Discontinuity frequency in rock masses

Hudson, John; Priest, Stephen D.

doi:10.1016/0148-9062(83)90329-7

Cited by 177 publications

(63 citation statements)

References 3 publications

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“…The amount of brittle fault-related deformation (damage density) was quantified using the 174 line intersection method from Hudson and Priest (1983), which is based on counting the 175 intersections of subsidiary faults, fractures and veins per meter. 176 177…”

Section: Results 136mentioning

confidence: 99%

Tectonic evolution of the Ganos segment of the North Anatolian Fault (NW Turkey)

Janssen

Bohnhoff

Vapnik

et al. 2009

Journal of Structural Geology

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Section: Results 136mentioning

confidence: 99%

Tectonic evolution of the Ganos segment of the North Anatolian Fault (NW Turkey)

Janssen

Bohnhoff

Vapnik

et al. 2009

Journal of Structural Geology

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“…We used a line intersection (Hudson and Priest, 1983) inventory method at each station to measure the numbered orientations of small faults, fractures, and veins and to measure foliation orientation. Samples for thin sections were also collected at each station.…”

Section: Methodsmentioning

confidence: 99%

Mesoscopic structure of the Punchbowl Fault, Southern California and the geologic and geophysical structure of active strike-slip faults

Schulz

Evans

2000

Journal of Structural Geology

137

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“…Consequently, subhorizontal structures tend to be overestimated and steeply dipping structures underestimated. Some Authors [e.g., Hudson and Priest, 1983;Narr and Lerche, 1984;Newmark et al, 1985;Narr, 1996] have suggested some corrections for the verticality of a hole. However, such corrections have been calibrated on sedimentary, bedded rocks, an assumption that cannot be adopted in the present study.…”

Section: A2 Structure Orientationmentioning

confidence: 99%

Deformation pattern in a massive ponded lava flow at ODP‐IODP Site 1256: A core and log approach

Tartarotti

Fontana

Crispini

2009

Geochem Geophys Geosyst

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A complete “in situ” section of upper oceanic crust, from extrusive lavas, through dikes into gabbros has been recently drilled for the first time in 15 Ma old crust created at the superfast spreading East Pacific Rise (EPR). The upper igneous basement cored at Ocean Drilling Program (ODP)–Integrated Ocean Drilling Program (IODP) Holes 1256C and 1256D consists of sheet flows and massive flows, including a ponded lava flow unit (“lava pond”) interpreted as a thick lava flow delivered off‐axis and accumulated in a topographic depression. Fine‐scale structural analysis shows that the lava pond is much less fractured than the deeper lavas, probably as the effect of structure spacing that is larger than in the underlying lava flows. In Hole 1256D, structures are mainly subhorizontal in the lava pond and become steeper downhole, toward the sheeted dike complex. This reflects the distance of the lava pond from the stress field produced by the intrusion of dikes at depth, inducing mostly subvertical eruptive fractures and fracture network, and the distance of the site from active rifting at the EPR. Contrasting structural patterns in the lava pond and in the deeper parts of the drilled section are reflected in contrasting physical properties patterns, as obtained by shipboard and downhole logging data. Electrical resistivity, compressional velocity, and bulk density are generally higher, whereas natural radioactivity and neutron porosity are lower in the lava pond than in the deeper hole. The occurrence of a thick massive lava flow at the top part of the volcanic section affects the deformation pattern of the entire drilled crust and, consequently, its permeability regime which, in turn, controls the geometry and distribution of hydrothermal circulation and basalt alteration.

show abstract

Discontinuity frequency in rock masses

Cited by 177 publications

References 3 publications

Tectonic evolution of the Ganos segment of the North Anatolian Fault (NW Turkey)

Tectonic evolution of the Ganos segment of the North Anatolian Fault (NW Turkey)

Mesoscopic structure of the Punchbowl Fault, Southern California and the geologic and geophysical structure of active strike-slip faults

Deformation pattern in a massive ponded lava flow at ODP‐IODP Site 1256: A core and log approach

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