major classification schemes of the granitoids. Modal mineralogy/IUGS classification This scheme is based on measurable pa-rameters. It employs modal proportions of quartz, alkali-feldspar and plagioclase. It is simple and truly non-genetic, but is tedious involving staining and point-counting. In addition, the scheme has the

Trace-element based geotectonic classification of granitoids by Pearce et al. (1984). Harris et al. (1986) Harris Gr ternary plot Hf - Rb/30 - Ta×3 The diagram distinguishes among four types of collisional granites.

Winter (2001) An Introduction to Igneous and Metamorphic Petrology. Prentice Hall. Granitoid Rocks Table 18-4. A Classification of Granitoid Rocks Based on Tectonic Setting. Geochemical classification of plutonic rocks in central and northern Sweden Martin Ahl, Stefan Bergman, Ulf Bergström, Thomas Eliasson, Magnus Ripa & Pär Weihed Final report of research project 5172: ”Geochemical classification of Swedish granitoids” at the Geological Survey of Sweden Sveriges Geologiska Undersökning 2001 Petrogenetic types of granitoids Classification of granitoid rocks is based on their source rocks; I-type granites are derived from igneous sources, whereas S-type granites are sourced from sedimentary rocks (Chappell and White, 1974, 1992, 2001).

Granitoids classification

example, granites, one of which is referred to as greisen alteration. Mainly 2002: Igneous Rocks: A Classification and Glossary of Terms. av B Anders · Citerat av 9 — Zone with Variscan granitoids from the Alps, the Carpathians and the In an attempt to classify the granitoid basement rocks from the Pelagonian Zone and the U-Pb SIMS dating of some granitoids from eastern Blekinge, southern Sweden babblers (Aves, Passeriformes): major lineages, family limits and classification. Quartz monzogabbro. Quartz anorthosite. Diorite.

AGeochemical Classification for Feldspathic Igneous Rocks B. RONALD FROST* AND CAROL D. FROST DEPARTMENT OF GEOLOGY AND GEOPHYSICS, UNIVERSITY OF WYOMING, LARAMIE, WY 82072, USA RECEIVED MAY 13, 2008; ACCEPTED OCTOBER 3, 2008 ADVANCE ACCESS PUBLICATION NOVEMBER 20, 2008 In this paper we classify the range of feldspathic igneous rocks

In book: Post-Archaean SIAM Classification • Applies to granitic rocks • Chappell and White (1974) • Barbarin (1990) Main Types • S-type granites • I-type granites • A-type granitoids • M-type granitoids S-Type Granites • Occur in regional metamorphic terranes • Partial melting of metasediments • High Al but contain no hornblende Archean granitoids: classification, petrology, geochemistry and origin. April 2019.

Sources, and Geodynamic Environments of the Origin of Granitoids Classification of Spectral and Morphological Features: The Discovery

Ryolit/dacit. to those suggested by the zircon classification developed by Belousova et al.

(1984). Harris et al.

Amphibole and pyroxene are more common in I-type granitoids, while S-type granitoids may have garnet, cordierite, and sillimanite. Both types of granitoids may also contain biotite classification devised by two Australians Bruce Chappel and Alan White. Their classification is based on the presumed source rocks – sedimentary (pelitic) and igneous (mafic) - that impart characteristic composition on the granitoids. However, people found additional granitoids with distinct characteristics - anorogenic (A-type) Most of these calc-alkaline plutonic rocks which characterize both collision-related and active plate margin environments have been classically identified as I (igneous)-type granitoids, following Chappell and White's (1974) classification, and then interpreted as derived from partial melting of older igneous rocks (restite model).
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Classification of the Continental Crust Transformation Series Granitoids in South China Based on the differences in tectonic setting, source material compositton and formation pattern, the authors suggest that the continental crust transformation series granitoids (Xu Keqing et al., 1984) in South China be subdivided into three types.

Amphibole and pyroxene are more common in I-type granitoids, while S-type granitoids may have garnet, cordierite, and sillimanite.

peraluminous granitoids of crustal origin, «tholei-itic» and alkaline granitoids of mantle origin, and calc-alkaline granitoids of mixed origin with various proportions of crustal and mantle-derived compo-nents. The first part ends with a comparison of the proposed typology with the twenty most used genetic classifications of granitoids.

Gabbro. Anorthosite. Monzodiorite. Monzogabbro. Group C meta- intrusive rocks. Field classification. Granitoid.

These are FeO/(FeO + MgO) = Fe-number (or FeO tot /(FeO tot + MgO) = Fe * ), the modified alkali–lime index (MALI) (Na 2 O + K 2 O – CaO) and the aluminum saturation index (ASI) (Al/(Ca – 1·67P + Na + K)). The Fe-number (or Fe * ) distinguishes ferroan granitoids, which manifest strong iron enrichment, from Classification of Granitoids: Mineralogical classifications (IUGS classification) Chemical classification (alumina saturation, S-I-A-M classification etc.) Tectonic classification (Based on plate tectonic setting) Q-A-P classification of Granitoids ( a part of QAPF classification) Fig.1. After IUGS (1973) Granite classification based on alumina Abstract. Classification and Source Materials of Continental Crust Transformation Series Granitoids in South China Liu Changshi, Zhu Jinchu, Shen Weizhou and Xu Shijin Department ofEarth Sciences, Nan jng University, Nan jng, Jiangsu Abstract The granitoids of the continental crust transformation series in South China may be divided into three types: (1) synorogenic migmatic and magmatic type ESM 8: Chemical variation, modal composition and classification of granitoids.