petrology of ultramafic and related rocks along iraqi zagros thrust zone

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Chapter 2 Geology and Tectonic setting 13
2-1 Regional geology The Iraq Zagros Thrust Zone in the north and northeastern Iraq represents a suture zone between the Arabian and Iranian plates to the northeast and the Turkish plate to the north. It occupies an area of about 5000 km 2 along the Turkey-Iraq-Iran border. The Iraqi Zagros Thrust Zone represents a part of the larger Zagros orogen belt which extends about 2000 km from southeastern Turkey through northern Syria and Iraq to western and southern Iran (Mohammad et al., 2007). Bolton (1957) subdivided Iraqi Zagros thrust zone into four structural units from southwest to northeast as follows: 1. Folded foreland zone, about 200 km wide consisting of sedimentary rocks of Paleozoic to Tertiary and Quaternary ages. 2. Transitional zone, which is the site of accumulation of molasse sediments from marine to continental environments. 3. Qulqula zone, consisting of radiolarian mudstone, shale, thinly beded limestone. 4. Thrust zone, which is subdivided into three unit (Bolton, 1955, 1958), they are from bottom to top as follows: A. Naopurdan or Outer Zone (Palaeocene-Oligocene). It is represented by flysh sediment which was thrust over Qulqula serries without any dynamic metamorphism reaching a total thickness of 2000 m. B. Walash series or Intermediate Zone. It consists of three red bed units intercalated by two volcanic units, and is associated with some intraformational serpentinite bodies, with a total thickness of 3.7 km. The volcanic unit consists of metavolcanic spilite and andesite. The sedimentary beds are composed of red mudstone, siltstone, and shale. C. Qandil series or Inner Zone (Palaeocene-Eocene). It is represented by para-autochthons and regional metamorphic rocks (phyllite and calc-schist). 14
Page 1 and 2: PETROLOGY OF ULTRAMAFIC AND RELATED
Page 3 and 4: We certify that we read this thesis
Page 5 and 6: ABSTRACT Four main ultramafic rock
Page 7 and 8: CONTENTS Chapter 1: Background, Aim
Page 9 and 10: Chapter 7: Conclusions and Recommen
Page 11 and 12: Figure 3 - 10: Field photograph of
Page 13 and 14: albite - tremolite zone, E = albite
Page 15 and 16: Figure 6 - 19: Time-paragenesis, al
Page 17 and 18: Table 6 - 2: Representative microna
Page 19 and 20: 1 BACKGROUND 1-1 Ultramafic rocks U
Page 21 and 22: ocks of the belt. These attributes
Page 23 and 24: 1-1-3 Metamorphism of ultramafics M
Page 25 and 26: Reaction 1: Isochemical serpentiniz
Page 27 and 28: 1-2-2 Jadeitites Jadeitite is compo
Page 29: In combining the new data on the se
Page 33 and 34: 2-1-1 Geology of Penjwin area 2-1-1
Page 35 and 36: of Luta-Rash. Volcanic rocks are ex
Page 37 and 38: and a sandstone unit of the Paleoce
Page 39: Fig. 2-1: Tectonic subdivision of I
Page 42 and 43: Fig. 2-4: Field photograph of Gimo
Page 45 and 46: Chapter 3 Petrology of ultramafic r
Page 47 and 48: 3-1-2 Harzburgite Harzburgite is th
Page 49 and 50: 3-1-6 Serpentinite Two types of ser
Page 51 and 52: small amount of ilmenite. Hornblend
Page 53: In places, it is surrounded by fine
Page 62 and 63: 4 Mineralogy and mineral chemistry
Page 64 and 65: compositions with Mg-number ranging
Page 66 and 67: 4-3-4 Hydrous phases Hydrous phases
Page 68 and 69: Fig 4 -3: Compositions of chromian
Page 70 and 71: Fig 4 -6: Compositions of chromian
Page 72 and 73: Chapter 5 Discussions 55
Page 74 and 75: the tectonite region of the graph (
Page 76 and 77: involves loss and gain of CaO, SiO
Page 78 and 79: Fig. 5 - 1: Chromian spinel composi
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Fig. 5-3: Cr-number in spinel vs. F
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Chapter 6 Related rock 65
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plagioclase (Figs. 6 - 2 G,H) and z
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Plagioclase and ilmenite are the or
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2 CaAl 2 Si 2 O 8 (anorthite) + Na
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apatite grains, characterized by bl
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the rim. Estimated pressure - tempe
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16 clinozoisite + H 2 O. (16) From
Page 96 and 97:
metamorphism. It was also formed du
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Fig. 6 - 2: Photomicrographs and im
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Fig. 6 - 4: Backscattered electron
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Fig. 6 - 7: Line scan profile acros
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Fig. 6 - 9: Line scan profile of pa
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Fig. 6 - 11: (A) Backscatter electr
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Fig. 6 - 13: Field of the approxima
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Fig. 6 - 15: Whole rock chemical co
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Fig. 6 - 17: Whole rock chemical co
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Fig. 6 - 19: Time-paragenesis, albi
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1 Conclusions 1. The Iraqi Zagros T
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2 Recommendations for further works
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Arai, S., 1987. An estimation of th
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Chakhmouradian, A.R., Reguir, E.P.,
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Evans, B.W., Frost, B.R., 1975. Chr
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Kamenetsky, V., Crawford, A. J., an
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Morand, V.J., 1990. High chromium a
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Watson, E.B., Wark, D. A. and Thoma
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Table 4 - 1: Representative microna
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Table 4 -11: Representative microna
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Table 4 -13: Representative microna
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Research public activity Peer-revie
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petrology of ultramafic and related rocks along iraqi zagros thrust zone

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