Preliminary report of telemetry examining in northern area of sheet Bandar anzali in scale of 1:100,000 with special view to marine geology

Category Geological field
Group Remotesensing
Author Flouriz Kheiri
Published At 13 May 2005

Summary

Geographical position & access ways to the region sheet of 1:100,000 is located in Bandar anzali, in latitude of 37۫ 30’ to 37۫ 00’ and longitude of 49۫ 00’ to 49۫ 30’ E.

Description

Generalities Geographical position & access ways to the region sheet of 1:100,000 is located in Bandar anzali, in latitude of 37۫ 30’ to 37۫ 00’ and longitude of 49۫ 00’ to 49۫ 30’ E. Most important access way to that road is degree one rood of the rasht that it joins Tehran to karaj, Ghazvin & then rasht & best possibility to access to this region is studied. Climate Climate is generally in southern parts of Caspian sea in mediteranean & amount of raining is about 1500 mm/ year. Former studies Oldest done work in the region is explanation of geological map in Quadrangle of Bandar pahavi in scale of 1:250,000. This study has been printed & studied by Clarck, Davis, Hamze pour & Jones with coopration of Ghoreishi, Hamdi & Navani in 1975. Geochemical studies in Anzali Lagoon carried out by Kosari in 1365 & then, in 1375, conectration of pollution in type of heavy metals was studied in Anzali Lagoon, by Soleiman Kosari & Shahram Mottaghi. Recently map of Bandar-e-Anzali was prepared by Hamid Nazari in scale of 1:100,000. Study purpose Purpose of the study is examining of changes in coastal zone & Anzali Lagoon & coastal morphology has been during two time interval (years of 1370 & 1379) in area of 1:100,000 in anzali in help of satellite data. In this relation, depth changes, marine flows (in coastal region), coastal line change, changes in extent of Anzali Lagoon rivers path & main channels & lineations of present data were examined in the region. Study method Studies based on using of TM data from land sat satellite are related to year 1370 & ATM data from land sat 7 is related to year 1379 with separation power of 30m. Mentioned data were used by using of geomatica software & hardware tools various for processing methods. Second Season Climatologic characteristics of studied region Temperature In general, in southern regions of Caspian Sea, climate of coasts has warm & wet Mediteranean climate. Medium temperature reaches to 30۫C upper zero. Raining rate Raining rote around Bandar-e-Anzali is about 1500mm in year. Raining rate becomes less in first semester of the year. Wind Degree difference is resulted from warming of the sea & land, in Caspian Sea areas, dependcence on soft winds result in creation of winds n this part from Caspian sea coasts. Direction of wind currents is from west to east (fig 8, geology of Caspian Sea, Ruhbakhsh 1380). Fluctuations in Caspian see level Regarding the represented reports from year 1356, level of Caspian sea is raised up & there is uplift about 2.4m until 1375 in Esfand (Geology of Caspian sea in page 59), prepared images in help to satellite data is emphasis on the uplift which has been explained in next pages in detail. Vegetation Forest vegetation is a vast part of studied area which has surrounded southern parts. Vegetation in the plain is mainly farms & gardens. It is necessary to mention that with time passing, extent of forest coverage is decreased & these parts turn to the garden. Third season: geology of studied region general geology of studied area with a short view on the map in scale of 1:250,000 in Bandar-e-Anzali in (1977). Sheet in scale of 1:100,000 of Bandar-e-Anzali has been located in south of Caspian Sea & it involves parts of Alborz structural basin & Kopet Dagh. Vegetation of the forest has been surrounded this area from north west to south east. Coastal deposits of Caspian sea has been extended in northern part to middle parts. Lithologic units has exposure only in small area in south western of the sheet. In south western parts, metamorphic Precambrian rocks, involving amphibolite & Gneiss, have much extent. In end of south western part, a vast extent of clastic sediments are seen which are belonged to Paleozoic. These sediments are seen in northern parts with Permian limestone. Cretaceous is seen mainly as volcanic tuff in north west of the sheet. Jurassic deposits can be seen as limestone & calcareous sandstone in south of anzali sheet. Igneous rocks are present as small out crops in south west of the sheet. Tectonic & morphology Alborz Mountains are accompanied with fractures, faults & thrusts in southern margin of the Caspian sea that their trend is parallel to shore of Caspian sea. Bed of Caspian sea in north of Bandar-e-Anzali indicates 100 to 250 m of uplift that it can not be resulted from accumulation of sandy hills due to submarine currents in Caspian sea & or accumulation of sefid rud & shafa rud sediments. Also likely it is resulted from disperse activity as burial. Caspian sea & Talab-e-Anzali is seen in northern part of the sheet. From age aspect, coastal plain of the Gillan is pertaining to after Pleistocene. So Talab-e-Anzali should be formed certainly in late Pleistocene & likely Miocene. Lower level of lagoon is formed from delta sediments & lagoon is formed due to growth of coastal sediments as coastal stripes & coastal domes. Faults have a trend of NW-SE, especially in south west of Anzali sheet. The image number indicates position of sheet in scale of 1:100,000 from Anzali in a geological map in scale of 1:250,000.   Telemetry examining Introduction Telemetry can be introduced as observation of land zone phenomena & or information gatherings about it, with specified tools & from relatively for distance. Telemetry is currently one of important & basic tools for study because of its advantages. One of characteristics in satellite images is uniform & vast view of it. This characteristic is very fundamental in determination characteristics of water bodies like marine flows, is other zones, displacement of sediments, progression & regression of sea.