١ ﺳﻨﮓ ﭘﺘﺮوﻟﻮژي و ژﺋﻮﺷﯿﻤﯽ ﻣﻄﺎﻟﻌﻪ ﺣﺪواﺳﻂ ﻫﺎي ﺗﺎ ﺑﺎزﯾﮏ ﻣﻌﺪن ﺷﺮق ﺗﮑﻨﺎر ) ﺷﻤﺎل ﺑﺮدﺳﮑﻦ ﻏﺮب( ﺑﺎﻗﺮزاده ﻣﻨﻈﻤﯽ رﺿﺎ 1 * ، ﮐﺮﯾﻢ ﻣﺤﻤﺪﺣﺴﻦ ﭘﻮر 2 رﺣﯿﻤﯽ ﺑﻬﻨﺎم، 2 ﺣﯿﺪرﯾﺎن ﻣﺤﻤﺪرﺿﺎ، 2 1 * زﻣﯿﻦ دﮐﺘﺮي داﻧﺸﺠﻮي اﯾﺮان ﻣﺸﻬﺪ، ﻓﺮدوﺳﯽ داﻧﺸﮕﺎه اﻗﺘﺼﺎدي ﺷﻨﺎﺳﯽ 2 زﻣﯿﻦ ﮔﺮوه اﯾﺮان ﻣﺸﻬﺪ، ﻓﺮدوﺳﯽ داﻧﺸﮕﺎه ﻋﻠﻮم، داﻧﺸﮑﺪه ﺷﻨﺎﺳﯽ، - ﭼﮑیﺪﻩ ﻗﺮﺍﺭ ﻣﺮﻛﺰﻱ ﺍﻳﺮﺍﻥ ﻗﺎﺭﻩ ﺧﺮﺩ ﺷﻤﺎﻝ ﺩﺭ ﺗﻜﻨﺎﺭ ﺳﺎﺧﺘﺎﺭﻱ ﺯﻭﻥ ﻣﻴﺎﻧﻲ ﺑﺨﺶ ﺩﺭ ﻣﻄﺎﻟﻌﻪ ﻣﻮﺭﺩ ﻣﻨﻄﻘﻪ ﺍﺳﺖ ﮔﺮﻓﺘﻪ. ﺍﻳﻦ ﺩﺭ ﻣﻨﻄﻘﻪ، ﺳﻨﮓ ﻭﻟﻜﺎﻧﻴﻜﻲ ﻫﺎﻱ) ﺭیﻮﻟیﺖ، ﺭیﻮﺩﺍﺳیﺖ ﺩﺍﺳیﺖ ﻭ( ﺭﺳﻮﺑﻲ ﻭﺍﺣﺪﻫﺎﻱ ﺳﺮﻱ ﻳﻚ ﺑﺎ ﻫﻤﺮﺍﻩ ﺷﺪﻩ ﺩﮔﺮﮔﻮﻥ ﺷﺪﻩ ﺩﮔﺮﮔﻮﻥ) ﻣﺎﺳﻪ ﻣﺎﺳﻪ ﺗﻮﻑ ﺍﺳﻠیﺖ، ﺷیﺴﺖ، ﺳﻨﮓ، ﺳﻨﮕﯽ ﺳﻨﮓ، ﺁﻫﮏ( ﺭﺧﻨﻤﻮﻥ ﻭ ﺟﺮیﺎﻧﯽ، ﺑﺎﺯﺍﻟﺖ ﺍﺯ ﮐﻮﭼﮑﯽ ﻫﺎﯼ ﻣﺠﻤﻮﻋﻪ ﺩﺍﺩﻩ ﺗﺸﻜﻴﻞ ﺭﺍ ﺗﻜﻨﺎﺭ ﺳﺎﺯﻧﺪ ﻋﻨﻮﺍﻥ ﺗﺤﺖ ﺍﻱ ﺍﻧﺪ. ﺗﻮﺳﻂ ﻣﺠﻤﻮﻋﻪ ﺍﻳﻦ ﮔﺮﺍﻧیﺖ ﺳﻦ ﺑﺎ ﺑﻮﺭﻧﻮﺭﺩ ﻧﺌﻮ ﭘﺮﻭﺗﺮﻭﺯﻭﺋیﮏ ﭘﺎیﺎﻧﯽ ﺍﺳﺖ ﮔﺮﻓﺘﻪ ﻗﺮﺍﺭ ﻧﻔﻮﺫ ﻣﻮﺭﺩ. ﻣﺠﻤﻮﻋﻪ ﺳﻨﮓ ﻫﺎﻱ ﺑﺎﺯیﮏ ﻭ ﺣﺪﻭﺍﺳﻂ ﻛﻤﭙﻠﻜﺲ ﺍﻳﻦ ﺍﺯ ﻣﺘﺸﮑﻞ ﺩﻳﻮﺭﻳﺖ ﮔﺎﺑﺮﻭ، ﻭ ﻛﻮﺍﺭﺗﺰﺩﻳﻮﺭﻳﺖ ﻣﻌﺎﺩﻝ ﻭ ﻫﺎﯼ ﺭیﺰﺩﺍﻧﻪ) ﻣیﮑﺮﻭ( ﺳﻨﮓ ﺍیﻦ ﻣﯽ ﻫﺎ ﺑﺎﺷﺪ ﺳﻨﮓ ﮐﻪ ﻗﻄﻊ ﺭﺍ ﻣﻨﻄﻘﻪ ﺑﺮﻧﻮﺭﺩ ﮔﺮﺍﻧیﺘﻮﺋیﺪﯼ ﻫﺎﯼ ﻣﯽ ﮐﻨﻨﺪ. ﻏﺎﻟﺐ ﺑﺎﻓﺖ ﺍیﻦ ﺳﻨﮓ ﻫﺎ، ﺩﺭ ﮔﺮﺍﻧﻮﻻﺭ ﺍﺳﺖ ﺩﺍﻧﻪ ﻣﺘﻮﺳﻂ ﺗﺎ ﺷﺖ. ﺑﻪ ﺳﻨﮕﻲ ﻣﺠﻤﻮﻋﻪ ﺍﻳﻦ ﻣﺮﻛﺰﻱ ﺑﺨﺶ ﺩﺭ ﻭﻳﮋﻩ ﺩﺍﻳﻚ ﺳﺮﻱ ﻳﻚ ﺗﻮﺳﻂ ﻗﺮﺍﺭ ﻫﺠﻮﻡ ﻣﻮﺭﺩ ﺁﭘﻠﻴﺘﻲ ﻫﻤﭽﻨﻴﻦ ﻭ ﻣﻴﻜﺮﻭﺩﻳﻮﺭﻳﺘﻲ ﻭ ﺍﻳﻨﺘﺮﺳﺮﺗﺎﻝ ﺷﺎﺧﺺ ﺑﺎﻓﺖ ﺑﺎ ﺩیﺎﺑﺎﺯﯼ ﻫﺎﻱ ﺍﺳﺖ ﮔﺮﻓﺘﻪ. ﺳﻨﮓ ﻣﺎﮔﻤﺎﻳﻲ ﺳﺮﻱ ﻛﺎﻟﻚ ﻣﺠﻤﻮﻋﻪ، ﺍﻳﻦ ﻫﺎﻱ ﻣﻲ ﺁﻟﻜﺎﻟﻦ ﺑﺎﺷﺪ. ﻧﻤﻮﻧﻪ ﺁﻟﻮﻣﻴﻦ، ﺍﺯ ﺍﺷﺒﺎﻉ ﺷﺎﺧﺺ ﻧﻈﺮ ﺍﺯ ﻫﺎ ﻣﻄﺎﻟﻌﻪ ﻣﻮﺭﺩ ﯼ ﺭﺩﻩ ﺩﺭ ﺳﻨﮓ ﻫﺎﯼ ﻗﺮﺍﺭ ﻣﺘﺎﺁﻟﻮﻣﻴﻦ ﻣﯽ ﮔیﺮﻧﺪ. ﺳﻨﮓ ﺍیﻦ ﻧﻈﺮ ﺍﺯ ﻫﺎ ﻣیﺰﺍﻥ ﭘﺘﺎﺳیﻢ، ﺧﺼﻮﺻیﺎﺕ ﻟﺤﺎﻅ ﺍﺯ ﻭ ﺑﻮﺩﻩ ﻣﺘﻮﺳﻂ ﻋﻨﺎﺻﺮ ﺍﺯ ﺷیﻤیﺎیﯽLILE ﻗﺒیﻞ ﺍﺯRb ، Cs ﻫﻤﺮﺍﻩ ﺑﻪTh ﻏﻨﯽ ﻣﯽ ﻧﺸﺎﻥ ﺷﺪﮔﯽ ﭼﻮﻥ ﻋﻨﺎﺻﺮﯼ ﻭ ﺩﻫﺪTi ﻭNb ﺩﺭ ﺗﻬﯽ ﺁﻧﻬﺎ ﺩﺍﺭﺩ ﺷﺪﮔﯽ. ﻧﺸﺎﻥ ﻣﻮﺿﻮﻉ ﺍیﻦ ﺍﺧﺘﻼﻁ ﺩﻫﻨﺪﻩ ﻣﺎﮔﻤﺎ ﺑﺎ ﺳﻨﮓ ﻫﺎﯼ ﺳﻨﮓ ﺍیﻦ ﻣﻨﺸﺄ ﺑﺮﺍﯼ ﺗﺤﺘﺎﻧﯽ ﭘﻮﺳﺘﻪ ﻫﺎ ﺍﺳﺖ. ﺗﺸﮑیﻞ ﻣﺤیﻂ ﺍیﻦ ﺳﻨﮓ ﺁﺗﺸﻔﺸﺎﻥ ﮐﻤﺎﻥ ﻣﺤیﻂ یﮏ ﻭ ﻗﺎﺭﻩ ﻓﻌﺎﻝ ﺣﺎﺷیﻪ ﻫﺎ،) VAG ( ﻓﺮﻭﺭﺍﻧﺶ ﺑﺎ ﮐﻪ ﺍﺳﺖ ﻣﺮﺗﺒﻂ ﺳﺒﺰﻭﺍﺭ ﺯﻭﻥ ﻭ ﻣﺮﮐﺰﯼ ﺍیﺮﺍﻥ ﻗﺎﺭﻩ ﺧﺮﺩ ﺑیﻦ ﻣﻮﺟﻮﺩ ﻧﺌﻮﺗﺘیﺲ ﺍﻗیﺎﻧﻮﺳﯽ ﭘﻮﺳﺘﻪ ﻣﯽ ﺷﻮﺩ. ﻭﻳﮋﮔﻲ ﻧﻈﺮ ﺍﺯ ﮐﺎﻧﯽ- ﺷ ﻨﺎﺳﯽ، ﺗﻮﺩﻩ ﺍﺯ ﺑﺮﺧﯽ ﻧﻔﻮﺫﯼ ﻫﺎﯼ ﺗﮑﻨﺎﺭ ﮐﻤﭙﻠﮑﺲ ﺑﺎﺯیﮏ ﻭ ﺣﺪﻭﺍﺳﻂ، ﺳﺮﯼ ﺑﻪ ﻣﮕﻨﺘیﺖ) ﺍﮐﺴیﺪﺍﻥ( ﺩﺍﺭﻧﺪ ﺗﻌﻠﻖ. Geochemistry and petrology investigation of intermediate and basic rocks of east-Taknar mine (Northwest Bardaskan) R. Monazzami Bagherzadeh 1* , M.H. Karimpour 2 , B. Rahimi 2 , M.R. Heydarian 2 ١* PH.D student of Economic Geology, Ferdowsi University of Mashhad, Iran ٢ Department of Geology, Faculty of Science, Ferdowsi University of Mashhad, Iran Abstract Study area is situated in middle part of Taknar structural zone in north of middle Iranian microcontinentent. In the area, metamorphosed volcanic rocks (rhyolite, rhyodacite and dacite) together with sedimentary units (sandstone, schist, slate, sandstony tuff, limestone) and small outcrops of current basalt, have formed the complex that named Taknar formation. In this complex has intruded by Bornavard granite to late Neoproterozoic age. The complex of intermediate and basic rocks has formed gabbro, diorite and quartzdiorite and their fine grain (micro type) that these rocks cut the Bournavard granitoid rocks. Major texture in mafic and intermediate rocks is granular texture (coarse and middle grains). This complex rocks, specially