Doctoral Dissertations

Keywords and Phrases

Arabian Shield; East Gondwana; Salalah Basement

Abstract

"The Salalah Crystalline Basement (SCB) is the largest Precambrian exposure in Oman located on the southern margin of the Arabian Plate at the Arabian Sea shore. This work used remote sensing, detailed structural analysis and the analysis of ten samples using 40Ar/39Ar age dating to establish the Precambrian evolution of the SCB by focusing on its central and southwestern parts. This work found that the SCB evolved through four deformational events that shaped its final architecture: (1) Folding and thrusting event that resulted in the emplacement of the Sadh complex atop the Juffa complex. This event resulted in the formation of possibly N-verging nappe structure; (2) Regional folding event around SE- and SW-plunging axes that deformed the regional fabric developed during the N-verging nappe structure and produced map-scale SE- and SW-plunging antiforms shaping the complexes into a semi-dome structure; (3) Strike-slip shearing event that produced a conjugate set of NE-trending sinistral and NW-trending dextral strike-slip shear zones; and (4) Localized SE-directed gravitational collapse manifested by top-to-the-southeast kinematic indicators. Deformation within the SCB might have ceased by 752.2 ± 2.7 Ma as indicated by an age given by an undeformed granite. The thermochron of samples collected throughout the SCB complexes shows a single cooling event that occurred between about 800 and 760 Ma. This cooling event could be accomplished by crustal exhumation resulting in regional collapse following the prolonged period of the contractional deformation of the SCB. This makes the SCB a possible metamorphic core complex."--Abstract, page iii.

Advisor(s)

Abdel Salam, Mohamed G.

Committee Member(s)

Hogan, John Patrick
Gao, Stephen S.
Yang, Wan
Gertsch, Leslie S.

Department(s)

Geosciences and Geological and Petroleum Engineering

Degree Name

Ph. D. in Geology and Geophysics

Sponsor(s)

Kuwait. Public Authority for Applied Education and Training

Publisher

Missouri University of Science and Technology

Publication Date

Spring 2014

Pagination

x, 79 pages

Note about bibliography

Includes bibliographical references (pages 76-78).

Geographic Coverage

Oman
Salalah (Oman)

Rights

© 2014 Hanadi Abulateef Al-Doukhi, All rights reserved.

Document Type

Dissertation - Open Access

File Type

text

Language

English

Subject Headings

Geology, Stratigraphic -- Precambrian
Crystalline rocks -- Oman -- Salalah
Geology, Structural -- Oman -- Salalah
Radioactive dating

Thesis Number

T 10433

Electronic OCLC #

882475901

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