<abstract xml:lang="en" xmlns="http://www.w3.org/1999/xhtml"><p>In the Wahiba Sands of eastern Oman, luminescence dating of sands enables us to relate wind activity to climatic variations and the monsoon cycle. These changes resulted from Polar glacial/interglacial cyclicity and changes in global sea levels and wind strengths. Luminescence dates show that development of the Sands began over 230 ka ago when the sand-driving winds were the locally arid, northward-blowing SW Monsoon.</p><p>During late Quaternary low sea levels, the Tigris-Euphrates river system flowed across the floor of the Persian/Arabian Gulf to the Gulf of Oman SE of the Strait of Hormuz. OSL-dated sands containing calcareous bioclastic fragments deflated from the exposed Gulf floor during glacial low-water periods indicate that during the last glacial cycle, and at least one earlier cycle (∼120–200 ka and possibly as far back as 291 ka), the floor of the Arabian Gulf was exposed. This is deduced from the presence of aeolian dune sands containing bioclastic detritus on the coastal plain of the Emirates and south into Al Liwa (Abu Dhabi), which were built by northern “Shamal” winds. Those calcareous sands now locally overlie sabkhas formed during interglacial high sea levels. Within the present interglacial, marine flooding of the Gulf occurred between about 12 and 6 ka.</p></abstract>

In the Wahiba Sands of eastern Oman, luminescence dating of sands enables us to relate wind activity to climatic variations and the monsoon cycle. These changes resulted from Polar glacial/interglacial cyclicity and changes in global sea levels and wind strengths. Luminescence dates show that development of the Sands began over 230 ka ago when the sand-driving winds were the locally arid, northward-blowing SW Monsoon.During late Quaternary low sea levels, the Tigris-Euphrates river system flowed across the floor of the Persian/Arabian Gulf to the Gulf of Oman SE of the Strait of Hormuz. OSL-dated sands containing calcareous bioclastic fragments deflated from the exposed Gulf floor during glacial low-water periods indicate that during the last glacial cycle, and at least one earlier cycle (∼120–200 ka and possibly as far back as 291 ka), the floor of the Arabian Gulf was exposed. This is deduced from the presence of aeolian dune sands containing bioclastic detritus on the coastal plain of the Emirates and south into Al Liwa (Abu Dhabi), which were built by northern “Shamal” winds. Those calcareous sands now locally overlie sabkhas formed during interglacial high sea levels. Within the present interglacial, marine flooding of the Gulf occurred between about 12 and 6 ka.

Geological importance of luminescence dates in Oman and the Emirates: An overview

Department of Geology, School of Geosciences, King’s College, University of Aberdeen, Aberdeen, AB24 3UE, UK

Petroleum Development Oman, POB 81, PC 113, Muscat, Oman

Shell Technology, Shell Development Oman LLC, P.O. Box 74, P.C. 116, Mina Al-Fahal, Muscat, Sultanate of Oman

Desert Research Institute, Reno, Nevada, USA

Department of Geological Sciences, University of Manitoba, Winnipeg, Manitoba, Canada, R3T 2N2

Physical Research Laboratory, Navarangpura, Ahmedabad, 380 009, India

Geology Division, Mangdechhu HE Project, NHPC Ltd, Trongsa, Bhutan, 33001

Geochronometria

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

In the Wahiba Sands of eastern Oman, luminescence dating of sands enables us to relate wind activity to climatic variations and the monsoon cycle. These...

Geological importance of luminescence dates in Oman and the Emirates: An overview

Published Online: Jun 19, 2011

Page range: 259 - 271

DOI: https://doi.org/10.2478/s13386-011-0037-2

Keywords
Oman, Wahiba Sands, Emirates, Al Liwa, dune sands, Persian Gulf

© 2011 Silesian University of Technology, Gliwice, Poland

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Geological importance of luminescence dates in Oman and the Emirates: An overview

Published Online: Jun 19, 2011

Page range: 259 - 271

DOI: https://doi.org/10.2478/s13386-011-0037-2

KeywordsOman, Wahiba Sands, Emirates, Al Liwa, dune sands, Persian Gulf

© 2011 Silesian University of Technology, Gliwice, Poland

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Keywords
Oman, Wahiba Sands, Emirates, Al Liwa, dune sands, Persian Gulf