Width of the Alpine Fault Zone, New Zealand

Kupfer, Donald Harry

doi:10.1080/00288306.1964.10428125

Cited by 12 publications

(4 citation statements)

References 5 publications

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“…It can be traced for at least 120 miles, and in places, for example near Greymouth and Mt Bovis, it occupies a width of at least 3 miles. This width is not uncommonly associated with large tectonic features, and a width of the same order of magnitude is associated with the Alpine Fault Zone (Kupfer, 1964).…”

Section: Summary and Discussionmentioning

confidence: 81%

The Paparoa Tectonic Zone

Laird

1968

New Zealand Journal of Geology and Geophysics

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The Paparoa Tectomc Zone (new name) extends for 120 miles from the Alpine Fault at the Hok1tika River to Kongahu Point, west Nelson, thus obliquely crossing the Paparoa Range. In the Late Tertiary and Quaternary, the zone was folded and fractured in a scissors movement, pivoting northeast of Greymouth, and up-faulting eastern blocks in the north and western ores in the south. A previous scissors movement along the same zone but in the opposite sense had occurred in late Cretaceous and early Tertiary times. The areas of down-faulting and thickest sedimentary fill are indicated by their coincidence with the highest ranks of the Brunner coals; and coarse breccias and conglomerates, extending outwards from the zone at several localities, were produced by vigorous faulting about uppermost Eocene times. Some Mwcene faulting also occurred, perhaps accounting for the absence of lower Tertiary beds in the Kawhaka bore. Orogenic movements during the Mwcene-Quaternary were accompanied by reverse faulting and overfoldmg, and the Paparoa and Papahaua Ranges probably were produced by high-angle overthrusting. In contrast the late Cretaceous-early Tertiary movements were accompanied by normal faulting. Changes in the direction of Pnncipal Honzontal Stress in the zone and their implications on the history of the Alpine Fault are discussed.

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Section: Summary and Discussionmentioning

confidence: 81%

The Paparoa Tectonic Zone

Laird

1968

New Zealand Journal of Geology and Geophysics

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“…Both of these papers include a full list of references, as also does Kupfer (1964) in his paper on the width of the Alpine Fault zone.…”

Section: Previous Workmentioning

confidence: 99%

The Fraser fault in central Westland, New Zealand, and its associated Rocks

Young

1968

New Zealand Journal of Geology and Geophysics

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“…We concur with this assessment, with the Fairweather Transform and the Border Ranges The Fairweather fault, at least where exposed, is generally very narrow and measured at less than 100 m wide at one site (Witter et al, 2021), similar to the localized and narrow Denali fault. The Alpine fault of New Zealand in places is similarly a narrow and localized fault and has been since at least the Neogene and likely longer (<20 m wide; Kupfer, 1964;Barth et al, 2013). This transpressive fault system has experienced vertical extrusion of crustal blocks between parallel sub-vertical faults (Klepeis et al, 2019).…”

Section: Vertical Extrusion Between the Fairweather Transform Fault A...mentioning

confidence: 99%

Large-scale, crustal-block vertical extrusion between the Hines Creek and Denali faults coeval with slip localization on the Denali fault since ca. 45 Ma, Hayes Range, Alaska, USA

Benowitz¹,

Roeske

Regan

et al. 2022

Geosphere

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Oblique convergence along strike-slip faults can lead to both distributed and localized deformation. How focused transpressive deformation is both localized and maintained along sub-vertical wrench structures to create high topography and deep exhumation warrants further investigation. The high peak region of the Hayes Range, central Alaska, USA, is bound by two lithospheric scale vertical faults: the Denali fault to the south and Hines Creek fault to the north. The high topography area has peaks over 4000 m and locally has experienced more than 14 km of Neogene exhumation, yet the mountain range is located on the convex side of the Denali fault Mount Hayes restraining bend, where slip partitioning alone cannot account for this zone of extreme exhumation. Through the application of U-Pb zircon, 40Ar/39Ar (hornblende, muscovite, biotite, and K-feldspar), apatite fission-track, and (U-Th)/He geo-thermochronology, we test whether these two parallel, reactivated suture zone structures are working in tandem to vertically extrude the Between the Hines Creek and Denali faults block on the convex side of the Mount Hayes restraining bend. We document that since at least 45 Ma, the Denali fault has been bent and localized in a narrow fault zone (<160 m) with a significant dip-slip component, the Mount Hayes restraining bend has been fixed to the north side of the Denali fault, and that the Between the Hines Creek and Denali faults block has been undergoing vertical extrusion as a relatively coherent block along the displacement “free faces” of two lithospheric scale suture zone faults. A bent Denali fault by ca. 45 Ma supports the long-standing Alaska orocline hypothesis that has Alaska bent by ca. 44 Ma. Southern Alaska is currently converging at ~4 mm/yr to the north against the Denali fault and driving vertical extrusion of the Between the Hines Creek and Denali faults block and deformation north of the Hines Creek fault. We apply insights ascertained from the Between the Hines Creek and Denali faults block to another region in southern Alaska, the Fairweather Range, where extreme topography and persistent exhumation is also located between two sub-parallel faults, and propose that this region has likely undergone vertical extrusion along the free faces of those faults.

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Width of the Alpine Fault Zone, New Zealand

Cited by 12 publications

References 5 publications

The Paparoa Tectonic Zone

The Paparoa Tectonic Zone

The Fraser fault in central Westland, New Zealand, and its associated Rocks

Large-scale, crustal-block vertical extrusion between the Hines Creek and Denali faults coeval with slip localization on the Denali fault since ca. 45 Ma, Hayes Range, Alaska, USA

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