petrology of ultramafic and related rocks along iraqi zagros thrust zone

Figure 4 – 6: Compositions of chromian spinel cores in dunite and
harzburgite of Mawat peridotite plotted on Cr 3+ - Al 3+ -
Fe 3+ cations diagram. ----------------------------------------------------------------53
Figure 4 – 7: Compositions of chromian spinel cores in
dunite,harzburgite and lherzolite of Pauza peridotite
plotted on Cr 3+ - Al 3+ - Fe 3+ cations diagram. --------------------53
Figure 4 – 8: Compositions of pyroxene in Pauza peridotite plotted
on En-Wo-Fs diagram (after Morimoto et al., 1988). -- 54
Figure 5 – 1: Chromian spinel compositions plotted on Cr# vs.
Mg#. Fields aftrer (Raymond, 2002). ---------------------------------61
Figure 5 – 2: Cyclic metamorphism of Chromian spinel in
harzburgite. -----------------------------------------------------------------------------------62
Figure 5 – 3: Cr# in spinel vs. Fo content of olivine in ultramafic
rocks from IZTZ. Fields for spinels occurring in abyssal
(and ocean ridge), oceanic SSZ and passivemargin
peridotites are after Dick and Bullen (1984) and
Pearce et al. (2000). OSMA field after Arai (1994). Pink
boxes are Pauza, gray boxes are Mawat, and yallow
triangles are Penjwin peridotites. ---------------------------------------63
Figure 5 – 4: Chromian spinel compositions plotted on TiO 2 vs.
Al 2 O 3 tectonic discrimination diagram. Fields for arc
volcanic rocks, supra-subduction zone (SSZ), ocean
island basalts (OIB), and MORB basalts and
peridotites after Kamentesky et al. (2001). ---------------------64
Figure 6 – 1: A. Field photograph showing the Albitite pod with
massive serpentinite in the Penjwin igneous complex.
B. Sketch showing different mineral zones in the
metarodingite pod, A = serpentinite host rock, B =
blackwall zone, C = grossular – prehnite zone, D =
VIII