Volume 26, Issue 3 (10-2018)                   www.ijcm.ir 2018, 26(3): 767-774 | Back to browse issues page


XML Persian Abstract Print


Download citation:
BibTeX | RIS | EndNote | Medlars | ProCite | Reference Manager | RefWorks
Send citation to:

Homam S M, Ranjbar Moghadam F. Sequential syndeformational porphyroblast growth during low-pressure/high temperature contact regional metamorphism in the Ghandab region, NE Iran. www.ijcm.ir. 2018; 26 (3) :767-774
URL: http://ijcm.ir/article-1-1157-en.html
Ferdowsi University of Mashhad
Abstract:   (66 Views)
Detailed microstructural analysis has been conducted in the Ghandab metamorphic Complex, which is one of the most important high temperature – low pressure regional contact metamorphism studied areas in Iran. Textural evidence suggests the sequence of growth of minerals with increasing metamorphic grade and during development of a crenulation foliation. The sequence of mineral growth is considered to be cordierite, andalusite, garnet, and sillimanite.  The first foliation (S1) is preserved largely as inclusion trails in cordierite porphyroblasts. However, garnet and andalusite porphyroblasts are syndeformation crystals and grow during development of crenulation-foliation of S2. According to textural evidence, sillimanite produced late in the thermal history of metamorphism and deformation
Full-Text [PDF 113 kb]   (28 Downloads)    
Type of Study: Research | Subject: Special
Received: 2018/09/25 | Accepted: 2018/09/25 | Published: 2018/09/25

References
1. [1] Gibson R.L., "Sequential, syndeformational porphyroblast growth during Hercynian low-pressure/high-temperature metamorphism in the Canigou massif, Pyrenees", Journal of Metamorphic Geology, 10, (1992) 637-650. [DOI:10.1111/j.1525-1314.1992.tb00112.x]
2. [2] Vernon R. H., "Sequential growth of cordierite and andalusite porphyroblasts, Cooma Complex, Australia: microstructural evidence of a prograde reaction", Journal of Metamorphic Geology, 6, (1992) 255-269. [DOI:10.1111/j.1525-1314.1988.tb00418.x]
3. [3] Pattison D.R.M., Tracy R.J., "Phase equilibria and thermobarometry of metapelites", In Reviews in Mineralogy, 26: Contact metamorphism (ed. D.M. Kerrick), pp. 105-206. Mineralogical Society of America (1991).
4. [4] Gramont X. B., Guillon Y., Maurizot P., Vaslet D., Villeon H., "The 1:100000 geological map of Kariz Now", Geological survey of Iran (1979).
5. [5] Vaezipour M., Khalghi M., Alavi-Naeeni M., "Geology of Fariman and a review on metamorphic rocks from north-East of Iran", Geological Survey of Iran (1983).
6. [6] Safuraee S., "Petrology and geochemistry of metamorphic rocks from south-east of Fariman", Ms.C Thesis, Shahrood University of Technology (2007).
7. [7] Ranjbar Moghadam F., "Petrology and petrogenesis of metamorphic rocks from south-East of Ghandab with special reference to economic potential of andalusite schists, Ms.C Thesis, ferdowsi University of Mashhad (2009) .
8. [8] Eftekhar-Nejad J., "Some Information about the Origin of the Flysch Basin in Eastern Iran and its Relation to Plate Tectonics Theory", Report No.22. Geological Survey of Iran, (1973).
9. [9] Aghanabati S.A., "Etude geologique de la region de Kalmard (W.Tabas) Iran Central; stratgraphie et tectonique, Thesis, Grenoble, 231p (1975).
10. [10] Alavi M., Vaziri H., Seyed-Emami K., Lasemi Y., "The Triassic and associated rocks of the Nakhlak and Aghdarband areas in central and northeastern Iran as remnants of the southern Turanian active continental margin", GSA Bulletin; v. 109; No. 12; (1997) p. 1563-1575 https://doi.org/10.1130/0016-7606(1997)109<1563:TTAARO>2.3.CO;2 [DOI:10.1130/0016-7606(1997)1092.3.CO;2]
11. [11] Barker A.J., "Introduction to metamorphic textures and microstructures", Stanley Thornes, Oxford, (1998) 264pp. [DOI:10.1007/978-1-4615-7291-6]

Add your comments about this article : Your username or Email:
CAPTCHA code

© 2018 All Rights Reserved | Iranian Journal of Crystallography and Mineralogy

Designed & Developed by : Yektaweb