Petrology and U-Pb zircon dating of intrusive rocks from A, C-south, and Dardvay districts, Sangan iron stone mine, Khaf
Sangan magnetite skarn mine is located 300 km southeast of Mashhad, along the eastern part of Khaf-Drouneh volcanic-plutonic belt. Granitoids from three areas within the Sangan mine A, C-North and Dardvay were studied. Within the study area, three intrusive rocks including biotite-hornblende monzoni...
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Ferdowsi University of Mashhad
2013-10-01
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| Series: | Journal of Economic Geology |
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| Online Access: | http://econg.um.ac.ir/index.php/econg/article/view/31716 |
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| author | Abbas Golmohammadi Mohammad Hassan Karimpour Azadeh Malekzadeh Shafaroudi Seyed Ahamad Mazaheri |
| author_facet | Abbas Golmohammadi Mohammad Hassan Karimpour Azadeh Malekzadeh Shafaroudi Seyed Ahamad Mazaheri |
| author_sort | Abbas Golmohammadi |
| collection | DOAJ |
| description | Sangan magnetite skarn mine is located 300 km southeast of Mashhad, along the eastern part of Khaf-Drouneh volcanic-plutonic belt. Granitoids from three areas within the Sangan mine A, C-North and Dardvay were studied. Within the study area, three intrusive rocks including biotite-hornblende monzonite porphyry, biotite syenite and syenogranite were recognized. Based on field cross cutting, absence of garnet-magnetite skarn around the contact, and alteration by younger hydrothermal fluids, these granitoids are older than the magnetite skarn. U-Pb zircon age of the granitoid is 42 Ma (Middle Eocene). Magnetic susceptibility of the granitoids are 310-900 × 10-5 (SI units) and therefore, they are classified as belonging to the magnetite-series (oxidant type) I-type. Chemically, these granitoids are metaluminous, alkali-calcic to alkali and shoshonite to ultrapotassic. Enrichment of LREE, relative to HREE and enrichment of LILE (Sr, Cs, Rb, K and Ba) relative to HFSE (Nb, Ta, Ti, Hf and Zr) indicate that the magma formed in island arc setting. This magma originated from low partial melting (<1%) of garnet-spinel lherzolite (low garnet) and was contaminated in the continental crust. Based on the ratio of (La/Yb)N 6.23-34.73, indicate that small amount of garnet was left in the source rock. High ration of Rb/Sr, LILE/HFSE and high content of K2O, Th and Nb indicative of continental crust contamination. Petrognesis and geochronology of Sangan granitoid will help to know more about tectonomagmatic of Khaf-Kashmar-Drouneh volcanic-plutonic belt and their mineralization. |
| first_indexed | 2024-12-18T23:41:41Z |
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| id | doaj.art-83b0ed39022a440b880e862b40ac4db5 |
| institution | Directory Open Access Journal |
| issn | 2008-7306 |
| language | fas |
| last_indexed | 2024-12-18T23:41:41Z |
| publishDate | 2013-10-01 |
| publisher | Ferdowsi University of Mashhad |
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| series | Journal of Economic Geology |
| spelling | doaj.art-83b0ed39022a440b880e862b40ac4db52022-12-21T20:47:21ZfasFerdowsi University of MashhadJournal of Economic Geology2008-73062013-10-0152155175Petrology and U-Pb zircon dating of intrusive rocks from A, C-south, and Dardvay districts, Sangan iron stone mine, KhafAbbas Golmohammadi0Mohammad Hassan Karimpour1Azadeh Malekzadeh Shafaroudi2Seyed Ahamad Mazaheri3Ph.D student in Economic Geology, Ferdowsi University of Mashhad, IranResearch Center for Ore Deposits of Eastern Iran, Ferdowsi University of Mashhad, IranResearch Center for Ore Deposits of Eastern Iran, Ferdowsi University of Mashhad, IranResearch Center for Ore Deposits of Eastern Iran, Ferdowsi University of Mashhad, IranSangan magnetite skarn mine is located 300 km southeast of Mashhad, along the eastern part of Khaf-Drouneh volcanic-plutonic belt. Granitoids from three areas within the Sangan mine A, C-North and Dardvay were studied. Within the study area, three intrusive rocks including biotite-hornblende monzonite porphyry, biotite syenite and syenogranite were recognized. Based on field cross cutting, absence of garnet-magnetite skarn around the contact, and alteration by younger hydrothermal fluids, these granitoids are older than the magnetite skarn. U-Pb zircon age of the granitoid is 42 Ma (Middle Eocene). Magnetic susceptibility of the granitoids are 310-900 × 10-5 (SI units) and therefore, they are classified as belonging to the magnetite-series (oxidant type) I-type. Chemically, these granitoids are metaluminous, alkali-calcic to alkali and shoshonite to ultrapotassic. Enrichment of LREE, relative to HREE and enrichment of LILE (Sr, Cs, Rb, K and Ba) relative to HFSE (Nb, Ta, Ti, Hf and Zr) indicate that the magma formed in island arc setting. This magma originated from low partial melting (<1%) of garnet-spinel lherzolite (low garnet) and was contaminated in the continental crust. Based on the ratio of (La/Yb)N 6.23-34.73, indicate that small amount of garnet was left in the source rock. High ration of Rb/Sr, LILE/HFSE and high content of K2O, Th and Nb indicative of continental crust contamination. Petrognesis and geochronology of Sangan granitoid will help to know more about tectonomagmatic of Khaf-Kashmar-Drouneh volcanic-plutonic belt and their mineralization.http://econg.um.ac.ir/index.php/econg/article/view/31716Petrology of intrusive rocksZircon datingAC-southand Dardvay districtsSangan mineand Dardvay districts |
| spellingShingle | Abbas Golmohammadi Mohammad Hassan Karimpour Azadeh Malekzadeh Shafaroudi Seyed Ahamad Mazaheri Petrology and U-Pb zircon dating of intrusive rocks from A, C-south, and Dardvay districts, Sangan iron stone mine, Khaf Journal of Economic Geology Petrology of intrusive rocks Zircon dating A C-south and Dardvay districts Sangan mine and Dardvay districts |
| title | Petrology and U-Pb zircon dating of intrusive rocks from A, C-south, and Dardvay districts, Sangan iron stone mine, Khaf |
| title_full | Petrology and U-Pb zircon dating of intrusive rocks from A, C-south, and Dardvay districts, Sangan iron stone mine, Khaf |
| title_fullStr | Petrology and U-Pb zircon dating of intrusive rocks from A, C-south, and Dardvay districts, Sangan iron stone mine, Khaf |
| title_full_unstemmed | Petrology and U-Pb zircon dating of intrusive rocks from A, C-south, and Dardvay districts, Sangan iron stone mine, Khaf |
| title_short | Petrology and U-Pb zircon dating of intrusive rocks from A, C-south, and Dardvay districts, Sangan iron stone mine, Khaf |
| title_sort | petrology and u pb zircon dating of intrusive rocks from a c south and dardvay districts sangan iron stone mine khaf |
| topic | Petrology of intrusive rocks Zircon dating A C-south and Dardvay districts Sangan mine and Dardvay districts |
| url | http://econg.um.ac.ir/index.php/econg/article/view/31716 |
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