Abstract
Geophysical logs recorded over 500m 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. 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. -from Authors
| Original language | English (US) |
|---|---|
| Title of host publication | Proc., scientific results, ODP, Leg 118, fracture zone drilling on the Southwest Indian Ridge |
| Editors | R.P. Von Herzen, P.T. Robinson |
| Publisher | ODP, Texas A&M University, College Station |
| Pages | 261-269 |
| Number of pages | 9 |
| State | Published - 1991 |
| Externally published | Yes |
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ASJC Scopus subject areas
- Earth and Planetary Sciences(all)
- Environmental Science(all)
Cite this
Fracturing, alteration, and permeability : in-situ properties in Hole 735B. / Goldberg, D.; Broglia, C.; Becker, Keir.
Proc., scientific results, ODP, Leg 118, fracture zone drilling on the Southwest Indian Ridge. ed. / R.P. Von Herzen; P.T. Robinson. ODP, Texas A&M University, College Station, 1991. p. 261-269.Research output: Chapter in Book/Report/Conference proceeding › Chapter
}
TY - CHAP
T1 - Fracturing, alteration, and permeability
T2 - in-situ properties in Hole 735B
AU - Goldberg, D.
AU - Broglia, C.
AU - Becker, Keir
PY - 1991
Y1 - 1991
N2 - Geophysical logs recorded over 500m 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. 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. -from Authors
AB - Geophysical logs recorded over 500m 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. 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. -from Authors
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M3 - Chapter
SP - 261
EP - 269
BT - Proc., scientific results, ODP, Leg 118, fracture zone drilling on the Southwest Indian Ridge
A2 - Von Herzen, R.P.
A2 - Robinson, P.T.
PB - ODP, Texas A&M University, College Station
ER -