A neotectonic map of Iraq was constructed according partly to the work of Soviet team during eighties of the last century. The lower surfaces of Upper Miocene are chosen to be a datum for the construction. This is because the mentioned datum was considered to be surfaces or phase of tectonic stability leading one to calculate the intensities of down warping and up warping movements with their associated rates. The mentioned intensities and rates are represented by isoclines on the constructed map.The constructed map depended on relatively recent available data from oil wells and surface geological surveying Four supplementary maps established surrounding the constructed map for the purpose of comparison.
Literatures survey indicates that no such study carried out concerning strain measurement and analysis in the concerned area. The well-known field and laboratory work carried out. An accurate ellipse was determined for each ab, bc and ac planes for each formation exposed in Baba dome using Matlab program with a relatively new toolbox (Polylx). Then for each sample the mentioned ellipses was mathematically compiled to generate strain ellipsoid with long, intermediate and short axes with their orientations using Mathcad software. Then the long and short axes of strain ellipsoids projected on ab plane and delineated. Because Baba dome took the present form during last phase of Alpine Orogeny (Miocene -Pliocene) with contemporaneous deposition of Mio-Pliocene formations, the present study deduced that thestrain is directly proportional to the stress i.e. elastic deformation. Therefore, the orientation of short axes of strain ellipsoids should coincide with orientation of maximum stress axes giving rise the orientation of maximum stress direction in sampled station.
The present work involves detailed study for joints in Baba dome within the foreland fold belt of north Iraq. It aims to identification and classification of various joint sets and systems, extraction predominant directions of joint sets and systems and estimation stress direction in the study area. The study includes only Injana (Miocene) and Mukdadiya (Pliocene) formations. The field work has been executed by means of nine traverses, each of them includes mainly two stations, as a result, 719 measurements of joint planes were extracted. The study comprises several categories: carefully scanning the joint plane for any shear movement, measuring the attitude, classification of joints according to tectonic axes a, b and c, determining the predominant direction, calculation of causative stress, estimation the structural history of Baba Dome .The types of joint which distinguished are (ab, bc, ac, hko system acute about a, hko set acute about b, hol system acute about a and hkl set).All measured joints have no visible shear displacement on their planes. The hko system and hol system appeared as single set and as conjugate system. The predominant direction of the joints is determined to be nearly along the strike of exposed beds. The mean causative stress direction is calculated to be: 046° from hko system and 315° from hol system. Trend of measured joints (ab = 315° , ac = 045° , bc = 315° , hko 1 >a = 058° , hko 2 >a = 033° , hko 3 >b = 336° , hol 1 >a = 316° , hol 2 >a = 312° and hkl = 257°). An attempt to put the measured joints in order according to timing sequence and from older to younger: hko system acute about a &ac set, hol system acute about a and hko system acute about b &bc set.
This paper evaluates the suitability of using some flood plain deposit between Samara and Tikrit as impervious blanket to prevent the leakage of water. The scope of work includes: engineering geological evaluation of the study area, picking and testing samples and the final decision to accept or reject the sampled area according to well-known standards.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
customersupport@researchsolutions.com
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.