#

Email Us : [email protected]

Hot products

contact form

Geologic units containing Alkali-feldspar granite

Geologic units containing Alkali-feldspar granite. Earth material. Plutonic rock. Granitoid. Alkali-feldspar granite. A plutonic rock defined in the QAPF diagram as having Q between 20 and 60% and P/ (A+P) < 10%. This category is also used for alkali-granite (alaskite) . California - Idaho - Massachusetts - Maine - Nevada - Rhode Island - Virginia.


Get Price

ALEX STREKEISEN-Alkali feldspar granite-

Alkali Feldspar Granite. Granite is a medium-tocoarse-grained acid igneous rock with essential quartz (>20%) and feldspar, where alkali feldspar constitutes between 100 and 35% of the feldspars, and minor mafic minerals. Hornblende and biotite are the .


Get Price

Tectonic significance of Late Precambrian calc-alkaline

colours. The contacts of the alkali feldspar granite with the other rock types are characterized by the presence of pegmatitic pockets and veins, which led Soliman (1992) to describe this granite as pegmatitic granite. The pegmatitic pockets and veins might represent seg .


Get Price

Origin of alkali-feldspar granites: An example from the

Origin of alkali-feldspar granites: An example from the Poimena Granite, northeastern Tasmania, Australia


Get Price

Amazonitic alkali feldspar from the Tanakami Granitic

This is the first detailed description of amazonitic alkali feldspar in Japan. The amazonitic feldspar is from peg-matite in the Tanakami Granite, southwest Japan. Macroscopically, the feldspar is characterized by the coexis-tence of pale blue and white parts. The two parts of microperthite are distinctly different in terms of their micro-


Get Price

CONTENTS Tectonostratigraphic characteristics of the .

2019-4-24 · Alkali feldspar granite, syenite, orthoclase, albite, raw material, glass, ceramic, Central Anatolia. Received Date: 22.06.2017 Accepted Date: 05.12.2017 ABSTRACT Alkali feldspar granites represent one of the major sources that provide raw materials for glass and ceramics industry because of their high feldspar and quartz contents.


Get Price

The Granite Problem: Evidence from the Quartz and .

The inversion temperatures of the quartz from twenty-five specimens of the Beinn an Dubhaich granite have been measured and found to correspond to the inversion temperatures of quartz from rhyolites previously studied. Optical and X-ray studies of the alkali and plagioclase feldspars indicate high temperature modifications.


Get Price

L100

Alkali feldspar (orthoclase) - Grains typically 2-4mm long, subhedral to anhedral, dirty looking due to alteration.Many display a microperthite texture.. Plagioclase feldspar - Grains typically 1-4mm long, subhedral, characteristic lamellar twinning.Many of the grains look "dirty" under plain polarised light, and have high birefringence speckles under cross-polarised light.


Get Price

Amazonitic alkali feldspar from the Tanakami Granitic

This is the first detailed description of amazonitic alkali feldspar in Japan. The amazonitic feldspar is from peg-matite in the Tanakami Granite, southwest Japan. Macroscopically, the feldspar is characterized by the coexis-tence of pale blue and white parts. The two parts of microperthite are distinctly different in terms of their micro-


Get Price

Radioelement geochemistry of alkali granites of the .

2019-4-9 · feldspar geothermometry based on the Ab-component in coexisting alkali feldspar- plagiodase pairs give an estimate of 704-740°C for the Ambalavayal granite (Santosh 1985a). The modal Q-A-P proportions of the granite correspond to a range between


Get Price

Geochemistry of the Kwanaksan alkali feldspar granite: A

1995-9-1 · Abstract. The Jurassic Kwanaksan stock, so far known to be composed of biotite granite only, has the mineral assemblage of quartz+K-feldspar+plagioclase+biotite ${pm}$ gernet. The lithology of the stock is classified as alkali feldspar granite by their mode and plagioclase compositions (An5).Subsolvus feldspars, rather early crystallization of biotite, and shallow emplacement depth estimated


Get Price

Geochemical, Sr-Nd and zircon The Miocene ocean Os/ .

2012-7-8 · alkali-feldspar granite, are identified based on our petrological and geochemical studies on the voluminous granitic batholiths in the West Junggar. The dioritic rocks are calc-alkaline, Mg enriched, and show high Sr/Y ratios, with weak negative Eu and pronounced .


Get Price

Silurian alkaline magmatism in the Saur area, northern

2020-9-23 · Thus, we conducted combined studies of geochemistry, zircon U–Pb geochronology and Sr–Nd–Hf isotopes upon the Awusiqi alkali-feldspar granite and volcanic rocks from the Saur area in northern West Junggar. The Awusiqi volcanic rocks are mainly composed of andesites, rhyolites, and pyroclastic rocks.


Get Price

EXPERIMENTAL STUDIES OF IGNEOUS ROCK SERIES: THE

granite to tonalite, and of four specimens from the Star Mountain Rhyolite, have been determined in the presence of 15-20 weight per cent HO20 in the pressure range from 1 to 3 kb. PT curves have been located for the beginning of melting and for the complete melting of quartz, alkali feldspar, and plagioclase. Glass percentages


Get Price

Amazonitic alkali feldspar from the Tanakami Granitic

This is the first detailed description of amazonitic alkali feldspar in Japan. The amazonitic feldspar is from peg-matite in the Tanakami Granite, southwest Japan. Macroscopically, the feldspar is characterized by the coexis-tence of pale blue and white parts. The two parts of microperthite are distinctly different in terms of their micro-


Get Price

STUDIES OF THE PRECAMBRIAN HEREFOSS GRANITE

STUDIES OF THE PRECAMBRIAN HEREFOSS GRANITE I. K-FELDSPAR OBLIQUITY BY BoRGHILD NILSSEN and ScoTT B. SMITHSON1 (Mineralogical-Geological Museum, University of Oslo, Sarsgt. l, Oslo 5) Abstract. The Herefoss granitic pluton is a circular diapiric body cut by a fault that causes two different levels of the pluton to be exposed. The pluton

Title Studies on the Alkali Feldspars from Kii Province

2014-5-1 · Studies on the Alkali Feldspars frorn Kii Province, Japan By Kunio TsuJiMuRA (Received March 30, 1971) Abstract The alkali feldspars which occur as phenocrysts in the granite porphyry of a dike lying from Kurozu to Talji in the southern part of Kii Prov., Japan were found to be composed of the fol- iowing phases. .


Get Price

Alkali Feldspar: Mineral information, data and localities.

A subgroup of the Feldspar Group, poor in calcium, and mostly rich in potassium.It is mostly used in petrology for the high temperature series from sanidine to high albite; the series is incomplete at low temperature, but normal albite, orthoclase and microcline are generally still included as alkali feldspars. Some workers (eg the Strunz classification) include barium feldspars (celsian and


Get Price

Silurian alkaline magmatism in the Saur area, northern

2020-9-23 · Thus, we conducted combined studies of geochemistry, zircon U–Pb geochronology and Sr–Nd–Hf isotopes upon the Awusiqi alkali‐feldspar granite and volcanic rocks from the Saur area in northern West Junggar. The Awusiqi volcanic rocks are mainly composed of andesites, rhyolites, and pyroclastic rocks.


Get Price

Geochemical, Sr-Nd and zircon The Miocene ocean Os/ .

2012-7-8 · alkali-feldspar granite, are identified based on our petrological and geochemical studies on the voluminous granitic batholiths in the West Junggar. The dioritic rocks are calc-alkaline, Mg enriched, and show high Sr/Y ratios, with weak negative Eu and pronounced negative Nb-Ta anomalies. Their depleted Sr-


Get Price

Geology of the Andover Granite and surrounding rocks

Field and petrographic studies of the Andover Granite and surrounding rocks have afforded an opportunity for an explanation of its emplacement and crystallization. The investigation has contributed secondarily to an understanding of the geologic history of southeastern New England, particularly as it is revealed in the Lawrence, Wilmington, South Groveland, and Reading quadrangles of

Title Studies on the Alkali Feldspars from Kii Province

2014-5-1 · Studies on the Alkali Feldspars frorn Kii Province, Japan By Kunio TsuJiMuRA (Received March 30, 1971) Abstract The alkali feldspars which occur as phenocrysts in the granite porphyry of a dike lying from Kurozu to Talji in the southern part of Kii Prov., Japan were found to be composed of the fol- iowing phases. .


Get Price

Potential Alkali-Reactivity of Granite Aggregates in the

2013-5-16 · Granite aggregates are the preferred material used in concrete in Peninsular Malaysia. They are generally considered non alkali-aggregate reactive (Chow & Abdul Majid 1990; Yeap 1992). however, recent studies revealed that some of the granite aggregates are alkali reactive (Ng 2010; Ng & Yeap 2007). it is imperative that potentially


Get Price

Title Studies on the Alkali Feldspars from Kii Province

2014-5-1 · Studies on the Alkali Feldspars frorn Kii Province, Japan By Kunio TsuJiMuRA (Received March 30, 1971) Abstract The alkali feldspars which occur as phenocrysts in the granite porphyry of a dike lying from Kurozu to Talji in the southern part of Kii Prov., Japan were found to be composed of the fol- iowing phases. .


Get Price

Dislocation formation and albitization in alkali feldspars

2005-12-28 · granite alkali feldspars have therefore experienced two separate phases of fluid-feldspar interaction, which have produced compositionally and microtexturally distinct re-action products. The implications are that the manner in which alkali feldspars interact with fluids may depend on the temperature and origin of ambient fluids. Character-


Get Price

Geology of the Andover Granite and surrounding rocks

Field and petrographic studies of the Andover Granite and surrounding rocks have afforded an opportunity for an explanation of its emplacement and crystallization. The investigation has contributed secondarily to an understanding of the geologic history of southeastern New England, particularly as it is revealed in the Lawrence, Wilmington, South Groveland, and Reading quadrangles of

Alkali-Feldspar Granite

Alkali-feldspar Granite Type: Igneous (Plutonic) Age: Lower Cretaceous (114-122 million years) Origin: Rongcheng, Shandong Province, China


Get Price

Geochemical, Sr-Nd and zircon The Miocene ocean Os/ .

2012-7-8 · alkali-feldspar granite, are identified based on our petrological and geochemical studies on the voluminous granitic batholiths in the West Junggar. The dioritic rocks are calc-alkaline, Mg enriched, and show high Sr/Y ratios, with weak negative Eu and pronounced .


Get Price

Amazonitic alkali feldspar from the Tanakami Granitic

This is the first detailed description of amazonitic alkali feldspar in Japan. The amazonitic feldspar is from peg-matite in the Tanakami Granite, southwest Japan. Macroscopically, the feldspar is characterized by the coexis-tence of pale blue and white parts. The two parts of microperthite are distinctly different in terms of their micro-


Get Price

Silurian alkaline magmatism in the Saur area, northern

2020-9-23 · Thus, we conducted combined studies of geochemistry, zircon U–Pb geochronology and Sr–Nd–Hf isotopes upon the Awusiqi alkali‐feldspar granite and volcanic rocks from the Saur area in northern West Junggar. The Awusiqi volcanic rocks are mainly composed of andesites, rhyolites, and pyroclastic rocks.


Get Price

Geochemistry of the Kwanaksan alkali feldspar granite: A

1995-9-1 · Abstract. The Jurassic Kwanaksan stock, so far known to be composed of biotite granite only, has the mineral assemblage of quartz+K-feldspar+plagioclase+biotite ${pm}$ gernet. The lithology of the stock is classified as alkali feldspar granite by their mode and plagioclase compositions (An5).Subsolvus feldspars, rather early crystallization of biotite, and .


Get Price

ALEX STREKEISEN-Alkali feldspar granite-

Alkali Feldspar Granite. Granite is a medium-tocoarse-grained acid igneous rock with essential quartz (>20%) and feldspar, where alkali feldspar constitutes between 100 and 35% of the feldspars, and minor mafic minerals. Hornblende and biotite are the .


Get Price

Geology of the Andover Granite and surrounding rocks

Field and petrographic studies of the Andover Granite and surrounding rocks have afforded an opportunity for an explanation of its emplacement and crystallization. The investigation has contributed secondarily to an understanding of the geologic history of southeastern New England, particularly as it is revealed in the Lawrence, Wilmington, South Groveland, and Reading quadrangles of

Phosphorus and rubidium in alkali feldspars: case studies

2014-3-20 · In contrast, phosphorus can be easily released from the feldspar lattice and P content serves as a sensitive indicator of the late- and/or post-magmatic fluid-related reactions. Key words:alkali feldspar granite, pegmatite, chemical composition, alkali feldspar group, magmatism, fractional crystallization, phosphorus, rubidium


Get Price

Phosphorus and rubidium in alkali feldspars: case studies

2014-3-20 · In contrast, phosphorus can be easily released from the feldspar lattice and P content serves as a sensitive indicator of the late- and/or post-magmatic fluid-related reactions. Key words:alkali feldspar granite, pegmatite, chemical composition, alkali feldspar group, magmatism, fractional crystallization, phosphorus, rubidium


Get Price

The Late Cretaceous A-type alkali-feldspar granite from Mt

This granite is mainly composed of alkali feldspar (perthite) and quartz, with small amounts of albite. Accessories are hematite with ilmenite exsolution, zircon, apatite and monazite. Anatase, rutile (?), kokchetavite, and kumdykolite are found only as inclusions in zircon. The granite shows a geochemical signature typical for an A2-subtype


Get Price

Phase relations of a F-enriched peraluminous granite: an

2006-11-17 · Phase relations of F-rich Kymi equigranular topaz granite have been investigated experimentally at 100–500 MPa as a function of water activity and F .

Geology and mineralization of the Jabalat alkali-feldspar

Geology and mineralization of the Jabalat alkali-feldspar granite, northern Asir region, Kingdom of Saudi Arabia December 1986 Journal of African Earth Sciences (1983) 4:183-188


Get Price

CONTENTS Tectonostratigraphic characteristics of the .

2019-4-24 · Alkali feldspar granite, syenite, orthoclase, albite, raw material, glass, ceramic, Central Anatolia. Received Date: 22.06.2017 Accepted Date: 05.12.2017 ABSTRACT Alkali feldspar granites represent one of the major sources that provide raw materials for glass and ceramics industry because of their high feldspar and quartz contents.


Get Price

Geochemistry of the Kwanaksan alkali feldspar granite: A

1995-9-1 · Abstract. The Jurassic Kwanaksan stock, so far known to be composed of biotite granite only, has the mineral assemblage of quartz+K-feldspar+plagioclase+biotite ${pm}$ gernet. The lithology of the stock is classified as alkali feldspar granite by their mode and plagioclase compositions (An5).Subsolvus feldspars, rather early crystallization of biotite, and .


Get Price

Petrology and paleomagnetism of the Long Mountain .

2014-8-14 · The Long Mountain Granite, a member of the Cam-brian Wichita Granite Group, is exposed in the western Wichita Mountains. The rock is red at the surface and grades into a dark gray to green that has been exposed by quarrying operations. The Long Mountain Granite is a granophyric, fluorite-bearing alkali-feldspar gran-


Get Price

Radioelement geochemistry of alkali granites of the .

2019-4-9 · feldspar geothermometry based on the Ab-component in coexisting alkali feldspar- plagiodase pairs give an estimate of 704-740°C for the Ambalavayal granite (Santosh 1985a). The modal Q-A-P proportions of the granite correspond to a range between


Get Price

Silurian alkaline magmatism in the Saur area, northern

2020-9-23 · Thus, we conducted combined studies of geochemistry, zircon U–Pb geochronology and Sr–Nd–Hf isotopes upon the Awusiqi alkali-feldspar granite and volcanic rocks from the Saur area in northern West Junggar. The Awusiqi volcanic rocks are mainly composed of andesites, rhyolites, and pyroclastic rocks.


Get Price

Phase relations of a F-enriched peraluminous granite: an

2006-11-17 · Phase relations of F-rich Kymi equigranular topaz granite have been investigated experimentally at 100–500 MPa as a function of water activity and F .

Origin of alkali-feldspar granites: An example from the

1988-10-1 · Printed in U.S.A. 0016-7037/88/S3.00 + .00 Origin of alkali-feldspar granites: An example from the Poimena Granite, northeastern Tasmania, Australia DOUGLAS E. MACKENZIE, LANCE P. BLACK and SHEN-SU SUN Bureau of Mineral Resources, G.P.O. Box 378, Canberra, ACT 2601, Australia (Received August 10, 1987; accepted m revised form July 28, 1988


Get Price

REQUEST A FREE QUOTE

Get answers and advice from people you want it from.