Geometric pattern, rupture termination and fault segmentation of the Dixie Valley—Pleasant Valley active normal fault system, Nevada, U.S.A.

Zhang, Peizhen; Slemmons, David B.; Feng-ying, Mao

doi:10.1016/0191-8141(91)90064-p

Cited by 121 publications

(75 citation statements)

References 22 publications

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“…These pull-apart basins are usually less than 2 km wide (perpendicular to the fault segments) and are not large enough to (bottom) An interpretation of the stratigraphy in the cross section with the location of the sample shown: 1, grayish yellow to grayish black silt layers, with lots of roots of dry land plants; 2, yellowish white gravel layers, the pebbles are mostly about 0.2-0.5 cm in diameter; 3, grayish yellow sandy silt, containing a few scattered gravels; 4, grayish white gravel layers, the pebbles are mostly about 1 -3 cm in diameter; 5, grayish yellow sandy silt, silty clay; 6, light grayish green gravel layers, the pebbles are mostly about 1 cm in diameter; 7, massive homogeneous reworked loess; 8, light grayish green gravel layers, interbedded with thin sandy silt lenses. form a structural discontinuity that can significantly impede a propagating earthquake rupture [Zhang et al, 1991b[Zhang et al, , 1999. The Jingtai pull-apart basin is 5 km wide at the western end ( Figure 2).…”

Section: Tectonic Setting and Geometric Pattern Of The Haiyuan Faultmentioning

confidence: 99%

Late Quaternary left‐lateral slip rate of the Haiyuan fault, northeastern margin of the Tibetan Plateau

et al. 2009

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Slip rates of major active strike‐slip faults within and around the Tibetan Plateau provide constraints for understanding the dynamics of continental deformation in general because large slip rates can be taken to imply localized deformation between rigid blocks and low slip rates on faults are more consistent with distributed deformation. Several major strike‐slip faults have been studied during the last 3 decades. As one of important active strike‐slip faults in and around the Tibetan Plateau, the slip rate of the Haiyuan fault has been discrepantly estimated to be high by proponents of “escape tectonics” or low by others and GPS observations. To better constrain its slip rate and then to better understand the mechanics of intracontinental deformation, we try to more carefully consider offset geomorphic features and age constraints along the Haiyuan fault. In this paper, we select three sites where both upper and lower bounds of slip rate can be obtained. We find that slip rates are 4.2 ± 0.8 mm/yr at the Shaomayin, 4.5 ± 0.7 mm/yr at Gaowanzi, and 5.0 ± 2.5 mm/yr at Huangliangtan site. Combinations of these rates with those published previously yield an average slip rate of 4.5 ± 1.0 mm/yr on the Haiyuan fault. This rate agrees with the present‐day slip rate of 4.3 ± 1.5 mm/yr measured by GPS, 4.2–8 mm/yr by interferometric synthetic aperture radar, and ∼5 mm/yr through paleoseismological studies. The temporal consistency suggests a steady state process of strain accumulation and release along the Haiyuan fault. The low slip rate suggests that the Haiyuan fault, similar to the Altyn Tagh fault, does not transfer a significant portion of the convergence between India and Asia out of India's path into Eurasia but merely redistributes crustal thickening.

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Section: Tectonic Setting and Geometric Pattern Of The Haiyuan Faultmentioning

confidence: 99%

Late Quaternary left‐lateral slip rate of the Haiyuan fault, northeastern margin of the Tibetan Plateau

et al. 2009

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“…8). The increases in both slip rates and surface displacements towards this segment termination is suggestive of synthetic overlapping of the segment boundaries (e.g., Morley et al 1990;Zhang et al 1991) (Fig. 7).…”

Section: Fault Segmentationmentioning

confidence: 99%

Neotectonics of the offshore Cape Egmont Fault Zone, Taranaki Basin, New Zealand

Nodder

1993

New Zealand Journal of Geology and Geophysics

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The Cape Egmont Fault Zone (CEFZ) is a major structural boundary within the predominantly offshore Taranaki Basin. The northeast-southwest-striking principal fault within this zone, the Cape Egmont Fault (CEF), represents the westernmost zone of active deformation associated with the Hikurangi subduction system, and is characterised by normal separation and pronounced surface expression across the Taranaki continental shelf. It has a 53 km long, 1-5 m high seafloor scarp, located 6 km to the east of the Maui-A production platform, and comprises four segments, each characterised by differences in fault geometry and behaviour. Average slip rates on the CEF for the last 225 000 years range from 0 to 0.8 mm/yr, suggesting concomitant extension rates of 0.1-1.8 mm/yr that are comparable with the deformation rates calculated for onshore active faults in the Taranaki-Wanganui region. The presence of a seafloor scarp and historic seismicity associated with the CEFZ are considered to be indicative of the recently active nature of the CEF. Analyses of high-resolution seismic reflection profiles and piston core samples suggest that the most recent movement on the CEF was at least post-10-11 ka ago. During the late Pliocene-Quaternary, it is unlikely that the CEFZ has accommodated significant amounts of strike-slip, as proposed by previous workers. Movement over the last 2-3 Ma is inferred to have been predominantly normal, possibly with an element of dextral oblique-slip.

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“…The monoclines are all curved in map view, following the traces of the faults. If a segmented normal fault were to exist at some location in the subsurface and the segments were linked across the relay zone between them, the resultant fault trace would contain a bend, as is commonly seen along surface-breaking normal faults (dePolo et al, 1991;Machette et al, 1991;Zhang et al, 1991). If these linked fault segments were then to propagate up towards the surface, producing surface flexure above their upper tips, the resultant monocline should also be curved, as occurs at Thingvellir.…”

Section: Thingvellirmentioning

confidence: 99%

Evolution of vertical faults at an extensional plate boundary, southwest Iceland

Grant

Kattenhorn

2004

Journal of Structural Geology

113

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Geometric pattern, rupture termination and fault segmentation of the Dixie Valley—Pleasant Valley active normal fault system, Nevada, U.S.A.

Cited by 121 publications

References 22 publications

Late Quaternary left‐lateral slip rate of the Haiyuan fault, northeastern margin of the Tibetan Plateau

Late Quaternary left‐lateral slip rate of the Haiyuan fault, northeastern margin of the Tibetan Plateau

Neotectonics of the offshore Cape Egmont Fault Zone, Taranaki Basin, New Zealand

Evolution of vertical faults at an extensional plate boundary, southwest Iceland

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