Geology, geochemistry and genesis of the Darreh Amrood Pb (Ag) deposit in the Urumieh-Dokhtar magmatic arc, south of Ghohrood

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MOUSIVAND F.; HASHEMI F.; REZAEI KAHKHAEI MEHDI; PAKIZEH A.

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Journal: GEOSCIENCES Year:2020 | Volume:29 | Issue:114 Page(s): 259-268

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Title

Geology, geochemistry and genesis of the Darreh Amrood Pb (Ag) deposit in the Urumieh-Dokhtar magmatic arc, south of Ghohrood

Author(s)

MOUSIVAND F. | HASHEMI F. | REZAEI KAHKHAEI MEHDI | PAKIZEH A. | Issue Writer Certificate

Keywords

Darreh AmroodQ1

LeadQ1

GeochemistryQ2

VMSQ2

Urumieh-DokhtarQ2

Abstract

The Darreh Amrood Pb (Ag) deposit is located in south of Ghohrood, in the Urumieh-Dokhtar magmatic arc (UDMA). Host rockes to the deposit are Middle to Late Eocene grey-green siliceous tuff and crystal lithic tuff. Geometry of orebodies is stratabound, irregular, and semiconcordant to discordant to layering of the host rocks. Ore structures and textures are dominated by semi-massive to brecciated, banded and vein-veinlets. Main primary minerals are galena, pyrite and chalcopyrite, and secondary minerals are dominated by covelline, goethite and hematite. Gangue minerals are epidote, chlorite, sericite, clay minerals, quartz, calcite and barite. Wall rock alterations are dominated by epidote-chlorite and sericitic. The rare earth element (REE) pattern of ores is not similar to that of volcanic rocks in the footwall and hangingwall that is concordant with sub-seafloor replacement process for ore formation. Also Ce showed negative anomaly that can be attributed to Ce in the seawater. Also based on structural, stratigraphic, petrographic, textures, mineralogical, alteration and geochemical studies, it is inferred that the Pb (Ag) mineralization in the Darreh Amrood area occurred as bimodal felsic-or Kuroko-type volcanogenic massive sulfide (VMS) mineralization, and formed as sub-seafloor replacement. It should be noted that the Darreh Amrood deposit is the first recognition of base metal-rich and poor barite VMS mineralization in the UDMA.

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APA: Copy

MOUSIVAND, F., HASHEMI, F., REZAEI KAHKHAEI, MEHDI, & PAKIZEH, A.. (2020). Geology, geochemistry and genesis of the Darreh Amrood Pb (Ag) deposit in the Urumieh-Dokhtar magmatic arc, south of Ghohrood. GEOSCIENCES, 29(114 ), 259-268. SID. https://sid.ir/paper/31516/en

Vancouver: Copy

MOUSIVAND F., HASHEMI F., REZAEI KAHKHAEI MEHDI, PAKIZEH A.. Geology, geochemistry and genesis of the Darreh Amrood Pb (Ag) deposit in the Urumieh-Dokhtar magmatic arc, south of Ghohrood. GEOSCIENCES[Internet]. 2020;29(114 ):259-268. Available from: https://sid.ir/paper/31516/en

IEEE: Copy

F. MOUSIVAND, F. HASHEMI, MEHDI REZAEI KAHKHAEI, and A. PAKIZEH, “Geology, geochemistry and genesis of the Darreh Amrood Pb (Ag) deposit in the Urumieh-Dokhtar magmatic arc, south of Ghohrood,” GEOSCIENCES, vol. 29, no. 114 , pp. 259–268, 2020, [Online]. Available: https://sid.ir/paper/31516/en

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