Charnockites: Petrologic and phase equilibria …
This article reviews the petrology and formation conditions of charnockites, orthopyroxene-bearing granitoids, from various Precambrian high-grade metamorphic …
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Charnockite magmatism during a transitional phase: …
The charnockite suite shows compositional variation from monzogabbro through gabbroic diorite and diorite to monzodiorite. The charnockite is calc-alkaline and ferroan type with distinct enrichment in large ion lithophile elements and depletion in HREE. •
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Global type area charnockites in southern India
The charnockite shows compositional banding and is at places locally stretched and sheared. The dominant composition is biotite-bearing medium grained, quartz rich, garnet absent grayish charnockite. In some domains, coarse pegmatitic charnockite with cm sized orthopyroxene grains occur together with greenish pearly feldspar and translucent quartz.
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Incipient charnockites from southern India: The role of …
Brine- and CO 2-bearing fluid inclusions occur in Indian incipient charnockites of any age, Archean as well as NeoProterozoic.. Brines provide a genetic link between incipient-, massive charnockite, and Closepet Granite at Kabbal type locality, Karnataka. • Free fluids during metamorphism are further indicated by geodal textures and feldspar microveins lining …
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Charnockite suite | SpringerLink
This spectrum effectively links Howie's (1955) "charnockite suite" with the anorthosite-jotunite-magnerite "Jotun Kindred" of Goldschmidt (1916, 1922 ). The term monzonorite has been …
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The discovery of Charnockite – the rock of Charnock
Holland christened the rock as Charnockite after Job Charnock. St. Thomas Mount is a small hillock located in southern Chennai. The mount is named after St. Thomas, one of the 12 apostles of Jesus, and was instrumental in introducing Christianity to India. Today, a small shrine to St. Thomas, dating back to 1523, stands on top of the mount.
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A review of the genetic mechanisms generating igneous charnockite…
Igneous charnockites are high-temperature orthopyroxene-bearing granitoids, which constitute an important part of many high-grade terranes. High tempe…
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ALEX STREKEISEN-Jotunite-
The name charnockite comes from Job Charnock, the founder of Calcutta, whose tomb is made of this rock. Part of the confusion about charnockites is caused by the fact that the term charnockite refers both to a series of …
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USGS Mineral Resources On-Line Spatial Data
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Properties of Charnockite | Physical | Thermal
Physical Properties of Charnockite. Physical properties of rocks are used to identify the type of rocks and to discover more about them. There are various physical properties of Charnockite like Hardness, Grain Size, Fracture, Streak, Porosity, Luster, Strength etc which defines it.
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The charnockite problem, a twenty first century perspective
PDF | On Jan 1, 2010, S. Bhattacharya published The charnockite problem, a twenty first century perspective | Find, read and cite all the research you need on ResearchGate
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Review: The charnockite problem: A twenty-first century perspective
Beginning of the twentieth century was marked by coinage of a new rock name, Charnockite, first described as a hypersthene-bearing granite from Southern India.
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The Western Charnockite Zone of the Eastern Ghats Belt, …
The Western Charnockite Zone (WCZ), which is made up by basic granulites and enderbites with minor charnockites and metasediments, abuts on Archaean cratonic nuclei in the west and the khondalitic lithounits of the EGB in the east. The Godavari Rift divides it …
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Charnockite | Granite-Gneiss, Igneous-Metamorphic, Magma
Charnockite is a granofels that contains orthopyroxene, quartz, and feldspar. It is a coarse-grained, greenish rock formed at high pressures in almost water-free conditions. Learn about …
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How to pronounce charnockite | HowToPronounce
How to say charnockite in English? Pronunciation of charnockite with 2 audio pronunciations, 1 meaning and more for charnockite.
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Charnockite
The charnockite series includes rocks of many different types, some being acid and rich in quartz and microcline, others basic and full of pyroxene and olivine, while there are also intermediate varieties corresponding mineralogically to norites, quartz-norites and diorites.
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Charnockite and granite formation and influx of C0 at …
charnockite (see ref. 1) which forms the black areas. Running diagonally across the top right-hand corner of the photograph is an area of charnockite which occurs as anastamosing veins overprint ...
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On charnockites
The word charnockite should be applied only to igneous rocksWe propose that the term "charnockite" should be applied only to igneous rocks for two reasons. First, an igneous origin to charnockite is certainly implied by the inclusion of the term "charnockite" in the igneous classification of Le Maitre (1989).
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Charnockite: a candidate for 'Global Heritage …
Charnockite is an excellent example of a heritage stone as it was extensively used from time immemorial on the Indian subcontinent. The Mahabalipuram temple complex (UN world heritage site ...
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charnockite | Encyclopedia
charnockite A light-coloured, medium to coarse-grained igneous rock containing quartz and microcline feldspar (see ALKALI FELDSPAR) as major components with, in order of decreasing abundance, oligoclase feldspar (see PLAGIOCLASE FELDSPAR), hypersthene, biotite, and magnetite.Despite its low abundance, hypersthene (a calcium-poor, iron-rich pyroxene) is a …
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(PDF) A geochemical perspective on charnockite …
Large charnockite massifs occur in the high-grade Southern Granulite Terrain (SGT) and Eastern Ghats Belt (EGB) crustal provinces of Peninsular India. Available geochronological data indicate that ...
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Petrogenesis and geological significance of charnockite in …
Charnockite has similar geochemical characteristics to felsic granulite, although it differs in having 1) an uneven distribution of major and trace elements; 2) strong depletions in the large-ion lithophile element Cs, the heat-producing elements U and Th, and the high-field-strength elements Nb, ...
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(a) K2O vs. K/Rb plot of the charnockite massifs
Download scientific diagram | (a) K2O vs. K/Rb plot of the charnockite massifs considered here from SGT and EGB. Open and closed symbols for the Nagercoil and Nilgiri hills massifs from SGT, and ...
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Crystallization and melt extraction of a garnet-bearing charnockite …
The modeling results using reconstructed primary magma composition of the Yunlu charnockite combined with the orthopyroxene-garnet-plagioclase-quartz thermobarometry and fluid inclusion analyses suggest that the magma was emplaced at a pressure of ~600 MPa, a temperature of >900 °C, and an initial H 2 O content of ~4.0 wt% with rare CO 2 ...
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Metamorphic Evolution of Charnockites Across the Inferred …
Charnockites are hypersthene-bearing granitoids that form a minor but important component of the Earth's lower crust. Charnockite is a common lithology in the Highland Complex (HC) and Wanni Complex (WC) of Sri Lanka. These two Complexes are considered lithotectonic units having two different protolith histories. The northeastern part of the HC and …
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Charnockite formation at Ponmudi in southern India
The arrested development of charnockite in shear veins at Kabbaldurga 3, in the state of Karnataka in India, suggests flow of CO 2 -rich water-deficient fluids through deep-seated …
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Origin of Archaean Charnockites from Southern India
Charnockites in southern India range from low (5–6 kb) to high-pressure (7.5–8 kb) types. Intermediate chemical compositions are infrequent, although a continuous series exists from mafic to tonalite-trondhjemite end members. With the exception of K2O,...
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Charnockite: a candidate for 'Global Heritage Stone …
Charnockite is a mesocratic rock characterized by medium- to coarse-grained texture and inequigranular, interlobate to polygonal granoblastic textures with mutual interlocking of grains (Fig. 4a).
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A geochemical perspective on charnockite magmatism in
Large charnockite massifs occur in the high-grade Southern Granulite Terrain (SGT) and Eastern Ghats Belt (EGB) crustal provinces of Peninsular India. Available geochronological data indicate that the magmatism is episodic, associated with distinct orogenic cycles in the different crustal domains.
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XVIII.—The Geochemistry of the Charnockite Series of …
Since the classical work of Sir Thomas Holland at the beginning of this century on the charnockite series in Peninsular India there have appeared numerous papers describing rocks from all over the world which have been claimed to belong to this series. The rocks from the type area around Madras have now been re-examined, with particular ...
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