The Structural Geology of the Alpine Fault . Between 23 and 10 million years ago the western side of the Alpine Fault was moving northeast relative to the eastern side at a rate of between 1-10 cm per year. Tristan Schmurr By Terri Cook 22 July 2016 Trenches were excavated across the Alpine Fault trace at Haast to determine recent past earthquakes which have accompanied surface rupture and displacement on the fault. The Southern Alps were created during a time of huge uplift which has been called the Kaikoura Orogeny. 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). In the central South Island, the Alpine Fault is dextral-re-verse and bounds the western edge of the Southern Alps (Norris et al., 1990). 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. ... (563 km) since it formed. Alpine Fault outcrop showing banded cataclasite and breccia, Waikukupa River. The Alpine Fault is a ~900 km-long, active Australian-Pacific plate boundary structure, which accommodates up to 70–90% of total plate boundary motion across the South Island of New Zealand. The last significant quake on the Alpine Fault was in 1717. The Southern Alps had not yet formed and most of New Zealand was covered in water. The Alpine Fault is a geological fault, more specifically known as a right-lateral strike-slip fault, that runs almost the entire length of New Zealand's South Island.It forms a transform boundary between the Pacific Plate and the Indo-Australian Plate. The Alpine orogeny or Alpide orogeny [dubious – discuss] is an orogenic phase in the Late Mesozoic (Eoalpine) and the current Cenozoic that has formed the mountain ranges of the Alpide belt.These mountains include (from west to east) the Atlas, the Rif, the Baetic Cordillera, the Cantabrian Mountains, the Pyrenees, the Alps, the … Geologists and authorities are racing to quantify what might happen, and how they might respond in the event of the next one, likely to occur some time in the next 50 years. 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. The Alpine Fault has moved much more than previously thought, and more than any other known fault on land in the world, new research shows. Recent excavations across the fault trace here have provided clear evidence for three earthquakes since the terrace surface formed, each having about 8m of horizontal displacement. The creation of the Alps was an internal process caused by the collision of the Australian and Pacific tectonic plates. Clay mineral formation and fabric development in the DFDP-1B borehole, central Alpine Fault, New Zealand. Earthquakes along the fault, and the associated earth movements, have formed the Southern Alps.The uplift to the southeast of the fault … In mountain: Alpine- (or Himalayan-)type belts …regularly spaced folds—alternating anticlines and synclines—and thrust on top of one another. 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. Over the last 8000 years, the Alpine Fault has ruptured 27 times, on average that’s every 300 years. 1, pp. Our Knowledge of the Alpine Fault . [Chapter Break] After their ground­breaking paper on the Alpine Fault, Willett was posted to Invercargill and Wellman to another war­time project at d’Urville Island. New Zealand Journal of Geology and Geophysics: Vol. 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. The Alpine Fault forms part of the on-land Pacific-Australian plate boundary. The Alpine Fault ruptures—on average—every 330 years with a magnitude 8 earthquake. Generally the fault has a simple straight trace, striking ca. At 3 AM on May 29, 2013, the South Island’s technological … 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 … Mt. 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). (ii) Scattered quartz beach pebbles occur on 16 of 18 levels of exhumed shore platforms in the … 2. St. Helens formed in a subduction zone. Three types of evidence indicate that marine terraces are widespread in the Southern Alps of New Zealand. It is among the more active plate boundary faults in the world and is one of the most scientifically appealing faults to study because of its size, fast rate of movement, and … The Alpine fault does not have volcanic activity. A view of Aoraki (Mount Cook) in the Southern Alps of New Zealand, still on the rise due to the Alpine Fault. 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 … A transform fault is a type of strike-slip fault at the boundary of two plates. 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 … Dislocation of river terraces across the Alpine Fault shows that over the past 10,000 years, this uplift has continued at an average of 10 millimetres or more a year. 13-21. Country of origin: New Zealand Location: Auckland, Auckland (early); Brisbane, Queensland, Australia (later) Status: Split-up Formed in: 2005 Genre: Melodic Progressive Metal Lyrical themes: N/A Last label: Rare Breed Records Years active: 2005-2013 . 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. 25 to 15 million years ago the majority of New Zealand was covered by the ocean. New U-Pb and Rb-Sr dates indicate a … Alteration Along the Alpine Fault Helps Build Seismic Strain . 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. Future Earthquake Predictions. As the Australian… The Alpine Fault is a geological fault, known as a right-lateral strike-slip fault, that runs almost the entire length of New Zealand's South Island. 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 3. New Zealand’s Alpine Fault is one of the larger and more rapidly slipping continental strike-slip faults on the planet, and, as such, constitutes a … Earthquakes along the fault have formed the Southern Alps The next severe earthquake on the Alpine Fault is likely to occur within the lifetime of most of us, or our children. 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 San Andreas Fault was born about 30 million years ago in California, when the Pacific Plate and the North America plate first met. Date/Time Date(s) - Fri 3 November 16:00 - 17:00. [5] Alpine Fault. Between 25 and 12 million years ago the movement on the proto-Alpine Fault was exclusively strike-slip. The Alpine Fault, which is visible from space, extends for about 650km from south of Fiordland along the spine of the Southern Alps and into Marlborough. Strike-slip faults occur when two tectonic plates slide past each other. This implies a dextral slip rate ranging from a possible minimum of 4 mm/yr to the maximum of 35 mm/yr … NorCal vs. SoCal. 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. 58, No. (2015). Based on this research, scientists have estimated there is a 30% probability of a large earthquake on the Alpine Fault in the next 50 years. 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