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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 | SpringerLink

Charnockite is a dark, granitic rock with hypersthene and alkali feldspar, formed by metamorphism or migmatization of amphibolite or granulite. It is widespread in Peninsular India and some …

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Weathering of charnockites and sediment production in

In the Cauvery catchment area, charnockites are making high hills compared to gneisses. In situ, static weathering of a charnockitic boulder shows les…

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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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Petrology and geochemistry of charnockites (felsic ortho …

Charnockite (orthopyroxene-bearing, felsic ortho-granulites) Charnockites display a wide range of composition from granodioritic/tonalitic (enderbite) to granitic, and are different from arrested-type charnockites, which are usually granitic (see Ravindra Kumar and Raghavan, 1992).

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Incipient charnockite formation at the waning stage of …

The incipient charnockite or orthopyroxene-bearing granitic orthogneiss is a relatively common constituent in ancient granulite-facies terranes, and its formation has been often attributed to an influx of CO 2-rich fluid or a removal of aqueous melt.Temporal relationship between the orthopyroxene formation and the fluid or melt migration, however, remains …

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Review the charnockite problem, a twenty first century …

Discover the origins of charnockite rocks and the ongoing debate between their igneous and metamorphic origins. Explore the diverse field relations and structural settings of charnockites worldwide. Gain insights into the nomenclature challenges and propose a uniform approach. Delve into the metamorphic transformation and migmatisation processes.

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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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USGS Mineral Resources On-Line Spatial Data

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Charnockite | SpringerLink

Charnockite is a felsic, melanocratic, holocrystalline, alkali granitic rock first described from the tombstone of Job Charnock in the graveyard of St. John's garrison church, Calcutta, India (Holland, 1900).The rock-type is widespread in the Madras area (whence the gravestone originated—St. Thomas Mtn.) and is known from much of the high-grade terrane of Peninsular …

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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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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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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: Mineral information, data and localities.

Charnockite mineral data, information about Charnockite, its properties and worldwide locations.

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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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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: 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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Mesoarchean charnockites from the Coorg Block, Southern …

Charnockites constitute the major rock type in the crustal blocks of Southern Granulite Terrain (SGT) in India. Here we present petrology, mineral chemistry, and geochemistry of the oldest charnockites in the SGT from the Coorg Block.

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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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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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A chip off the ol' charnockite

We visited the Philip Carter Winery this weekend with family. Baxter and I were pleased to see outcrops of charnockite scattered over the property (located in the middle of the Blue Ridge geologic province). As any 18-month-old will tell you, charnockite is a pyroxene-bearing granitoid. It's a distinctive and common rock type in ia's Proterozoic basement …

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Geochronology of granulite, charnockite and gneiss in the …

Charnockite is a granulitic rock with a variety of compositions characteristic of the association of orthopyroxene with K-feldspar. As a consequence it may also represent an assemblage of rock types connected in their origin by the various mineralogy and mode of occurrence. Thus, the wide distribution of such rocks has been sometimes described ...

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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 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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Charnockite

Charnockite is a type of granulite with hypersthene and garnet, formed by regional metamorphism of mafic and felsic rocks. Learn about the charnockite massifs in the Southern …

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1911 Encyclopædia Britannica/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. A special feature, recurring in many members of the group, is the ...

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The Charnockite Geotherm | Science

Charnockite, a hypersthene-bearing granite, and other associated rocks of the charnockite series have a global distribution. These rocks, according to evidence from mineral-chemical and …

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(PDF) Charnockites and Charnockites

PDF | Graphical abstract Figure optionsView in workspaceDownload full-size imageDownload as PowerPoint slide Highlights Charnockites are important... | Find, read and cite all the research you ...

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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 ...