Fluid Inclusion Study of Quartz Xenocrysts in Mafic Dykes from Kawant Area, Chhota Udaipur District, Gujarat, India
Unusual mafic dykes occur in the proximity of the Ambadongar Carbonatite Complex, Lower Narmada Valley, Gujarat, India. The dykes contain dense population of quartz xenocrysts within the basaltic matrix metasomatised by carbonate-rich fluids. Plagioclase feldspars, relict pyroxenes, chlorite, barite...
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| Format: | Article |
| Language: | English |
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De Gruyter
2015-09-01
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| Series: | Open Geosciences |
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| Online Access: | https://doi.org/10.1515/geo-2015-0019 |
| _version_ | 1818731182156677120 |
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| author | Randive Kirtikumar Hurai Vratislav |
| author_facet | Randive Kirtikumar Hurai Vratislav |
| author_sort | Randive Kirtikumar |
| collection | DOAJ |
| description | Unusual mafic dykes occur in the proximity of the Ambadongar Carbonatite Complex, Lower Narmada Valley, Gujarat, India. The dykes contain dense population of quartz xenocrysts within the basaltic matrix metasomatised by carbonate-rich fluids. Plagioclase feldspars, relict pyroxenes, chlorite, barite, rutile, magnetite, Fe-Ti oxides and glass were identified in the basaltic matrix. Quartz xenocrysts occur in various shapes and sizes and form an intricate growth pattern with carbonates. The xenocrysts are fractured and contain several types of primary and secondary, single phase and two-phase fluid inclusions. The two-phase inclusions are dominated by aqueous liquid, whereas the monophase inclusions are composed of carbonic gas and the aqueous inclusions homogenize to liquid between 226°C and 361°C. Majority of the inclusions are secondary in origin and are therefore unrelated to the crystallization of quartz. Moreover, the inclusions have mixed carbonic-aqueous compositions that inhibit their direct correlation with the crustal or mantle fluids. The composition of dilute CO2-rich fluids observed in the quartz xenocrysts appear similar to those exsolved during the final stages of evolution of the Amba Dongar carbonatites. However, the carbonates are devoid of fluid inclusions and therefore their genetic relation with the quartz xenocrysts cannot be established. |
| first_indexed | 2024-12-17T23:13:36Z |
| format | Article |
| id | doaj.art-1c647ca17eaa465eb89aa07bc3e7ed8e |
| institution | Directory Open Access Journal |
| issn | 2391-5447 |
| language | English |
| last_indexed | 2024-12-17T23:13:36Z |
| publishDate | 2015-09-01 |
| publisher | De Gruyter |
| record_format | Article |
| series | Open Geosciences |
| spelling | doaj.art-1c647ca17eaa465eb89aa07bc3e7ed8e2022-12-21T21:29:03ZengDe GruyterOpen Geosciences2391-54472015-09-017110.1515/geo-2015-0019geo-2015-0019Fluid Inclusion Study of Quartz Xenocrysts in Mafic Dykes from Kawant Area, Chhota Udaipur District, Gujarat, IndiaRandive Kirtikumar0Hurai Vratislav1Post Graduate Department of Geology, RTM Nagpur University, Nagpur (MH) – 440 001, IndiaSlovak Academy of Sciences, Geological Institute, Dúbravská cesta 9, P.O.BOX 106, 840 05 Bratislava 45, SlovakiaUnusual mafic dykes occur in the proximity of the Ambadongar Carbonatite Complex, Lower Narmada Valley, Gujarat, India. The dykes contain dense population of quartz xenocrysts within the basaltic matrix metasomatised by carbonate-rich fluids. Plagioclase feldspars, relict pyroxenes, chlorite, barite, rutile, magnetite, Fe-Ti oxides and glass were identified in the basaltic matrix. Quartz xenocrysts occur in various shapes and sizes and form an intricate growth pattern with carbonates. The xenocrysts are fractured and contain several types of primary and secondary, single phase and two-phase fluid inclusions. The two-phase inclusions are dominated by aqueous liquid, whereas the monophase inclusions are composed of carbonic gas and the aqueous inclusions homogenize to liquid between 226°C and 361°C. Majority of the inclusions are secondary in origin and are therefore unrelated to the crystallization of quartz. Moreover, the inclusions have mixed carbonic-aqueous compositions that inhibit their direct correlation with the crustal or mantle fluids. The composition of dilute CO2-rich fluids observed in the quartz xenocrysts appear similar to those exsolved during the final stages of evolution of the Amba Dongar carbonatites. However, the carbonates are devoid of fluid inclusions and therefore their genetic relation with the quartz xenocrysts cannot be established.https://doi.org/10.1515/geo-2015-0019quartz xenocrystsmafic dykesamba dongarcarbonatitedeccan traps |
| spellingShingle | Randive Kirtikumar Hurai Vratislav Fluid Inclusion Study of Quartz Xenocrysts in Mafic Dykes from Kawant Area, Chhota Udaipur District, Gujarat, India Open Geosciences quartz xenocrysts mafic dykes amba dongar carbonatite deccan traps |
| title | Fluid Inclusion Study of Quartz Xenocrysts in Mafic Dykes from Kawant Area, Chhota Udaipur District, Gujarat, India |
| title_full | Fluid Inclusion Study of Quartz Xenocrysts in Mafic Dykes from Kawant Area, Chhota Udaipur District, Gujarat, India |
| title_fullStr | Fluid Inclusion Study of Quartz Xenocrysts in Mafic Dykes from Kawant Area, Chhota Udaipur District, Gujarat, India |
| title_full_unstemmed | Fluid Inclusion Study of Quartz Xenocrysts in Mafic Dykes from Kawant Area, Chhota Udaipur District, Gujarat, India |
| title_short | Fluid Inclusion Study of Quartz Xenocrysts in Mafic Dykes from Kawant Area, Chhota Udaipur District, Gujarat, India |
| title_sort | fluid inclusion study of quartz xenocrysts in mafic dykes from kawant area chhota udaipur district gujarat india |
| topic | quartz xenocrysts mafic dykes amba dongar carbonatite deccan traps |
| url | https://doi.org/10.1515/geo-2015-0019 |
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