Alkaline rocks and carbonatites of Amba Dongar and adjacent areas, Deccan Igneous Province, Gujarat, India: 1. Geology, petrography and petrochemistry
Identifieur interne : 00D920 ( Main/Exploration ); précédent : 00D919; suivant : 00D921Alkaline rocks and carbonatites of Amba Dongar and adjacent areas, Deccan Igneous Province, Gujarat, India: 1. Geology, petrography and petrochemistry
Auteurs : L. G. Gwalani [Inde] ; N. M. S. Rock [Australie] ; W. J. Chang [Australie] ; S. Fernandez [Espagne] ; C. J. Allégre [France] ; A. Prinzhofer [France]Source :
- Mineralogy and Petrology [ 0930-0708 ] ; 1993-06-01.
Descripteurs français
- Wicri :
- topic : Pétrologie.
English descriptors
- KwdEn :
- Adjacent areas, Aegirine, Alkaline, Alkaline rocks, Alkaline series, Alkaline suite, Amba, Amba dongar, Amphibole, Analytical methods, Augite, Avasia, Basalt, Breccia, Bull geol, Calcite, Carbonatite, Carbonatites, Chhota, Chhota udaipur, Chhota udaipur subprovince, Deccan, Deccan basalts, Deccan trap, Deccan traps, Dongar, Dyke, Dyke trachytic trachyte, Earth planet, Feldspar, Feldspar fractionation, Fenites, Fluorite, Fracture zones, Gabbro, Geol, Groundmass, Groundmass plagioclase, Gujarat, Gujarat state, Gwalani, Igneous rocks, Incompatible elements, India sukheswala, Institut physique, Intrusion, Isotope, Iugs, Iugs recommendations, Lamprophyres, Late dykes, Late suite, Limestone, Mafic minerals, Magma, Magmatism, Mata, Nepheline, Nephelinite, Petrology, Phenai, Phenai mata, Phenocrysts, Phonolitic, Phonolitic nephelinites, Picrite, Picrite basalt, Picrite basalts, Plagioclase, Plagioclase laths, Porphyritic, Pseudoleucite, Pyroxene, Rbbath, Rbbath tanbce, Sandstone, Sethna, Silicate, Subprovince, Sukheswala, Syenite, Tanbce, Tephriphonolite, Tephrites, Tholeiitic, Tholeiitic series, Tinguaites, Trace element data, Trace elements, Trachyte, Trachytic, Trachytic rocks, Trachytic suite, Uda, Udaipur, Undersaturated, Viladkar, Western australia.
- Teeft :
- Adjacent areas, Aegirine, Alkaline, Alkaline rocks, Alkaline series, Alkaline suite, Amba, Amba dongar, Amphibole, Analytical methods, Augite, Avasia, Basalt, Breccia, Bull geol, Calcite, Carbonatite, Carbonatites, Chhota, Chhota udaipur, Chhota udaipur subprovince, Deccan, Deccan basalts, Deccan trap, Deccan traps, Dongar, Dyke, Dyke trachytic trachyte, Earth planet, Feldspar, Feldspar fractionation, Fenites, Fluorite, Fracture zones, Gabbro, Geol, Groundmass, Groundmass plagioclase, Gujarat, Gujarat state, Gwalani, Igneous rocks, Incompatible elements, India sukheswala, Institut physique, Intrusion, Isotope, Iugs, Iugs recommendations, Lamprophyres, Late dykes, Late suite, Limestone, Mafic minerals, Magma, Magmatism, Mata, Nepheline, Nephelinite, Petrology, Phenai, Phenai mata, Phenocrysts, Phonolitic, Phonolitic nephelinites, Picrite, Picrite basalt, Picrite basalts, Plagioclase, Plagioclase laths, Porphyritic, Pseudoleucite, Pyroxene, Rbbath, Rbbath tanbce, Sandstone, Sethna, Silicate, Subprovince, Sukheswala, Syenite, Tanbce, Tephriphonolite, Tephrites, Tholeiitic, Tholeiitic series, Tinguaites, Trace element data, Trace elements, Trachyte, Trachytic, Trachytic rocks, Trachytic suite, Uda, Udaipur, Undersaturated, Viladkar, Western australia.
Abstract
Summary: Rift-related, late Eocene (≈ 60 Ma) alkaline-carbonatitec intrusions cover ≈ 1200 km2 south of the town of Chhota Udaipur, and form a subprovince within the alkaline magmatism that accompanies the tholeiitic Deccan Traps. They were emplaced temporally between late Deccan Trap flows and late dykes of basalt and picritic basalt. The subprovince comprises five main geographic occurrences (sectors): (1)Amba Dongar: a ring-complex of Ca-Mg-Fe-carbonatites, nephelinites to tephriphonolites, and fluorite deposits; (2)Siriwasan-Dugdha: an intrusive complex of Ca—carbonatites, nephelinites and trachytic rocks; (3)Phenai Mata: a nepheline syenite plug and dykes, plus dykes of tephrites to phonolites and lamprophyres (intimately associated with a layered tholeiitic gabbro—granophyre intrusion); (4)Panwad-Kawant: dykes and plugs of lamprophyres and tephrites to phonolites; (5)Bakhatgarh-Phulmahal: late basic-ultrabasic dykes only. The alkaline rocks range from ultrasodic to ultrapotassic, but are mostly nonperalkaline. Silica-undersaturated examples show higher incompatible and LIL element contents (Rb, K, Nb, Zr, Sr, Ba, LREE, etc.) than the associated tholeiites. However, the late basic-ultrabasic dykes display an continuum of alkaline-tholeiitic compositions. Possible parent magmas are represented among the primitive undersaturated basic dykes (including lamprophyres). The trachytic rocks are subalkaline, and may be genetically related to a tholeiitic rather than alkaline parent magma.
Url:
DOI: 10.1007/BF01161569
Affiliations:
- Australie, Espagne, France, Inde
- Australie-Occidentale, Communauté de Madrid, Île-de-France
- Madrid, Paris
- Université complutense de Madrid
Links toward previous steps (curation, corpus...)
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- to stream Istex, to step Checkpoint: 002A35
- to stream Main, to step Merge: 00EB41
- to stream Main, to step Curation: 00D920
Le document en format XML
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<term>Aegirine</term>
<term>Alkaline</term>
<term>Alkaline rocks</term>
<term>Alkaline series</term>
<term>Alkaline suite</term>
<term>Amba</term>
<term>Amba dongar</term>
<term>Amphibole</term>
<term>Analytical methods</term>
<term>Augite</term>
<term>Avasia</term>
<term>Basalt</term>
<term>Breccia</term>
<term>Bull geol</term>
<term>Calcite</term>
<term>Carbonatite</term>
<term>Carbonatites</term>
<term>Chhota</term>
<term>Chhota udaipur</term>
<term>Chhota udaipur subprovince</term>
<term>Deccan</term>
<term>Deccan basalts</term>
<term>Deccan trap</term>
<term>Deccan traps</term>
<term>Dongar</term>
<term>Dyke</term>
<term>Dyke trachytic trachyte</term>
<term>Earth planet</term>
<term>Feldspar</term>
<term>Feldspar fractionation</term>
<term>Fenites</term>
<term>Fluorite</term>
<term>Fracture zones</term>
<term>Gabbro</term>
<term>Geol</term>
<term>Groundmass</term>
<term>Groundmass plagioclase</term>
<term>Gujarat</term>
<term>Gujarat state</term>
<term>Gwalani</term>
<term>Igneous rocks</term>
<term>Incompatible elements</term>
<term>India sukheswala</term>
<term>Institut physique</term>
<term>Intrusion</term>
<term>Isotope</term>
<term>Iugs</term>
<term>Iugs recommendations</term>
<term>Lamprophyres</term>
<term>Late dykes</term>
<term>Late suite</term>
<term>Limestone</term>
<term>Mafic minerals</term>
<term>Magma</term>
<term>Magmatism</term>
<term>Mata</term>
<term>Nepheline</term>
<term>Nephelinite</term>
<term>Petrology</term>
<term>Phenai</term>
<term>Phenai mata</term>
<term>Phenocrysts</term>
<term>Phonolitic</term>
<term>Phonolitic nephelinites</term>
<term>Picrite</term>
<term>Picrite basalt</term>
<term>Picrite basalts</term>
<term>Plagioclase</term>
<term>Plagioclase laths</term>
<term>Porphyritic</term>
<term>Pseudoleucite</term>
<term>Pyroxene</term>
<term>Rbbath</term>
<term>Rbbath tanbce</term>
<term>Sandstone</term>
<term>Sethna</term>
<term>Silicate</term>
<term>Subprovince</term>
<term>Sukheswala</term>
<term>Syenite</term>
<term>Tanbce</term>
<term>Tephriphonolite</term>
<term>Tephrites</term>
<term>Tholeiitic</term>
<term>Tholeiitic series</term>
<term>Tinguaites</term>
<term>Trace element data</term>
<term>Trace elements</term>
<term>Trachyte</term>
<term>Trachytic</term>
<term>Trachytic rocks</term>
<term>Trachytic suite</term>
<term>Uda</term>
<term>Udaipur</term>
<term>Undersaturated</term>
<term>Viladkar</term>
<term>Western australia</term>
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<term>Aegirine</term>
<term>Alkaline</term>
<term>Alkaline rocks</term>
<term>Alkaline series</term>
<term>Alkaline suite</term>
<term>Amba</term>
<term>Amba dongar</term>
<term>Amphibole</term>
<term>Analytical methods</term>
<term>Augite</term>
<term>Avasia</term>
<term>Basalt</term>
<term>Breccia</term>
<term>Bull geol</term>
<term>Calcite</term>
<term>Carbonatite</term>
<term>Carbonatites</term>
<term>Chhota</term>
<term>Chhota udaipur</term>
<term>Chhota udaipur subprovince</term>
<term>Deccan</term>
<term>Deccan basalts</term>
<term>Deccan trap</term>
<term>Deccan traps</term>
<term>Dongar</term>
<term>Dyke</term>
<term>Dyke trachytic trachyte</term>
<term>Earth planet</term>
<term>Feldspar</term>
<term>Feldspar fractionation</term>
<term>Fenites</term>
<term>Fluorite</term>
<term>Fracture zones</term>
<term>Gabbro</term>
<term>Geol</term>
<term>Groundmass</term>
<term>Groundmass plagioclase</term>
<term>Gujarat</term>
<term>Gujarat state</term>
<term>Gwalani</term>
<term>Igneous rocks</term>
<term>Incompatible elements</term>
<term>India sukheswala</term>
<term>Institut physique</term>
<term>Intrusion</term>
<term>Isotope</term>
<term>Iugs</term>
<term>Iugs recommendations</term>
<term>Lamprophyres</term>
<term>Late dykes</term>
<term>Late suite</term>
<term>Limestone</term>
<term>Mafic minerals</term>
<term>Magma</term>
<term>Magmatism</term>
<term>Mata</term>
<term>Nepheline</term>
<term>Nephelinite</term>
<term>Petrology</term>
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<term>Phenai mata</term>
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<term>Plagioclase laths</term>
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<term>Silicate</term>
<term>Subprovince</term>
<term>Sukheswala</term>
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<term>Tephriphonolite</term>
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<term>Tholeiitic</term>
<term>Tholeiitic series</term>
<term>Tinguaites</term>
<term>Trace element data</term>
<term>Trace elements</term>
<term>Trachyte</term>
<term>Trachytic</term>
<term>Trachytic rocks</term>
<term>Trachytic suite</term>
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<term>Udaipur</term>
<term>Undersaturated</term>
<term>Viladkar</term>
<term>Western australia</term>
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<front><div type="abstract" xml:lang="en">Summary: Rift-related, late Eocene (≈ 60 Ma) alkaline-carbonatitec intrusions cover ≈ 1200 km2 south of the town of Chhota Udaipur, and form a subprovince within the alkaline magmatism that accompanies the tholeiitic Deccan Traps. They were emplaced temporally between late Deccan Trap flows and late dykes of basalt and picritic basalt. The subprovince comprises five main geographic occurrences (sectors): (1)Amba Dongar: a ring-complex of Ca-Mg-Fe-carbonatites, nephelinites to tephriphonolites, and fluorite deposits; (2)Siriwasan-Dugdha: an intrusive complex of Ca—carbonatites, nephelinites and trachytic rocks; (3)Phenai Mata: a nepheline syenite plug and dykes, plus dykes of tephrites to phonolites and lamprophyres (intimately associated with a layered tholeiitic gabbro—granophyre intrusion); (4)Panwad-Kawant: dykes and plugs of lamprophyres and tephrites to phonolites; (5)Bakhatgarh-Phulmahal: late basic-ultrabasic dykes only. The alkaline rocks range from ultrasodic to ultrapotassic, but are mostly nonperalkaline. Silica-undersaturated examples show higher incompatible and LIL element contents (Rb, K, Nb, Zr, Sr, Ba, LREE, etc.) than the associated tholeiites. However, the late basic-ultrabasic dykes display an continuum of alkaline-tholeiitic compositions. Possible parent magmas are represented among the primitive undersaturated basic dykes (including lamprophyres). The trachytic rocks are subalkaline, and may be genetically related to a tholeiitic rather than alkaline parent magma.</div>
</front>
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