Chapter 21: Metamorphism - Faculty web pages

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

$Math 362 Problem Set #9 â€“ Solution 27 April 2012 - Faculty web ...$

Burial metamorphism occurs in areas that have notexperienced significant deformation or orogeny• Restricted to large, relatively undisturbed sedimentarypiles away from active plate margins•e.g., Bengal Fan → sedimentary pile > 22 km•Extrapolating→ 250-300o C at the base (P ~ 0.6 GPa)•Well into the metamorphic range, and the weight of theoverlying sediments sufficient to impart a foliation atdepth•Passive margins often become active•Areas of burial metamorphism may thus become areasof orogenic metamorphism
The Types of <strong>Metamorphism</strong>Ocean-Floor <strong>Metamorphism</strong> affects the oceaniccrust at ocean ridge spreading centers• Wide range of temperatures at relatively lowpressure• Metamorphic rocks exhibit considerablemetasomatic alteration, notably loss of Ca and Siand gain of Mg and Na• These changes can be correlated with exchangebetween basalt and hot seawater
Page 2: The Limits of Metamorphism• Low-t
Page 5 and 6: Metamorphic Agents and ChangesIncre
Page 7 and 8: Figure 21-1. Metamorphic field grad
Page 9 and 10: Stress• Lithostatic pressure is u
Page 11 and 12: •Deviatoricstress affects the tex
Page 13 and 14: Fluids• P fluid indicates the tot
Page 15 and 16: The Types of MetamorphismDifferent
Page 17 and 18: Contact Metamorphism• Adjacent to
Page 19 and 20: The Types of MetamorphismContact Me
Page 21 and 22: The Types of MetamorphismOrogenic M
Page 23 and 24: The Types of MetamorphismOrogenic M
Page 25: The Types of MetamorphismBurial met
Page 29 and 30: The Progressive Nature of Metamorph
Page 31 and 32: Each rock preserves the conditions
Page 33 and 34: Types of ProtolithCommon types of s
Page 35 and 36: Orogenic Regional Metamorphism ofth
Page 37 and 38: The sequence of zones now recognize
Page 39 and 40: To summarize:• An isograd represe
Page 41 and 42: Paired Metamorphic Belts of Japan
Page 43 and 44: Figure 21-12. The Sanbagawa andRyok
Page 45 and 46: Paired Metamorphic Belts of Japan

Chapter 21: Metamorphism - Faculty web pages

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