Analyzing hydrothermal alteration and favorable zone of mineralization related Gholan intrusion body with using ETM & ASTER data

Category Tectonic & Seismotectonic
Group GSI.IR
Location The 25 Symposium of Geosciences
Author M.Buloki-R.Naghi zadeh-M.A.A.Mokhtari-S.Abbasi
Holding Date 02 July 2007
 

Analyzing hydrothermal alteration and favorable zone of mineralization related Gholan intrusion body with using ETM & ASTER data

The study area is situated 70 km west of Ahar, in siyahrud 1:100000 sheet. The area is comprises of Eocene volcanic rocks as andesit, dacite, volcanic breccia, basic tuff and volcanic-sedimentary units.

Post Eocene magmatism had been played important roles in Siyahrud area, which results of these processes had caused Oligocene plutonism and volcanic activities.

The intrusion of Oligocene body in various faces caused to the alteration and mineralization as cupper, molybdenum, gold and iron in the study area.

Granitic rocks (Og) with component of diorite to granite have been influenced by hydrothermal fluids, and hydrothermal alteration zones are seen in various areas.

IN this paper in order to recognition of hydrothermal alteration zone as an exploration tools, has used from ASTER & ATM data. Alteration mapping has used from band ratio and principal component analysis methods. The result of this studies and field studies lead to introducing the great hydrothermal alteration zone (this zone is in NW-SE direction, from Avansar to Nojeh mehr village).  In addition, an important favorable zone presented, which is important mineralization zone for precious metals, iron and cupper.

Keyword: mineralization- Cu, Au, Fe – Gholan granite- Siyahrud- Alteration- ETM-ASTER-band ratio- PCA

 

tags: QAZVIN