STRATIFORM EXHALATIVE-VOLCANOGENIC TUNGSTEN (CU-ZN) MINERALIZATION IN CHAH-CALAP DEPOSIT AND ITS ORE-BEARING HORIZONS

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SHOLEH A.; RASTAD E.; BABAKHANI A.R.

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Journal: GEOSCIENCES Year:2007 | Volume:17 | Issue:65 Page(s): 80-99

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Title

STRATIFORM EXHALATIVE-VOLCANOGENIC TUNGSTEN (CU-ZN) MINERALIZATION IN CHAH-CALAP DEPOSIT AND ITS ORE-BEARING HORIZONS

Author(s)

SHOLEH A. | RASTAD E. | BABAKHANI A.R. | Issue Writer Certificate

Keywords

W (CU-ZN) DEPOSITQ3

UPPER TRIASSIC-JURASSIC VOLCANO-SEDIMENTARY SERIESQ3

EXHALATIVE-VOLCANOGENICQ3

STRATIFORMQ2

ORE-BEARING HORIZONSQ3

CHAH-CALAPQ3

BIRJANDQ2

Abstract

Chah-Calap W (Cu-Zn) deposit is located in Lut Block. It is a part of Central Iran Paleozoic platform which has been subjected to late Cimmerian orogenic movements. CHAH-CALAP ore- bearing volcano-sedimentary sequence of upper Triassic-Jurassic age was metamorphosed to green schist-lower amphibolite facies. This sequence includes siliceous meta-pellite, lower meta-felsic tuff, meta-limestone with meta-chert interlayers, (main mineralized horizon occurred at the base of it) alternation of micritic and sparitic limestone, upper meta-felsic tuff and mylonitic rhyolite. In meta-limestone, 3 facies were recognized, in which the mineralization corresponds only to meta-chert bearing facies. No intrusive body outcrops in the study area. Two NW-SE and NE-SW trending fault systems can be observed in CHAH-CALAP mining region.The STRATIFORM mineralization with layering and lenticular geometry has 2 kilometer length. Based on these investigations, six mineralized horizons can be distinguished in CHAH-CALAP volcano-sedimentary rocks: siliceous meta-pellite (ore horizon I), lower meta-felsic tuff (ore horizon II), calc-silicate layers, bands and lenses occurring at the contact between meta-limestone and lower meta-felsic tuff (ore horizon III), at the middle of meta-limestone layer (ore horizon IV) and at the upper contact between meta-limestone and upper meta-felsic tuff (ore horizon V) and mylonitic rhyolite host rocks (ore horizon VI). Main mineralized horizon in CHAH-CALAP occurred at the base of meta-cherty limestone, at lower contact between meta-carbonate and lower meta-felsic tuff. Regionally metamorphosed chert-bearing parts of meta-limestone, forming calc-silicate horizon, composed mainly of sparitic calcite, tremolite, actinolite, diopside, hedenbergite and grassular-rich garnet. Ore assemblage includes: scheelite, chalcopyrite, sphalerite, pyrite, arsenopyrite, pyrrhotite, covelite, bornite, chalcocite, azurite/malachite and iron-oxide/hydroxides having massive, disseminated, laminated, breccia like and open space filling textures. Tungsten mineralization in CHAH-CALAP is considered to be of distal syn-sedimentary-syn-diagenetic type with exhalative origin. Diagenetic processes lead to primary concentration of mineralization which later experienced remobilization and re-concentration during regional metamorphism.

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APA: Copy

SHOLEH, A., RASTAD, E., & BABAKHANI, A.R.. (2007). STRATIFORM EXHALATIVE-VOLCANOGENIC TUNGSTEN (CU-ZN) MINERALIZATION IN CHAH-CALAP DEPOSIT AND ITS ORE-BEARING HORIZONS. GEOSCIENCES, 17(65), 80-99. SID. https://sid.ir/paper/31621/en

Vancouver: Copy

SHOLEH A., RASTAD E., BABAKHANI A.R.. STRATIFORM EXHALATIVE-VOLCANOGENIC TUNGSTEN (CU-ZN) MINERALIZATION IN CHAH-CALAP DEPOSIT AND ITS ORE-BEARING HORIZONS. GEOSCIENCES[Internet]. 2007;17(65):80-99. Available from: https://sid.ir/paper/31621/en

IEEE: Copy

A. SHOLEH, E. RASTAD, and A.R. BABAKHANI, “STRATIFORM EXHALATIVE-VOLCANOGENIC TUNGSTEN (CU-ZN) MINERALIZATION IN CHAH-CALAP DEPOSIT AND ITS ORE-BEARING HORIZONS,” GEOSCIENCES, vol. 17, no. 65, pp. 80–99, 2007, [Online]. Available: https://sid.ir/paper/31621/en

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