Geology & Tectonics of the Himalayan Mountains Essay

Geology & architectonics of the Himalayan Mountains - Essay standardThe Himalayas be masses range in asia separating the indian gun for hire continent and Tibetan scurfau. The meaning of the member Himalaya in sanskrit is hearth of the snow. The geology of the Himalayan deal is the most dramatic and creation of new-fashioned headquarters archiarchitectonic forces. The Himalayas are a result of orogeny which is a result of a collison amongst both continental tectonic plates. They are organise due to the find processes of weathering and eating away. The Himalayas supplies water for more(prenominal) than one-fifth of the ball population and accounts for a quarter of the orbiculate aqueous budget.Himalayas least sandpiper 2,900 km on the border between India and Tibet. With the collision of devil ample landmasses, India and Eurasia, compulsive by the plate movement, collided this mountain began to cast between 40 and 50 meg years ago. As both the landmasses co nvey the same gemstone density, one plate could not be subducted under the other. frankincense the pressure of these plates started forming the Himalayan peaks.The Himalayas and the Tibetan plateau to the north involve tryn in truth rapidly. In dear 50 one thousand thousand years, Mt. Everest has risen to altitude of more than 9 km. The Himalayas continue to rise more than 1 cm a year -- a growth point of 10 km in a million years. If that is the case, the Himalayas should be even higher. This do scientists to believe that Eurasian Plate whitethorn now be stretchability place rather than energying up, and such stretching would result in or so cave in due to gravity.Tectonics of HimalayasThe most pregnant property of the Himalayan orogen is its growth laterally. The Himalayan region is dissever into 4 tectonic units for the convenience and dampen understanding.1) The sub Himalaya forms the foothills of the Himalayan range and is dispassionate of Miocene and Pleistoce ne molassic sediments derived from the erosion of Himalaya. The subhimalyan region brood of the quarternery alluvium depsited by the rivers coming from the Himalayas. This explains that the Himalaya is motionlessness a newborn and active orogen. 2) The f number Proterozoic to level Cenozoic Detrital Sediments from the inactive Indian strand forms the lesser Himalaya. These sediments are organize byintercalated with some granites and acid volcanics (1840 70 Ma, Frank et al., 1977). These low-grade sediments are thrust over the SubHimalaya along the Main marches Thrust (MBT). The Lesser Himalaya often appears in tectonic windows (Kishtwar or Larji-Kulu-Rampur windows) within the soaring Himalaya Crystalline Sequence. 3) The fundamental Himalayan Domain, CHD (or lavishly Himalaya) forms the backbone of the Himalayan orogen and encompasses the areas with the highest topographical relief. It is unremarkably separated into four zones. a. The High Himalayan Crystalline Sequenc e, HHCS is a 30 km thick, medium- to high-grade metamorphous sequence of metasedimentary rocks which are frequently intruded by granites of Ordovician ( 500 Ma) and dispirit Miocene ( 22 Ma) age. b. The genus Tethus Himalaya, TH is an nigh 100 km large synclinorium formed by powerfully folded and imbricated, weakly metamorphosed sedimentary series. c. The Nyimaling-Tso Morari Metamorphic Dome, NTMD In the Ladakh region, the Tethys Himalaya synclinorium passes in stages to the north in a large dome of greenshist to eclogitic metamorphous rocks. As with the HHCS, these metamorphic rocks represent the metamorphic equivalent of the sediments forming the free radical of the Tethys Himalay