Processing of exploration data in Zarshouran area, modeling of ore body and mineral resource estimation
Subject Areas :
Arash Gourabjeiri pour
1
(استادیار دانشگاه آزاد اسلامی واحد میانه)
Bahram Abolqasemi
2
(کارشناس ارشد اکتشاف شرکت مشاوران انرژی تهران)
Alireza Najafi
3
(کارشناس ارشد اکتشاف شرکت پارس کانی)
Mahnaz Taheri
4
(کارشناس ارشد پترولوژی شرکت پارس کانی)
Keywords: GIS, Kriging, Zarshouran, gold deposit, Carlin type gold deposit,
Abstract :
Zarshouran zone is located in South East of west Azerbayjan. From geological point of view this zone is a part ofAlborz-Azerbaijan zone and Precambrian hostrock forms the prevailing outcrop of Zarshouran zone which iscomposed of carbonates and acidic volcanic rocks to intermediate rocks. This sequence covered by sharpunconformity from red layers of Oligomiocene. The most important structure which effects in forming the oredeposit, is Imankhan anticline and the main structural features in Zarshouran ore deposit is ductile and brittlestructures and among these the main faults with the direction of North-West and South-East are probably inconnected with mineralization. Gold mineralization in this ore-deposit from different point of view is similar toepithermal mineralization in sedimentary rock especially in calcareous rocks (Carlin type gold deposit). Silicic,silicic argillic, sercitic-argillic and alunitic alteration are visible in the zone. The datas of different stages of thiszone have been gathered in GIS base and processed with Data mine Studio 3 software. At first 1427 geochemicalsamples were studied and the highest mineralization potential of the zone was specified and gold paragenesiseswere distinguished. Then based on drilled boreholes and statistical studies of datas sections and estimation spacewere specified and using the best method of estimation, ordinary kriging, and reservoir evaluation have beendone. Finally, based on different parts of mineral ore thicknesses and estimation error, the best drilling points forcomplementary survey of zone in the nets of 50,100,200 meters were specified.
