Chapter 8: Major Elements - Faculty web pages

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$Math 361 Problem Set #5 Due 5 October 2012 - Faculty web pages$

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Principal mineral changes result from breakdown of cpx and plagioclase: More Ca-rich plagioclases become progressively unstable at lower T General correlation between temperature and the maximum An-content of the stable plagioclase Metamorphism of Mafic Rocks At low metamorphic grades only albite (An 0-3 ) is stable In the upper-greenschist facies oligoclase becomes stable. Andesine and more calcic plagioclases are stable in the upper amphibolite and granulite facies The excess Ca and Al → calcite, an epidote mineral, sphene or amphibole depending on P-T-XP
Metamorphism of Mafic Rocks Clinopyroxene breaks down to a number of mafic minerals, depending on grade. Including chlorite, actinolite, hornblende, epidote, a metamorphic pyroxene, etc. The mafic(s) ) that form are commonly diagnostic of the grade and facies
Page 1 and 2: Metamorphic Facies Eskola (1915) ,
Page 3 and 4: Metamorphic Facies Interpretive: :
Page 5 and 6: Metamorphic Facies In his final ac
Page 7 and 8: Metamorphic Facies Fig. 25-2. 2. Te
Page 9 and 10: It is convenient to consider metamo
Page 11 and 12: Fig. 25-2. 2. Temperature- pressure
Page 15 and 16: Metamorphic Facies Combine the conc
Page 17 and 18: Figure 21-1. Metamorphic field grad
Page 19 and 20: Facies Series High P/T series - occ
Page 21: Metamorphism of Mafic Rocks Most
Page 25 and 26: Mafic Assemblages of the Medium P/T
Page 27 and 28: Greenschist Facies Greenschist, A
Page 29 and 30: Amphibolite facies Greenschist
Page 31 and 32: Transition to Granulite Facies Maf
Page 33 and 34: Greenschist, Amphibolite, Granulite
Page 35 and 36: Greenschist, Amphibolite, Granulite
Page 39 and 40: Mafic Assemblages of the High P/T S
Page 41 and 42: Blueschist and Eclogite Facies The
Page 43 and 44: Blueschist and Eclogite Facies Eclo
Page 45 and 46: Pressure-Temperature Temperature-Ti
Page 49 and 50: Fig. 25-13a. Conventional P-T P T d
Page 53 and 54: Fig. 25-12a. Schematic pressure-tem
Page 55 and 56: Fig. 25-12b. Schematic pressure-tem
Page 59 and 60: 2. P max and T max do not occur at
Page 61 and 62: This occurs at a pressure well belo
Page 63: Metamorphic field gradient - PT cha

Chapter 8: Major Elements - Faculty web pages

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