Facies And Environmental Analysis Of Jaddala Formation (Middle-Late Eocene) For Selected Wells, North Iraq | ||
| Tikrit Journal of Pure Science | ||
| Article 1, Volume 17, Issue 4, December 2012, Pages 199-208 | ||
| Authors | ||
| Sabah A. Majeed; Lafta S. Kadhim; Abdullah S. Shihab | ||
| Abstract | ||
| This study was carried out for Jaddala Formation (Middle-Late Eocene). Microfacies in three fields ,north Iraq, Qaiyarah field (QY-54) , Ajeel field (AJ-10) and Pulkana field (PU-7). From petrography study, it was found that the Planktonic foraminifera forming the main skeletal grains such as (Globigerina and Morozovella), while the benthonic foraminifera such as (Rotalia and Nodosaria) in second order , and other fossils such as mollusca, radiolaria, and echinods in minor amount. The matrix formed of gray to light micrite. The rocks effected by diagenetic processes with many types like compaction, cementation, dissolution, neomorphism, replacement and authigenic minerals such as pyrite, glauconite, and phosphates, in addition to dolomitization recrystallization . microfacies analysis study, the recognized main facies are three ; Lime mudstone, Lime Wackstone and Lime Packstone. These facies divided into seven submicrofacies; planktonic foraminiferal lime mudstone (M1), silica lime mudstone (M2), planktonic foraminiferal lime wackstone (W1), bioclastic lime wackstone (W2), dolomatic lime wackstone (W3), planktonic foraminiferal lime packstone (P1) and bioclastic lime packstone (P2). Based on facies and petrographic studies, its deposited within three sedimentary environments are ; deep sea, deep shelf and toe-of-slope. | ||
| Keywords | ||
| Jaddala microfacies Petrograghy depositional environment | ||
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