fisher, M.-J. Jurado, G. F. Moore, A. Rabaute, H. Yin, G. Zwart, W. Brückmann, P. Henry, J. Ashi, P. Blum, A. Meyer, B. Housen, M. Kastner, P. Labaume, T. Laier, E. C. Leitch, A. J. Maltman, S. Peacock, T. H. Steiger, H. J. Tobin, M. B. Underwood, Y. Xu, Y. Zheng; Abnormal fluid pressures and fault-zone dilation in the Barbados accretionary prism: Evidence from logging while drilling. Geology 1995;; 23 (7): 605–608. doi: https://doi.org/10.1130/0091-7613(1995)023<0605:AFPAFZ>2.3.CO;2 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyGeology Search Advanced Search Abstract Logs collected while drilling measured density in situ, through the accretionary prism and decollement zone of the northern Barbados Ridge. Consolidation tests relate void ratio (derived from density) to effective stress and predict a fluid pressure profile, assuming that the upper 100 m of the prism is at a hydrostatic pressure gradient. The calculated fluid pressure curve rises to >90% of lithostatic below thrusts in the prism, presumably due to the increase in overburden and lateral tectonic loading. Thin (0.5–2.0 m) intervals of anomalously low density and resistivity in the logs through the basal decollement zone suggest dilation and perhaps hydrofracturing. A peak in hydraulic head in the upper half of the decollement zone requires lateral influx of fluid, a conclusion consistent with previous geochemical studies. Although the calculated fluid-pressure profile is model dependent, its inherent character ties to major structural features. This content is PDF only. Please click on the PDF icon to access. 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