Scheelite-pyroxene-chalcopyrite-pyrite skarn (Chorukh-Dairon Deposit, Late Pennsylvanian to earliest Permian, ~298-306 Ma; Chorukh-Dairon Mine, Tajikistan) 1 : 無料・フリー素材/写真
Scheelite-pyroxene-chalcopyrite-pyrite skarn (Chorukh-Dairon Deposit, Late Pennsylvanian to earliest Permian, ~298-306 Ma; Chorukh-Dairon Mine, Tajikistan) 1 / James St. John
| ライセンス | クリエイティブ・コモンズ 表示 2.1 |
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| 説明 | Skarn from the Late Paleozoic of Tajikistan. (~5.5 centimeters across at its widest)Skarn is a crystalline-textured, contact metamorphic rock. It forms by heating and addition of elements (metasomatism) to country rock in the immediate vicinity of an igneous intrusion (batholith, stock, sill, dike, laccolith). The mineralogy of skarns is highly variable, depending on the chemistries of the host rock and the intruding magma.The skarn sample seen here is from Tajikistan's Chorukh-Dairon Deposit, which was mined for decades for its tungsten (W), molybdenum (Mo), and copper (Cu) content. Those elements are present in the minerals scheelite, molybdenite, and chalcopyrite. This specimen has scheelite, pyroxene, chalcopyrite, and pyrite. The deposit is considered a "calcareous infiltration skarn" and is hosted in Late Paleozoic-aged, mafic to felsic, intrusive igneous rocks - most are intermediate in composition.Geologic unit: Chorukh-Dairon W-Mo Skarn Deposit, Late Pennsylvanian to earliest Permian ~298-306 MaLocality: Chorukh-Dairon Mine, near the town of Chorukh-Dairon, Ghafurov District, Sughd Province, Middle Tien Shan Mountains, far-northern Tajikistan (apparently in the vicinity of 40° 23' 46.27" North latitude, 69° 40' 51.17" East longitude)--------------------------------------Site-specific info. synthesized from:Soloviev & Kryazhev (2017) - Geology, mineralization, and fluid inclusion characteristics of the Chorukh-Dairon W-Mo-Cu skarn deposit in the Middle Tien Shan, northern Tajikistan. Ore Geology Reviews 80: 79-102. |
| 撮影日 | 2021-09-07 17:41:15 |
| 撮影者 | James St. John |
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