Chapter 18: Granitoid Rocks - Faculty web pages

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<strong>Granitoid</strong> classification: S-I-A-M S M (Chappell and White,1974):I-type– derived by partial melting of mafic mantle-derivedigneous source probably sub-crustalunderplate, , e.g., Andeangranites• metaluminous to peraluminous• common oxide is magnetite• hornblende-richrich
<strong>Granitoid</strong> classification: S-I-A-M S M (Chappell and White,1974):S-type– derived by partial melting of peraluminoussedimentary rks imprinted by weathering at Earth’s s surfaceCommon concentration inland from trench, e.g., SierraNevada• Always peraluminous• common oxide is ilmenite• biotite-rich and contain cordierite, may contain muscovite,andalusite, sillimanite or garnet
Page 1 and 2: Chapter 18: Granitoid Rocks“Grani
Page 3 and 4: 2) Because the crust is solid in it
Page 5 and 6: Zircon Xenocrysts - Hard, refractor
Page 7: Alumina saturation: Peraluminous -
Page 11 and 12: Table 18-3. The S-I-A-M Classificat
Page 13 and 14: Anorogenic - magmatism within a pla
Page 15: Himalayas - Continent - continent c

Chapter 18: Granitoid Rocks - Faculty web pages

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