Goldberg David Broglia Christina chris@ldeo.columbia.edu Becker Keir 1991 Tabulated depth, azimuth, and plunge (dip) of fracture dip vectors measured in ODP Hole 118-735B dataset https://doi.org/10.1594/PANGAEA.757714 Goldberg David Broglia Christina chris@ldeo.columbia.edu Becker Keir 1991 Fracturing, alteration, and permeability: in-situ properties in Hole 735B, Atlantis II fracture zone, Southwest Indian Ocean book chapter In: Von Herzen, RP; Robinson, PT; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program) 118 https://doi.org/10.2973/odp.proc.sr.118.144.1991 261-269 Geophysical logs recorded over 500 m in Hole 735B have been analyzed to identify the in-situ properties and the fracture permeability of basement rocks in the Atlantis II Fracture Zone. Although hydroxyl-bearing alteration minerals were found to be most abundant in the upper section of this hole, the highest permeabilities were also measured in this zone by packer tests. This interval corresponds to the presence of several open fractures imaged by the acoustic televiewer and to indications of fluid flow through transmissive fractures in the log responses. Negative temperature-gradient and large semblance anomalies were found to correlate well with the largest of the observed fracture zones near 40, 100-150, 200, and 264 mbsf. Although no stress-induced wellbore breakouts were observed in the televiewer images, most of the 70 identified fractures strike subparallel to the north-south fracture zone and dip steeply west-southwest. These fractures probably formed as a result of normal faulting on the transform side of the uplifted ridge, where Hole 735B was sited in the Atlantis II Fracture Zone, rather than as a direct result of horizontal plate-tectonic motion. 57.2662 57.2662 -32.724 -32.724 57.2662 -32.724 1987-12-06T04:45:00 1987-12-11T01:00:00 28.6 458.04 ODP Ocean Drilling Program https://www-odp.tamu.edu:443/ Ocean Drilling Program, Texas A&M University ODP http://www-odp.tamu.edu/ https://ror.org/01f5ytq51 118-735B -32.724 57.2662 -731.0 1987-12-06T04:45:00 1987-12-11T01:00:00 500.7 m 434.81 m South Indian Ridge, South Indian Ocean Leg118 https://doi.org/10.2973/odp.proc.ir.118.1989 Robinson, Paul T von Herzen, Richard P 1987-10-17 1987-12-14 Joides Resolution https://www-odp.tamu.edu:443/resolutn.html Drilling/drill rig DRILL 88 cores; 500.7 m cored; 0 m drilled; 86.8 % recovery 140 CC-BY-3.0 Creative Commons Attribution 3.0 Unported https://creativecommons.org/licenses/by/3.0/ DEPTH, sediment/rock Depth sed m depth http://purl.obolibrary.org/obo/PATO_0001595 sediment http://purl.obolibrary.org/obo/ENVO_00002007 rock Length L http://dbpedia.org/resource/Length Depth sed [m] Azimuth Azim deg https://en.wikipedia.org/wiki/Azimuth Angle http://dbpedia.org/resource/Angle Plane Angle http://dbpedia.org/resource/Plane_angle Borehole televiewer (BHTV) Goldberg David Azim [deg] Dip Dip deg https://en.wikipedia.org/wiki/Strike_and_dip Angle http://dbpedia.org/resource/Angle Plane Angle http://dbpedia.org/resource/Plane_angle Borehole televiewer (BHTV) Goldberg David Dip [deg] supplement citable author20316 author270 author37913 basis5 campaign90 event13506 geocode1 geocode1599 geocode1600 geocode1601 geocode8128 inst34 license101 method10974 method654 param4916 param7145 pi37913 project3 ref33712 term1073131 term20827 term38263 term41056 term43765 term43863 term43915