Crystallization, Fractionation and Solidification of Co-Magmatic Alkaline Series Sequentially Emplaced in the Carbonatite Complex of Tiruppattur, Tamil Nadu, India

Ramasamy, R.

doi:10.5772/47991

Cited by 2 publications

(9 citation statements)

References 8 publications

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“…The carbonatite complex of Tiruppattur is associated with comagmatic soda and potash rich alkali syenites [4,12,15 ]. They are enriched with SO 3 , P 2 O 5 , CO 2 , F, Cl, O 2 and H 2 O.…”

Section: Discussionmentioning

confidence: 99%

“…On the other hand nodules aligned along synformly superimposed folded axial plane consisting of wollastonite and calcite are manifested without any significant concentration of sulphide minerals. The field relationship indicates that the skarn rock is formed along the contact between ultramafic rocks and garnetiferous orthoclase syenite [4,12,15]. Thin veins (in the range of 5-50 cm) of ankeritic and sovite carbonatites are also found within this skarn rock.…”

Section: Field Relationshipmentioning

confidence: 97%

“…The northern Sevvattur body shows irregular zonation and is comprised of cone-sheets of carbonatite body with a core of beforsite. Immediately south of the cone-sheets of carbonatite, an outer shell of speckled hornblende syenite is seen in the northern portion [4,12,15 ]. This is followed by a mottled porphyritic augite syenite which grades into a mottled augite syenite along its peripheral portions.…”

Section: Field Relationshipmentioning

confidence: 99%

“…The ultamafic rocks are essentially composed of pyroxenites and by intrusions of thin veins of oligoclasites, albitites and carbonatites in pyroxenite which transformed into mica-pyroxenites and hornblende-oligoclase-calcite bearing pyroxenite. The Jogipatti body with inward dips is composed of riebeckite syenite which grades into melanite-orthoclase syenite, melanite-microcline ultrapotassic syenite [4,12,15 ], wollastonite-melanite syenite, wollastonite-rock and melanite-wollastonite sovite. At the contact between melanite-wollastonite syenite and melanite-wollastonite sovite, scapolite-wollastonite syenite is developed.…”

Section: Field Relationshipmentioning

confidence: 99%

“…Both high field strength elements (K, Ba, Sr, Ti, P ) and incompatible elements (Zr, Hf, Nb, Ta, Y, Sc) concentrate in late magmatic fluids. After reaching required concentrations [15,16] of these elements, they form as discrete minerals of their own in residual magma. The peripheral portion of the galena sample collected is associated with well developed prismatic crystals of pyromorphite and wulframite of sizes varying from 1mm up to 5mm.…”

Section: Field Relationshipmentioning

confidence: 99%

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Mineralization of galena in an aplitic albitite from carbonatite complex of Tiruppattur, Tamil Nadu, India

2013

IOSR-JAGG

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A 10cmx10cmx10cm galena and associate albite from an aplitic albitite vein cutting across a skarn rock, near Garigaipalli village, in the carbonatite complex of Tiruppattur, Tamil Nadu, India were collected and studied for systematic variations in chemical composition from the central portions to outer peripheries. The compositions of albite grains show a linear trend of crystallizations from Ne 81 Ks 0 Qz 29 to Ne 48 Ks 0 Qz 52. Covariation diagrams of Pb-S, Na 2 O-PbO, (Ca+Na+K)-(Si+Ti+Al +3) and (Ca+Na+K)-S show sequences of crystallizations of albite and galena with miscibility gaps between them. These components in albite and galena negatively vary in opposite directions in these diagrams. Galena mineralization might have been initiated just after immiscible separation of sulphide phases from silicate phases but prior to initial crystallization of albite Tf3 at higher temperature. During the course of crystal growths under the influence of crystal field stabilization forces, mixed pattern of arrangement of individual early formed and late formed microcrystals together was taken place. Incorporations of volatiles into the voids of subsolidus crystal originated pits of galena and albite, play critical role on the increase of viscosity of residual magma and it depends upon the rate of cooling. Progressive depletion of Al, Na, K and S contents in sequentially crystallized albite and galena indicates that residual magma was enriched with these constituents and Si. After this co-magmatic differentiation the residual magma fractionated into silica oversaturated granitic magma as end product.

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“…The carbonatite complex of Tiruppattur is associated with comagmatic soda and potash rich alkali syenites [4,12,15 ]. They are enriched with SO 3 , P 2 O 5 , CO 2 , F, Cl, O 2 and H 2 O.…”

Section: Discussionmentioning

confidence: 99%

Section: Field Relationshipmentioning

confidence: 97%

Section: Field Relationshipmentioning

confidence: 99%

Section: Field Relationshipmentioning

confidence: 99%

Section: Field Relationshipmentioning

confidence: 99%

See 3 more Smart Citations

Mineralization of galena in an aplitic albitite from carbonatite complex of Tiruppattur, Tamil Nadu, India

2013

IOSR-JAGG

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Unveiling the petrogenesis of alkaline silicate rocks at the Sevattur Carbonatite Complex, India

Shinde,

Dey,

Bhattacharjee

et al. 2023

Preprint

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This study investigates the evolution of alkaline silicate rocks in the Southeast of the Sevattur Carbonatite Complex, intruding granite gneiss country rock. These rocks include monzodiorite, monzonite, syenite, albitite, and granite, alongside ultramafic enclaves known as pyroxene hornblendite. The present work unveils the intricate fractional crystallization processes within an alkali-rich basaltic magma system supported by mineralogical and geochemical studies. Mafic minerals such as diopside, pargasite, interstitial magnetite, and ilmenite indicate early cumulate textures forming at high temperatures. Amphibole and diopside alongside apatite inclusions suggest the presence of alkalis, fluorine, phosphorus and H2O in the primary magma. A coherent mineralogical and geochemical continuum from pyroxene hornblendite to monzodiorite, monzonite, and syenite with decreasing temperatures indicates fractional crystallization from a common primary magma. Furthermore, the absence of chilled margins and distinct boundaries dismisses a xenolithic origin for pyroxene hornblendite. The formation of granite, likely occurring during late-magmatic to hydrothermal stages, is characterized by K-feldspar, albite, and quartz, with clinozoisite and chlorite. Albitite occurrences as pegmatitic veins in syenite monzonite with shared geochemical traits with syenite and monzonite, suggesting a late-stage derivation from a common magma. Notably, these rocks lack the characteristic alkali-rich mineral assemblages, dispelling the notion of fenitization.

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Crystallization, Fractionation and Solidification of Co-Magmatic Alkaline Series Sequentially Emplaced in the Carbonatite Complex of Tiruppattur, Tamil Nadu, India

Cited by 2 publications

References 8 publications

Mineralization of galena in an aplitic albitite from carbonatite complex of Tiruppattur, Tamil Nadu, India

Mineralization of galena in an aplitic albitite from carbonatite complex of Tiruppattur, Tamil Nadu, India

Unveiling the petrogenesis of alkaline silicate rocks at the Sevattur Carbonatite Complex, India

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