| Reference Type | Journal (article/letter/editorial) |
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| Title | Crystal Growth of Zircons in Puttetti Syenite: Nature of Fluids and Implications on CO2 Activity |
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| Journal | Journal of the Geological Society of India |
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| Authors | Santosh, M. | Author |
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| Year | 1985 (October) | Volume | 26 |
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| Page(s) | 695-703 | Issue | 10 |
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| Publisher | Geological Society of India | Place | Bangaluru, India |
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| Classification | Not set | LoC | Not set |
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| Mindat Ref. ID | 17755788 | Long-form Identifier | mindat:1:5:17755788:2 |
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| GUID | 0 |
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| Full Reference | Santosh, M. (1985) Crystal Growth of Zircons in Puttetti Syenite: Nature of Fluids and Implications on CO2 Activity. Journal of the Geological Society of India, 26 (10). 695-703 |
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| Plain Text | Santosh, M. (1985) Crystal Growth of Zircons in Puttetti Syenite: Nature of Fluids and Implications on CO2 Activity. Journal of the Geological Society of India, 26 (10). 695-703 |
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| In | (1985, October) Journal of the Geological Society of India Vol. 26 (10). Geological Society of India |
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| Abstract/Notes | Fluid inclusion studies in a number of doubly polished plates of zircons showing interesting features are documented. The equilibrium balanced shapes of inclusions and their pattern of distribution are suggestive of slow growth rate, largely controlIed by stacking mechanism, resulting in completed layerites. Development of tensional fractures which eventually healed by dendritic growth and typical necking-down textures of long tabular inclusions are recorded. Thermometric studies show tbat the early fluids were of high density (0.90-0.85 g/cm3)CO2 type with probable traces of CH4 and/or N2, entrapped at a pressure of 4.5 Kb. The fluids evolved into pure CO2 (O.83 - 0.68 g/cm3) and to mixed CO2-H2O around 650°C and 3.7 Kb due to formation of vapour phase, while a fraction of the melt was sti!l present. The composition of fluids recorded suggests repeated CO2 activity in south India with a peak during Late Precambrian-Early Palaeozoic times, effecting the generation and emplacement of alkaline plutons. |
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