1. a Department of Geology , Cairo University , Giza , 12613 , Egypt
2. b Ministry of Petroleum and Mineral Resources , Nasr City , Cairo , Egypt
3. c Department of Earth and Environmental Sciences , University of Windsor , Windsor , ON , Canada , N9B 3P4
4. d Department of Geology , Miami University , Oxford , OH , 45056 , USA
5. e State Key Laboratory for Geological Processes and Mineral Resources , China University of Geosciences , Wuhan , 430074 , China
6. f Three Gorges Geohazard Research Centre, Ministry of Education , China University of Geosciences , Wuhan , 430074 , China