The next level of complexity in explanation addresses the transpressive nature of the Alpine Fault, and the consequent development and continued growth of the Southern Alps. The Alpine Fault marks a transform boundary between the two plates, and further south the Indo-Australian Plate subducts under the Pacific Plate forming the Puysegur Trench. Snow on the mountains of the Pacific plate contrasts with the lower land of the Australian plate. Nabelek, John L. Abstract. Then come back to the surface and find out about the geo-science underway to unlock the secrets of the Hikurangi subduction zone. [6], The Pacific Plate originated at the triple junction of the three main oceanic plates of Panthalassa, the Farallon, Phoenix, and Izanagi Plates, around 190 million years ago.The plate formed because the triple junction had converted to an unstable form surrounded on all sides by transform faults, due to the development of a kink in one of the plate boundaries. The type of plate boundary at the Alpine Fault is a transform boundary. In the simple, introductory textbook explanation, the Alpine Fault plate boundary system through South Island, New Zealand is simply a "San Andreas-like continental transform that links two subduction zones. The southern part of Zealandia, which is to the east of this boundary, is the plate's largest block of … It forms the sharp line separating the snow-covered Southern Alps in the east from the low coastal plain bordering the Tasman Sea in the west. [citation needed]. In the south of the Island, it joins the east-directed Fiordland subduction zone while in the north, it splits into several strands that link with the west-directed North Island subduction zone. The Alpine Fault (AF) is a major continental plate boundary between the Australian and Pacific plates, linking oppositely-dipping subduction zones in New Zealand. The Alpine Fault, a transpressional plate boundary between the Australia-Pacific plates, is known to rupture periodically (200-400yr) with large magnitude earthquakes (Mw~8) and is currently nearing the end of its latest interseismic period. The Pacific Plate is almost entirely oceanic crust, but it contains some continental crust in New Zealand, Baja California, and coastal California. Although predominantly associated with subduction zones, tremor also occurs along the deep extension of the strike-slip San Andreas Fault. The Alpine Fault is one of the world's most intensively studied faultlines. learning modules are best viewed on a desktop, laptop or tablet, they are not suitable for viewing on mobile phones or small screens. Find out how it was discovered and learn what science can tell us about Alpine Fault earthquakes. This fault has ruptured four times in the past 900 years, each time producing an earthquake of about magnitude 8. It forms a transform boundary between the Pacific Plate and the Indo-Australian Plate. The Alpine Fault is one of the world's major plate boundaries and New Zealand's most hazardous earthquake-generating fault. https://tectonics-etc.blogspot.com/2011/04/alpine-fault.html The Alpine Fault runs right through the heart of New Zealand's glacier county on the country's south island. Generally the fault has a simple straight trace, striking ca. The first three modules have been aligned to Level 4-6 Achievement Objectives from the Science Learning Area of the New Zealand Curriculum and are accompanied by a Teacher Guide to support their use in the classroom. [3], Hillis and Müller are reported to consider the Bird's Head Plate to be moving in unison with the Pacific Plate. The Alpine Fault is a geological fault, specifically a right-lateral strike-slip fault, that runs almost the entire length of New Zealand’s South Island. : A FOCUSED LOOK AT THE ALPINE FAULT, NEW ZEALAND 2195 A 60-strong team of geologists and drillers has set up a drill site in a cow paddock in the Whataroa Valley, north of Franz Josef Glacier, to drill deep into the Alpine Fault. In the middle of the eastern side is a transform boundary with the North American Plate along the San Andreas Fault, and a boundary with the Cocos Plate. Find out how it was discovered and learn what science can tell us about Alpine Fault earthquakes. In between the Hikurangi Subduction Zone and the Alpine Fault is a broad area of complex active faults, called the Marlborough Fault System. Alpine Fault at Gaunt Creek, J.Thomson / GNS Science Here you can get right up close to the plate boundary fault that runs the length of the South Island. 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