Volume 10, Issue 2 (2-2010)                   2010, 10(2): 807-824 | Back to browse issues page

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Karimi S. Petrography and Petrology of metapelites in middle part of sanandaj – sirjan zone (North of Golpayegane – East of Khomein). Journal title 2010; 10 (2) :807-824
URL: http://jsci.khu.ac.ir/article-1-1449-en.html
Abstract:   (6900 Views)
Abstra
The metapelites of North of Golpayegan show that these rocks can be divided into four categories based on mineral assemblages: chloritoid- garnet- biotite- schist, garnet- biotite- muscovite- schist, staurolite bearing garnet- biotite- muscovite schist and Kyanite bearing staurolite- biotite- muscovite- schist.
The appearance of chloritoid in chloritoid- garnet- biotite schists shows green schist facies. Garnets in garnet- biotite- muscovite schists shows 3 stage of growth and syn-tectonic formation.
The appearance of staurolite in staurolite bearing garnet- biotite- muscovite schists signifies the beginning of amphibolite facies. The absence of zoning in the staurolite contained in these schists suggests the formation and growth of this mineral in a prograde metamorphism.
The thermodynamic study of these rocks shows that North of Golpayegan's metapelites were formed within a temperature range of 480 – 560oC and a pressure range of 1.6 – 4.1 kbar. These results are consistent with the minerals' paragenetic evidence and show that effect of metamorphism on North of Golpayegan's pelitic sediments is to lower amphibolite facies (Epidote amphibolite).
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Type of Study: S | Subject: Geology
Published: 2010/02/15

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