Products

anatexis and formation of granite

Crustal anatexis and formation of two types of granitic

2007-11-1  Crustal anatexis and formation of two types of granitic magmas in the Kontum massif, central Vietnam: Implications for magma processes in collision zones garnet granite (Grt granite) and orthopyroxene granite (Opx granite), from the Kontum massif, central Vietnam, which is situated on the continental collision zone between the South China

The production of granitic magmas through crustal

Granite petrogenesis is associated with the formation and evolution of continental crust along convergent plate boundaries. While magmatic processes such as partial melting and fractional

Anatexis, Formation of Migmatites, and Origin of Granitic

Abstract. Metamorphic rocks of the higher-temperature range of the amphibolite facies are closely associated with migmatites. READ (1957) describes this general observation as follows: “One of the most firmly established facts in metamorphic geology is the close association in the field of highest-grade metamorphic rocks and migmatites.”

The production of granitic magmas through crustal

Granite petrogenesis is associated with the formation and evolution of continental crust along convergent plate boundaries. While magmatic processes such as partial melting and fractional crystallization result in the compositional diversity of granites, the nature of magma sources is related to tectonic settings of granite generation.

Crustal anatexis and formation of two types of granitic

Crustal anatexis and formation of two types of granitic magmas in the Kontum massif, central Vietnam: Implications for magma processes in collision zones Author links open overlay panel M. Owada a Y. Osanai b N. Nakano

Anatexis, Formation of Migmatites, and Origin of Granitic

H. v. PLATEN (1965): Beitr. Miner, u. Petrogr. (inpress). 1) Note: This is a very important aspect of the experimental investigation, because only in the case of isobaric sections through the Ab-An-Or-Q tetrahedron, representing rock compositions having a constant Ab/ An ratio, has it been experimentally observed that rocks of various compositions, lying on any one such Ab/ An section, give

Episodic crustal anatexis and the formation of Paiku

2017-8-25  granite, recent field investigations found that the Paiku leu-cogranite is a composite pluton rather than a single one [25,26]. This pluton consists of tourmaline leucogranite, two-mica leucogranite, and garnet-bearing granite. In order to narrow down the formation age and characterize the mineral and geochemical composition of this leucogranitic

Episodic crustal anatexis and the formation of Paiku

2013-4-18  The Paiku composite leucogranitic pluton in the Malashan gneiss dome within the Tethyan Himalaya consists of tourmaline leucogranite, two-mica granite and garnet-bearing leucogranite. Zircon U-Pb dating yields that (1) tourmaline leucogranite formed at 28.2±0.5 Ma and its source rock experienced simultaneous metamorphism and anatexis at 33.6±0.6 Ma; (2) two-mica granite formed

Formation of Diatexite Migmatite and Granite Magma

2001-3-1  Petrological and geochemical variations are used to investigate the formation of granite magma from diatexite migmatites derived from metasedimentary rocks of pelitic to greywacke composition at St. Malo, France. Anatexis occurred at relatively low temperatures and pressures (<800°C, 4–7 kbar), principally through muscovite dehydration melting.

Granite Properties, Formation, Composition, Uses

Granite. Granite is the most common intrusive rock in Earth’s continental crust, It is familiar as a mottled pink, white, gray, and black ornamental stone. It is coarse- to medium-grained. Its three main minerals are feldspar, quartz, and mica, which occur

Anatexis, Formation of Migmatites, and Origin of Granitic

H. v. PLATEN (1965): Beitr. Miner, u. Petrogr. (inpress). 1) Note: This is a very important aspect of the experimental investigation, because only in the case of isobaric sections through the Ab-An-Or-Q tetrahedron, representing rock compositions having a constant Ab/ An ratio, has it been experimentally observed that rocks of various compositions, lying on any one such Ab/ An section, give

Anatexis, Formation of Migmatites, and Origin of Granitic

Abstract. Metamorphic rocks of the higher-temperature range of the amphibolite facies are closely associated with migmatites. READ (1957) describes this general observation as follows: “One of the most firmly established facts in metamorphic geology is the close association in the field of highest-grade metamorphic rocks and migmatites.”

Episodic crustal anatexis and the formation of Paiku

2017-8-25  granite, recent field investigations found that the Paiku leu-cogranite is a composite pluton rather than a single one [25,26]. This pluton consists of tourmaline leucogranite, two-mica leucogranite, and garnet-bearing granite. In order to narrow down the formation age and characterize the mineral and geochemical composition of this leucogranitic

Episodic crustal anatexis and the formation of Paiku

2013-4-18  The Paiku composite leucogranitic pluton in the Malashan gneiss dome within the Tethyan Himalaya consists of tourmaline leucogranite, two-mica granite and garnet-bearing leucogranite. Zircon U-Pb dating yields that (1) tourmaline leucogranite formed at 28.2±0.5 Ma and its source rock experienced simultaneous metamorphism and anatexis at 33.6±0.6 Ma; (2) two-mica granite formed

(PDF) Recovering the composition of melt and the fluid

anatexis and S-type granite formation. Recovering the composition of melt and the fluid regime at the onset of crustal. Email alerting services. articles cite this article.

A model for the origin of Himalayan anatexis and inverted

1998-11-10  The origin of the paired granite belts and inverted metamorphic sequences of the Himalaya has generally been ascribed to development of the Main Central Thrust (MCT). Although a variety of models have been proposed that link early Miocene anatexis with inverted metamorphism, recent dating studies indicate that recrystallization of elements of

Reworking of a granitic continental crust : from anatexis

The continental crust, which started to form about 4 Ga ago, is petrologically very diverse. The main hypothesis that this research examines is that diversity is produced through anatexis of the continental crust resulting in the formation of granite magmas, which can eventually be transferred to shallower levels and form plutons there. This study uses field and microstructural observations

Introduction to the origin of granites and related rocks

Furthermore, White and Chappell (1977) identified the fundamental relationship between high-grade metamorphism leading to crustal anatexis and the formation of granite magmas. In addition, White and Chappell (1983) recognized that the source of I-type granites is

[PDF] Formation and Evolution of Granite Magmas During

DOI: 10.1093/PETROJ/39.6.1147 Corpus ID: 131607331. Formation and Evolution of Granite Magmas During Crustal Reworking: the Significance of Diatexites @article{Sawyer1998FormationAE, title={Formation and Evolution of Granite Magmas During Crustal Reworking: the Significance of Diatexites}, author={Edward W. Sawyer}, journal={Journal of Petrology}, year={1998}, volume={39},

花岗岩浆形成定位机制的思考与研究进展 百度学术

花岗岩浆形成定位机制的思考与研究进展. 花岗岩 (广义)是陆壳的标志,也是地球岩石圈区别于其它行星岩石圈的标志.文章介绍了行星探测和大洋调查等方面的成果对花岗岩形成的地质约束:行星从岩浆表壳向岩石表壳转换过程以及现代地幔过程,均没有产生有规模

Episodic crustal anatexis and the formation of Paiku

2013-4-18  The Paiku composite leucogranitic pluton in the Malashan gneiss dome within the Tethyan Himalaya consists of tourmaline leucogranite, two-mica granite and garnet-bearing leucogranite. Zircon U-Pb dating yields that (1) tourmaline leucogranite formed at 28.2±0.5 Ma and its source rock experienced simultaneous metamorphism and anatexis at 33.6±0.6 Ma; (2) two-mica granite formed

(PDF) Crustal anatexis and formation of two types of

Grt granite locally forms a migmatite structure accompanied by a garnet-orthopyroxene gneiss (Grt-Opx gneiss) (Fig. 3c). Both Grt granite and Opx granite contain fine-grained gabbro as coeval intrusive rocks ( Fig. 3d) or as enclaves.Grt granite consists mainly of Pl, Qtz, Kfs, Grt, and Bt ( Fig. 4a,b).

(PDF) Recovering the composition of melt and the fluid

anatexis and S-type granite formation. Recovering the composition of melt and the fluid regime at the onset of crustal. Email alerting services. articles cite this article.

Formation of Diatexite Migmatite and Granite Magma

Request PDF Formation of Diatexite Migmatite and Granite Magma during Anatexis of Semi-pelitic Metasedimentary Rocks: an Example from St. Malo, France Petrological and geochemical variations

A model for the origin of Himalayan anatexis and

2018-6-25  MCT. We envision that formation of the MCT Zone involved successive accretion of tec- tonic slivers of the Lesser Himalayan Formations to the hanging wall and incorporate these effects into the model. The model predicts continued anatexis up to 400 km north of the Hi-

Himalayan leucogranites and migmatites: nature, timing

2017-2-12  ABSTRACT Widespread anatexis was a regional response to the evolution of the Himalayan-Tibetan Orogen that occurred some 30 Ma after collision between Asia and India. This paper reviews the nature, timing, duration and conditions of anatexis and leucogranite formation in the Greater Himalayan Sequence

A model for the origin of Himalayan anatexis and inverted

1998-11-10  The origin of the paired granite belts and inverted metamorphic sequences of the Himalaya has generally been ascribed to development of the Main Central Thrust (MCT). Although a variety of models have been proposed that link early Miocene anatexis with inverted metamorphism, recent dating studies indicate that recrystallization of elements of

Reworking of a granitic continental crust : from anatexis

The continental crust, which started to form about 4 Ga ago, is petrologically very diverse. The main hypothesis that this research examines is that diversity is produced through anatexis of the continental crust resulting in the formation of granite magmas, which can eventually be transferred to shallower levels and form plutons there. This study uses field and microstructural observations

Charnockite and granite formation and influx of CO2 at

The P–T conditions in which this occurs are important because, with an increase in XH2O, conditions which may allow anatexis could be initiated in advance of such a CO2-rich phase.

Fertility of crustal rocks during anatexis Earth and

2011-11-3  Fertility of crustal rocks during anatexis Volume 87 Issue 1-2. After many years of systematic experimental investigations, it is now possible to quantify the conditions for optimum fertility to melt production of most common crustal rock types as functions of temperature and to about 30 kbar pressure. Quartzo-feldspathic melting produces steady increases in melt proportion with increasing