oxygen and hydrogen isotope study of serpentinized peridotite rocks, thrust zone, north east iraq
Iraqi National Journal of Earth Sciences,
2007, Volume 7, Issue 1, Pages 13-20
AbstractThis study concentrates on two serpentinite bodies (Mawat and Penjwin) within
Zagros Thrust Zone, North East Iraq. The Mawat Serpentinite which represents lherzolite
protolith show δ18O of 6.77 – 8.33 %o and δD values of (-65) - (-61) %o. The Penjwin
serpentinite (harzburgite protolith) show δ18O values of 10.90 – 13.29 %o and δD values
of (-74) – (-69) %o. Mawat serpentinization occurred by hydration of mantle wedge rocks
along intraoceanic supra-subduction zone at temperature of 150 – 200 oC. On the other
hand Penjwin serpentinization occurred during and after emplacement of Penjwin
ophiolite suite at temperature of 50 – 100 oC. Emplacement of Mawat serpentinite as an
isolated body into Walash volcano-sedimentary sequence took place by diapiric process.
Penjwin serpentinite was emplaced due to tectono-metamorphic event.
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