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| Format: | Artículo científico |
| Language: | en |
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Universitat de Barcelona
2007
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| Online Access: | https://www.redalyc.org/articulo.oa?id=50550304 |
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| _version_ | 1866811759666397184 |
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| author | Mokhles K. Azer |
| author_facet | Mokhles K. Azer |
| contents | Tectonic significance of Late Precambrian calc-alkaline and alkaline magmatism in Saint Katherina Area, Southern Sinai, Egypt Mokhles K. Azer Ciencias de la Tierra Rutig Katherina Magma mixing type granite Two magmatic rock suites are distinguished in the Late Precambrian basement of the Southern Sinai (NW Arabian-Nubian Shield, Egypt), namely (a) a calc-alkaline suite, and (b) an alkaline suite. The former includesRutig Volcanics, quartz-diorite, quartz-monzonite and monzogranite, while the latter includes Katherina Volcanicsand A-type granites. The minerals and textural features (kink, decussate and foliated textures) of thequartz-diorite reveal that it was subjected to deformation and thermal metamorphism. The Rutig Volcanics andquartz-diorite represent subduction related I-type magma, generated from anatexis of older crust with contributionof mantle-wedge magma. The quartz-monzonite and monzogranite are evolved from hybrid magma due toinjection of the partly crystallized granitic magma by more basic melts. The mineralogical and geochemicalcharacteristics of these granites indicate a mildly alkaline character and belonging to transitional magma typeon the borderline between the calc-alkaline and alkaline magma. The mafic microgranular enclaves (MME) inthe quartz-monzonite and monzogranite represent cooled globules from a dioritic magma mingled with the partlycrystalline granitic magma. The association of rapakivi texture with the MME confirms the genetic linkbetween the rapakivi texture and magma mixing. The overall characteristics of the Katherina Volcanics and Atypegranite are consistent with within-plate tectonic setting. The Katherina Volcanics are derived from a crustalsource with a mantle contribution, whereas A-type granites represent residual melts derived from deeper magmachamber through extreme fractional crystallization process 2007 artículo científico 1695-6133 https://www.redalyc.org/articulo.oa?id=50550304 en http://www.redalyc.org/revista.oa?id=505 Geologica Acta: an international earth science journal application/pdf Universitat de Barcelona Geologica Acta: an international earth science journal (España) Num.3 Vol.5 |
| format | Artículo científico |
| id | redalyc_50550304 |
| language | en |
| publishDate | 2007 |
| publisher | Universitat de Barcelona |
| spellingShingle | Tectonic significance of Late Precambrian calc-alkaline and alkaline magmatism in Saint Katherina Area, Southern Sinai, Egypt Mokhles K. Azer Ciencias de la Tierra Rutig Katherina Magma mixing type granite Tectonic significance of Late Precambrian calc-alkaline and alkaline magmatism in Saint Katherina Area, Southern Sinai, Egypt Mokhles K. Azer Ciencias de la Tierra Rutig Katherina Magma mixing type granite Two magmatic rock suites are distinguished in the Late Precambrian basement of the Southern Sinai (NW Arabian-Nubian Shield, Egypt), namely (a) a calc-alkaline suite, and (b) an alkaline suite. The former includesRutig Volcanics, quartz-diorite, quartz-monzonite and monzogranite, while the latter includes Katherina Volcanicsand A-type granites. The minerals and textural features (kink, decussate and foliated textures) of thequartz-diorite reveal that it was subjected to deformation and thermal metamorphism. The Rutig Volcanics andquartz-diorite represent subduction related I-type magma, generated from anatexis of older crust with contributionof mantle-wedge magma. The quartz-monzonite and monzogranite are evolved from hybrid magma due toinjection of the partly crystallized granitic magma by more basic melts. The mineralogical and geochemicalcharacteristics of these granites indicate a mildly alkaline character and belonging to transitional magma typeon the borderline between the calc-alkaline and alkaline magma. The mafic microgranular enclaves (MME) inthe quartz-monzonite and monzogranite represent cooled globules from a dioritic magma mingled with the partlycrystalline granitic magma. The association of rapakivi texture with the MME confirms the genetic linkbetween the rapakivi texture and magma mixing. The overall characteristics of the Katherina Volcanics and Atypegranite are consistent with within-plate tectonic setting. The Katherina Volcanics are derived from a crustalsource with a mantle contribution, whereas A-type granites represent residual melts derived from deeper magmachamber through extreme fractional crystallization process 2007 artículo científico 1695-6133 https://www.redalyc.org/articulo.oa?id=50550304 en http://www.redalyc.org/revista.oa?id=505 Geologica Acta: an international earth science journal application/pdf Universitat de Barcelona Geologica Acta: an international earth science journal (España) Num.3 Vol.5 |
| title | Tectonic significance of Late Precambrian calc-alkaline and alkaline magmatism in Saint Katherina Area, Southern Sinai, Egypt |
| topic | Ciencias de la Tierra Rutig Katherina Magma mixing type granite |
| url | https://www.redalyc.org/articulo.oa?id=50550304 |