University of Isfahan Petrological Journal 2228-5210 12 1 2021 05 22 Geological and genetical characteristics of Agates in Ferdows area (south Khorasan) Geological and genetical characteristics of Agates in Ferdows area (south Khorasan) 41 62 24959 10.22108/ijp.2020.123295.1182 FA Hesam Khakzad Shahid Beheshti University, Shahid Shahriari Square, Daneshjou Boulevard, Shahid Chamran Highway, Tehran, Iran Mohammad Rahgoshay Shahid Beheshti University, Shahid Shahriari Square, Daneshjou Boulevard, Shahid Chamran Highway, Tehran, Iran Javad Mehdipour Ghazi Earth Sciences Facility, Shahid Beheshti University, Tehran Journal Article 2020 06 07 Agates of the Ferdows area (north of Lut Block) occurred in open space and cracks filling form in the Paleogene volcanic rocks. These rocks are found as red, smoky, blue, violet, green, and colorless and as a vein, mosaic, geode, banded, stellar, cauliflower, moss, and circular fabrics. The altered host rocks’ fragments as enclave occurred within agates without reaction rims. Fluid inclusion studies on some of the agates show arrange of homogenization temperature from 102 to 233 ℃ and salinities from 2 to 11 wt% NaCl equiv. The REE contents of these rocks are low, only the vein-type agates were analyzed for all REEs. Most of the studied agates display Eu negative anomaly and positive Yb anomaly in REE normalized pattern along with   Agates of the Ferdows area (north of Lut Block) occurred in open space and cracks filling form in the Paleogene volcanic rocks. These rocks are found as red, smoky, blue, violet, green, and colorless and as a vein, mosaic, geode, banded, stellar, cauliflower, moss, and circular fabrics. The altered host rocks’ fragments as enclave occurred within agates without reaction rims. Fluid inclusion studies on some of the agates show arrange of homogenization temperature from 102 to 233 ℃ and salinities from 2 to 11 wt% NaCl equiv. The REE contents of these rocks are low, only the vein-type agates were analyzed for all REEs. Most of the studied agates display Eu negative anomaly and positive Yb anomaly in REE normalized pattern along with   https://ijp.ui.ac.ir/article_24959_294df8e96afda4fd194571e995089b34.pdf