The first identification of cronstedtite in Cu–Ni–PGE ores of the Talnakh intrusion
Abstract We present new mineralogical data of cronstedtite from the Southern-2 orebody, located in the South-Western branch of the Talnakh intrusion (Noril’sk area) composed of massive sulfides in which the total amount of oxides and silicates does not exceed 1–3 vol%. The petrographic and mineralog...
| Main Authors: | , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Nature Portfolio
2023-12-01
|
| Series: | Scientific Reports |
| Online Access: | https://doi.org/10.1038/s41598-023-49953-x |
| _version_ | 1797388408821121024 |
|---|---|
| author | T. Yu. Yakich E. S. Zhimuleva M. A. Rudmin A. S. Ruban P. N. Maximov M. V. Shaldybin |
| author_facet | T. Yu. Yakich E. S. Zhimuleva M. A. Rudmin A. S. Ruban P. N. Maximov M. V. Shaldybin |
| author_sort | T. Yu. Yakich |
| collection | DOAJ |
| description | Abstract We present new mineralogical data of cronstedtite from the Southern-2 orebody, located in the South-Western branch of the Talnakh intrusion (Noril’sk area) composed of massive sulfides in which the total amount of oxides and silicates does not exceed 1–3 vol%. The petrographic and mineralogical features of these ores indicated occurrence of fine-grained, fibrous needle like clusters < 50-µm-sized grains of cronstedtite (7.09 Å along its c-axis). This mineral confirmed by a number of analytical techniques (powder X-ray diffraction of balk samples, transmission electron microscopy, scanning electron microscopy, Raman and Infrared spectroscopy). Cronstedtite sporadically contains signals of Al, Ni, Ca and filling the cracks and cavities between sulfides of copper (chalcopyrite) and iron (pyrrhotite, pentlandite). In some cases, cronstedtite contains micron-sized PGM, and associates with magnetite. According the X-ray diffraction analysis of the bulk massive ores besides cronstendtite are established kaolinite, gypsum, calcite, quartz, and cristobalite. The findings of cronstedtite in Noril’sk area have never been mentioned publicly before. Its occurrence is the northernmost known locality in the world. Our results imply that the formation of cronstedtite in the Talnakh intrusion could be possible by the active participation low-temperatures fluids within the relatively near-surface (< 2 km of paleosurface) conditions of intrusion emplacement, in contrast to other deep-seated supergiant Cu–Ni–PGE deposits in the world. The conditions of formation in isolated cavities in fresh pyrrhotite-pentlandite-chalcopyrite massive ores of deep level of the Talnakh intrusion could be favorable for the formation of cronstendtite. |
| first_indexed | 2024-03-08T22:40:24Z |
| format | Article |
| id | doaj.art-681aa4da0c384ae78c9600d23e0dec9d |
| institution | Directory Open Access Journal |
| issn | 2045-2322 |
| language | English |
| last_indexed | 2024-03-08T22:40:24Z |
| publishDate | 2023-12-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Scientific Reports |
| spelling | doaj.art-681aa4da0c384ae78c9600d23e0dec9d2023-12-17T12:12:25ZengNature PortfolioScientific Reports2045-23222023-12-011311910.1038/s41598-023-49953-xThe first identification of cronstedtite in Cu–Ni–PGE ores of the Talnakh intrusionT. Yu. Yakich0E. S. Zhimuleva1M. A. Rudmin2A. S. Ruban3P. N. Maximov4M. V. Shaldybin5Division for Geology, School of Earth Sciences & Engineering, Tomsk Polytechnic UniversityDivision for Geology, School of Earth Sciences & Engineering, Tomsk Polytechnic UniversityDivision for Geology, School of Earth Sciences & Engineering, Tomsk Polytechnic UniversityDivision for Geology, School of Earth Sciences & Engineering, Tomsk Polytechnic UniversityDivision for Geology, School of Earth Sciences & Engineering, Tomsk Polytechnic UniversityDivision for Geology, School of Earth Sciences & Engineering, Tomsk Polytechnic UniversityAbstract We present new mineralogical data of cronstedtite from the Southern-2 orebody, located in the South-Western branch of the Talnakh intrusion (Noril’sk area) composed of massive sulfides in which the total amount of oxides and silicates does not exceed 1–3 vol%. The petrographic and mineralogical features of these ores indicated occurrence of fine-grained, fibrous needle like clusters < 50-µm-sized grains of cronstedtite (7.09 Å along its c-axis). This mineral confirmed by a number of analytical techniques (powder X-ray diffraction of balk samples, transmission electron microscopy, scanning electron microscopy, Raman and Infrared spectroscopy). Cronstedtite sporadically contains signals of Al, Ni, Ca and filling the cracks and cavities between sulfides of copper (chalcopyrite) and iron (pyrrhotite, pentlandite). In some cases, cronstedtite contains micron-sized PGM, and associates with magnetite. According the X-ray diffraction analysis of the bulk massive ores besides cronstendtite are established kaolinite, gypsum, calcite, quartz, and cristobalite. The findings of cronstedtite in Noril’sk area have never been mentioned publicly before. Its occurrence is the northernmost known locality in the world. Our results imply that the formation of cronstedtite in the Talnakh intrusion could be possible by the active participation low-temperatures fluids within the relatively near-surface (< 2 km of paleosurface) conditions of intrusion emplacement, in contrast to other deep-seated supergiant Cu–Ni–PGE deposits in the world. The conditions of formation in isolated cavities in fresh pyrrhotite-pentlandite-chalcopyrite massive ores of deep level of the Talnakh intrusion could be favorable for the formation of cronstendtite.https://doi.org/10.1038/s41598-023-49953-x |
| spellingShingle | T. Yu. Yakich E. S. Zhimuleva M. A. Rudmin A. S. Ruban P. N. Maximov M. V. Shaldybin The first identification of cronstedtite in Cu–Ni–PGE ores of the Talnakh intrusion Scientific Reports |
| title | The first identification of cronstedtite in Cu–Ni–PGE ores of the Talnakh intrusion |
| title_full | The first identification of cronstedtite in Cu–Ni–PGE ores of the Talnakh intrusion |
| title_fullStr | The first identification of cronstedtite in Cu–Ni–PGE ores of the Talnakh intrusion |
| title_full_unstemmed | The first identification of cronstedtite in Cu–Ni–PGE ores of the Talnakh intrusion |
| title_short | The first identification of cronstedtite in Cu–Ni–PGE ores of the Talnakh intrusion |
| title_sort | first identification of cronstedtite in cu ni pge ores of the talnakh intrusion |
| url | https://doi.org/10.1038/s41598-023-49953-x |
| work_keys_str_mv | AT tyuyakich thefirstidentificationofcronstedtiteincunipgeoresofthetalnakhintrusion AT eszhimuleva thefirstidentificationofcronstedtiteincunipgeoresofthetalnakhintrusion AT marudmin thefirstidentificationofcronstedtiteincunipgeoresofthetalnakhintrusion AT asruban thefirstidentificationofcronstedtiteincunipgeoresofthetalnakhintrusion AT pnmaximov thefirstidentificationofcronstedtiteincunipgeoresofthetalnakhintrusion AT mvshaldybin thefirstidentificationofcronstedtiteincunipgeoresofthetalnakhintrusion AT tyuyakich firstidentificationofcronstedtiteincunipgeoresofthetalnakhintrusion AT eszhimuleva firstidentificationofcronstedtiteincunipgeoresofthetalnakhintrusion AT marudmin firstidentificationofcronstedtiteincunipgeoresofthetalnakhintrusion AT asruban firstidentificationofcronstedtiteincunipgeoresofthetalnakhintrusion AT pnmaximov firstidentificationofcronstedtiteincunipgeoresofthetalnakhintrusion AT mvshaldybin firstidentificationofcronstedtiteincunipgeoresofthetalnakhintrusion |