New U-Pb and Rb-Sr dates indicate a … Our Knowledge of the Alpine Fault . NorCal vs. SoCal. The next severe earthquake on the Alpine Fault is likely to occur within the lifetime of most of us, or our children. A transform fault is a type of strike-slip fault at the boundary of two plates. The creation of the Alps was an internal process caused by the collision of the Australian and Pacific tectonic plates. The Southern Alps had not yet formed and most of New Zealand was covered in water. Strike-slip faults occur when two tectonic plates slide past each other. Alteration Along the Alpine Fault Helps Build Seismic Strain . The Alps form part of a Cenozoic orogenic belt of mountain chains, called the Alpide belt, that stretches through southern Europe and Asia from the Atlantic all the way to the Himalayas.This belt of mountain chains was formed during the Alpine orogeny.A gap in these mountain chains in central Europe separates the Alps from the … At 3 AM on May 29, 2013, the South Island’s technological … The Alpine Fault principal slip plane lies at the base of the distinctive mint-green cataclasites, and exhumes a kilometre-wide hanging-wall sequence of mylonites formed at depth. (i) Remnants of shore platforms occur as distinct levels of notched ridge crests and flat summits; degraded sea cliffs are common. However, this study has shown that for faults similar to the Alpine Fault, a fairly regularly repeating earthquake cycle is a realistic foundation on which to base earthquake hazard estimates. The Southern Alps were created during a time of huge uplift which has been called the Kaikoura Orogeny. The origin of the Alpine fault is located in the transition area between Fiordland and the Southern Alps on the South Island of New Zealand near Milford … Three types of evidence indicate that marine terraces are widespread in the Southern Alps of New Zealand. Earthquakes along the fault, and the associated earth movements, have formed the Southern Alps.The uplift to the southeast of the fault … This implies a dextral slip rate ranging from a possible minimum of 4 mm/yr to the maximum of 35 mm/yr … 13-21. 3. The Valley and Ridge province of Pennsylvania, which was formed during the collision of Africa and North America near the end of Paleozoic time (about 240,000,000 years ago), is a … This is why Palaeozoic rock belts in Nelson match reasonably well with those to the south in … Alpine Fault identifies earthquakes in the years 1717, 1620, and 1430, with estimated moment magnitudes of 7.9±0.3, 7.6±0.3, and 7.9±0.4, respectively (Sutherland et al., 2007). Laser-ablation 40 Ar/ 39 Ar step-heating analyses of 20 pseudotachylyte veins from a single location along the exhumed central portion of the active Alpine fault of New Zealand yield total gas age values between 1 and 19 Ma. Geometrical analysis enables an estimation of 450–1650 m of dextral displacement on the Alpine Fault at the releasing bend since the development of an unconformity estimated to have formed at between 30 and 110 ka. Clay mineral formation and fabric development in the DFDP-1B borehole, central Alpine Fault, New Zealand. The last significant quake on the Alpine Fault was in 1717. The Alpine Fault forms part of the on-land Pacific-Australian plate boundary. The Alpine Fault is a geological fault that runs entirely through New Zealand's South Island.It forms a boundary between the Pacific Plate and the Indo-Australian Plate. The orientations of intrusive rocks from a carbonatitic lamprophyre dike swarm and the history of emplacement relative to country-rock schist structures are compatible with intrusion into tension fractures and Riedel shears formed during initiation of the dextral wrench system of the Alpine fault. Date/Time Date(s) - Fri 3 November 16:00 - 17:00. The Structural Geology of the Alpine Fault . [5] The Alpine Fault quickly became accepted as a notable feature of the geology of New Zealand, and by 1948 was included on standard geological maps. Front page photograph: The Alpine Fault at Inchbonnie – Hohonus and Taramakau River looking east [L.Homer, GNS] M Trayes, Natural Hazards Analyst West Coast Regional Council February 20 12 A typical West Coast fieldwork location: Stony … Tristan Schmurr By Terri Cook 22 July 2016 Over the last 8000 years, the Alpine Fault has ruptured 27 times, on average that’s every 300 years. The San Andreas Fault was born about 30 million years ago in California, when the Pacific Plate and the North America plate first met. (ii) Scattered quartz beach pebbles occur on 16 of 18 levels of exhumed shore platforms in the … Alpine Fault outcrop showing banded cataclasite and breccia, Waikukupa River. Alpine orogeny, mountain-building event that affected a broad segment of southern Europe and the Mediterranean region during the Paleogene and Neogene periods (65.5 million to 2.6 million years ago). The total uplift in the Aoraki/Mt Cook region during the past two to three million years could be as much as 20,000 metres. Evidence shows that they are genetically related and were formed during coeval episodes of seismogenic … 2015 ) Pacific-Australian plate boundary by Terri Cook 22 July 2016 Date/Time Date ( s ) - Fri 3 16:00. Ridge crests and flat summits ; degraded sea cliffs are common related and formed! 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