کانسار مس حمزه‌لو: کانه زایی مس با میزبان رسوبی تیپ redbed در سازند قرمز بالایی، شمال باختر زنجان

ﮐﺎﻧﺴﺎر ﺣﻤﺰه در ﭘﻬﻨﻪ اﯾﺮان ﻣﺮﮐﺰی و در ﻓﺎﺻﻠﻪ 70 ﮐﯿﻠﻮﻣﺘﺮی ﺷﻤﺎلﺑﺎﺧﺘﺮ زﻧﺠﺎن ﻗﺮار دارد. ﮐﺎﻧﻪزاﯾﯽ ﻣﺲ در اﯾﻦ ﮐﺎﻧﺴﺎر درون واﺣﺪﻫﺎی ﻣﯿﮑﺮوﮐﻨﮕﻠﻮﻣﺮاﯾﯽ و ﻣﺎﺳﻪﺳﻨﮕﯽ ﺧﺎﮐﺴﺘﺮی رﻧﮓ ﻣﺘﻌﻠﻖ ﺑﻪ ﺳﺎزﻧﺪ ﻗﺮﻣﺰ ﺑﺎﻻﯾﯽ رخ داده اﺳﺖ. ﺑﺎﻓﺖ ﮐﺎﻧﺴﻨﮓ ﺷﺎﻣﻞ داﻧﻪﭘﺮاﮐﻨﺪه، ﺳﯿﻤﺎن ﺑﯿﻦ داﻧﻪای، ﻋﺪﺳﯽﺷﮑﻞ، ﺷﺒﻪﻻﻣﯿﻨﻪای، ﺟﺎﻧﺸﯿﻨﯽ و ﭘﯿﺮﯾﺖ ﻓﺮاﻣﺒﻮﺋﯿﺪال ﻣﯽﺑﺎﺷﺪ. در اﻓﻖﻫﺎی ﮐﺎﻧﻪدار، ﺳﻪ ﭘﻬﻨﻪ ﻗﺮﻣﺰ اﮐﺴﯿﺪان، ﺷﺴﺘﻪﺷﺪه و اﺣﯿﺎﯾﯽ ﮐﺎﻧﻪدار ﺗﺸﮑﯿﻞ ﺷﺪه اﺳﺖ. ﮐﺎﻟﮑﻮﺳﯿﺖ و ﭘﯿﺮﯾﺖ، ﮐﺎﻧﯽﻫﺎی ﻣﻌﺪﻧﯽ اﺻﻠﯽ در ﮐﺎﻧﺴﺎر ﺣﻤﺰهﻟﻮ ﻫﺴﺘﻨﺪ. ﻣﺎﻻﮐﯿﺖ، آزورﯾﺖ، ﮐﻮوﻟﯿﺖ، آﺗﺎﮐﺎﻣﯿﺖ، ﮔﻮﺗﯿﺖ و ﻫﻤﺎﺗﯿﺖ در اﺛﺮ ﻓﺮآﯾﻨﺪﻫﺎی ﺑﺮونزاد ﺗﺸﮑﯿﻞ ﺷﺪهاﻧﺪ. ﻣﻘﺎﯾﺴﻪ اﻟﮕﻮی ﻋﻨﺎﺻﺮ ﮐﻤﯿﺎب و ﮐﻤﯿﺎب ﺧﺎﮐﯽ در ﻧﻤﻮﻧﻪﻫﺎی ﮐﺎﻧﻪدار و ﻣﺎﺳﻪﺳﻨﮓﻫﺎی ﻗﺮﻣﺰ و ﺧﺎﮐﺴﺘﺮی ﺑﺪون ﮐﺎﻧﻪزاﯾﯽ، ﺑﯿﺎﻧﮕﺮ ﺗﻬﯽﺷﺪﮔﯽ در ﻣﯿﺰان اﯾﻦ ﻋﻨﺎﺻﺮ در ﻧﻤﻮﻧﻪﻫﺎی ﮐﺎﻧﻪدار اﺳﺖ. اﯾﻦ اﻣﺮ ﻣﯽﺗﻮاﻧﺪ ﺑﺎ ﺧﺮوج اﯾﻦ ﻋﻨﺎﺻﺮ ﻃﯽ ﻓﺮآﯾﻨﺪﻫﺎی ﺷﺴﺘﻪﺷﺪن و ﮐﺎﻧﻪزاﯾﯽ ﺗﻔﺴﯿﺮ ﺷﻮد. ﺑﺎ ﺗﻮﺟﻪ ﺑﻪ وﯾﮋﮔﯽﻫﺎﯾﯽ ﻣﺎﻧﻨﺪ ﻣﺤﯿﻂ ﺗﮑﺘﻮﻧﯿﮑﯽ، ﺳﻨﮓﺷﻨﺎﺳﯽ، ﭼﯿﻨﻪﺷﻨﺎﺳﯽ، ﮐﺎﻧﯽﺷﻨﺎﺳﯽ، ﺳﺎﺧﺖ و ﺑﺎﻓﺖ و ﻋﻮاﻣﻞ ﮐﻨﺘﺮلﮐﻨﻨﺪه ﮐﺎﻧﻪزاﯾﯽ (وﺟﻮد آﺛﺎر و ﺑﻘﺎﯾﺎی ﮔﯿﺎﻫﯽ، وﺟﻮد ﮔﻨﺒﺪﻫﺎی ﻧﻤﮑﯽ، ﺗﺨﻠﺨﻞ و ﻧﻔﻮذﭘﺬﯾﺮی ﻣﻨﺎﺳﺐ ﺳﻨﮓ ﻣﯿﺰﺑﺎن، ﮔﺴﻞﻫﺎ و ﺷﮑﺴﺘﮕﯽﻫﺎ)، ﮐﺎﻧﺴﺎر ﺣﻤﺰهﻟﻮ در دﺳﺘﻪ ﮐﺎﻧﺴﺎرﻫﺎی ﻣﺲ رﺳﻮﺑﯽ ﺗﯿﭗ redbed ﻗﺮار ﮔﺮﻓﺘﻪ و از اﯾﻦ ﻧﻈﺮ ﻗﺎﺑﻞ ﻣﻘﺎﯾﺴﻪ ﺑﺎ دﯾﮕﺮ ﮐﺎﻧﺴﺎرﻫﺎی ﻣﺲ رﺳﻮﺑﯽ ﺗﯿﭗ redbed در ﻣﻨﻄﻘﻪ ﻣﺎهﻧﺸﺎن ﻣﯽﺑﺎﺷﺪ. اﯾﻦ ﮐﺎﻧﺴﺎرﻫﺎ، ارﺗﺒﺎط ﻓﻀﺎﯾﯽ ﻧﺰدﯾﮑﯽ ﺑﺎ واﺣﺪﻫﺎی ﺗﺒﺨﯿﺮی و ﮔﻨﺒﺪﻫﺎی ﻧﻤﮑﯽ ﻣﻮﺟﻮد در ﺳﺎزﻧﺪ ﻗﺮﻣﺰ ﺑﺎﻻﯾﯽ دارﻧﺪ ﮐﻪ ﻣﯽﺑﺎﯾﺴﺖ در ﻣﻄﺎﻟﻌﺎت اﮐﺘﺸﺎﻓﯽ ﻣﻮرد ﺗﻮﺟﻪ ﻗﺮار ﮔﯿﺮد.

Hamzelou Cu deposit: Redbed type sediment-hosted copper mineralization in the Upper Red Formation, NW Zanjan

The Hamzelou Cu deposit, 70 km northwest of Zanjan, is located in the Central Iranian zone. Copper mineralization in this deposit occurred in grey microconglomerate and sandstone units of the Upper Red Formation. Disseminated and cemented textures along with lensshaped, solution seems, replacement, and framboidal pyrite are the main ore textures at Hamzelou deposit. The ore horizons contain red oxidized zone, bleached zone and mineralized reduced zone. Chalcocite and pyrite are the main ore minerals at the Hamzelou deposit. Malachite, azurite, covellite, atacamite, goethite and hematite are formed during supergene processes. Comparison of Chondrite normalized trace elements and REE patterns of barren red and grey host sandstones and mineralized samples indicate that mineralized samples show lower concentrations of trace elements and REE relative to host rocks. This signature indicate mobility of these elements during bleaching and mineralization processes. Based on tectonic setting, petrography, stratigraphy, mineralogy, ore structure and texture, and ore controlling factors (presence of plant fossils, salt domes, porosity and permeability of host rocks, faults and fractures), the Hamzelou deposit is a sedimenthosted Redbed type Cu deposit and is comparable with other Redbed type Cu deposits of the Mahneshan area. These deposits have close spatial relationship with evaporites and salt domes in the Upper Red Formation that must be investigated during exploration studies.