Stark geomorphological contrasts developed across the faults, reflecting differential glacial exploitation of the pre-glacial drainage pattern. A commonly held view is that the orocline originated as a gigantic drag fold with Alpine Fault movement. The movement of the New Zealand continental block also resulted in a marine transgression and by the Oligocene period (about 35 million years ago) most of the country was submerged. The lack of moderate or large-magnitude earthquakes on the Alpine fault since reliable record keeping started means that the seismic potential of the Alpine fault must be inferred from indirect observations and theoretical considerations. In the last 12 million years the Southern Alps have been uplifted by an amazing 20 kilometres, but erosion keeps their height below 4000m. It's a rainy Tuesday evening in June with an early dusk made even earlier by the thick, wet, looming West Coast bush. The movement on faults causes fractures and alignment of minerals in the adjacent rocks. Journal o/Geology and Geophysics Vol. The Pacific Plate is upthrust on the left, with the Australian Plate on the right of the scarp. "Basically what we showed was that from the moment the Alpine Fault started to move in the direction it's moving today it more or less moved at the same rate." "It could well be that the event is further on in time. "You spend a lot of time checking. About a third say they are in the tourism business. Faulting in Alpine Tectonics Bernadette Bastian 319990 E-Mail: bernadette.bastian@rwth-aachen.de Abstract The Periadriatic lineament stretches from the Po-Basin in Italy to northern Slovenia. It may be quiet but it's not uneventful. Earthquakes along the fault, and the associated earth movements, have formed the Southern Alps. The uplift to the southeast of the fault is due to an … Franz Josef is quiet. As these two plates move against each other enormous pressure builds up which must eventually be released through earth movement. Large faults within the Earth's crust result from the action of plate tectonic forces, with the largest forming the boundaries between the plates, such as subduction zones or transform faults. There are no volcanoes because those are created from convergent plate boundary subduction. The fault runs hundreds of kilometres up the spine of the South Island, from Fiordland along the western edge of the Southern Alps. ", The Alpine Fault started as part of the break-up of the supercontinent Gondwana, with New Zealand starting to drift away from Antarctica about 80 million years ago.simo. Willkommen auf der offiziellen Website von Alpine Cars. Movement occurs during very large earthquakes approximately every 300 years, with the last one happening 300 years ago in 1717AD. "Any event so close to the fault is worthy of closer consideration. The Fault Core surrounds the PSZ with up to 30 metres of mixed gouge and the green clay-rich mash geologists call ultra-cataclasite. The Alpine Fault is a fault located in the South Island of New Zealand running through the middle for about 600 kilometers. strike-slip movement on the Alpine Fault. The movement of … Smile Machines. 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. Approximate rupture dates are 1717AD, 1620 AD, 1450 AD, and 1100 AD. The overall movement follows a dextral strike-slip movement, which can be reconstructed by close observation of plutons in the area. But months down the track, it will be interesting to see how the earthquake has changed the look of the fault at Gaunt Creek. part-time at university in W … In the past 25 million years, the two sides of the South Island have shifted more than 700 kilometres relative to each other along the Alpine Fault. 52. assistant with the Geological Survey in 1934, he studied geology. Introduction: Although the Alpine Fault has the potential to cause catastrophic damage on the West Coast, and elsewhere in the South Island, should there be major movement along all or part of its length, there has been no such movement in historical times. But the fact remains that, even after dozens of studies, some with international researchers, costing millions of dollars, nothing has changed - nobody can predict when the Alpine Fault is going to rip asunder. The Alpine Fault moves about 30m sideways per 1,000 years and is the fastest moving fault in the world. The Alpine Fault, which runs up the spine of the South Island, has ruptured five times in the past 1100 years - producing an earthquake of between magnitude 7 and 8 each time. A member of the audience asks about aftershocks. GNS Science principal scientist Dr Kelvin Berryman doubts last Sunday's quake was on the Alpine Fault and says there are several small faults just west of it. The finding underscored the fact the Alpine Fault was the big seismic hazard in the South Island and had been for a "very, very long time", Lamb said. The Alpine Fault is a geological fault that runs almost the entire length of New Zealand's South Island (c. 480 km) and forms the boundary between the Pacific Plate and the Indo-Australian Plate. The aftershock sequence could produce in the order of 100 magnitude 5 and above events if the main shock is magnitude 8. READ MORE: * Alpine Fault spreads across South Island, researchers say * When, not if: Alpine fault could cause 8 metres of movement * Scientists digging into new part of South Island's Alpine Fault. The Alpine Fault then runs the length of the South Island just west of the Southern Alps to near Lewis Pass in the central northern section of the island. The PSZ has accommodated most of the Alpine Fault’s strike-slip movement in the past, and will do so again in the future. How about if Sunday's Big Bay quake had been followed by more quakes of similar or larger magnitude up and down that section of the fault? Our scientific understanding concerning the next large earthquake on the Alpine Fault, New Zealand. Locally, a small vertical component of up-to-the-west movement is observed. They move at a relative rate of about 45mm per year. The idea was exciting but it was followed by a large amount of work. GNS Science earthquake geologist Robert Langridge studying layers in the trench across the Alpine Fault at Springs Junction. There is now a 27 per cent chance of that earthquake occurring in the next 50 years. "We put together this team of people who came at it from lots of different directions to make sure this was right, that we hadn't made some terrible mistake and missed something.". This fault system consists of many different smaller parts. 22, No'.) Here, the main part of South Island is being thrust over the Australian Plate on a bearing of about 250 degrees. Alpine Fault Tour's Elisabeth Frankish explains how the fault will rupture in the expected magnitude 8+ earthquake. You do a lot of testing. New research has found that the fault line may be the world's fastest-moving, having shifted around 700km in 25 million years. 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