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Full Description
Optical dating is a rapidly developing technique, used primarily in the dating of sediments deposited in the last 500,000 or more years. As such increasing numbers of Quaternary geologists, physical geographers, archaeologists, and anthropologists are now relying on the results produced. Written by one of the foremost experts on optical dating, this book aims to bring together in a coherent whole the various strands of research that are ongoing in the area. It gives beginners an introduction to the technique as well as acting as a valuable source of up to date references. The text is divided into three parts; main text, technical notes and appendices. In this way the main text is accessible by those researchers with a limited knowledge of physics, with the technical notes providing depth of understanding for those who require it. The first part of the book is concerned with basic notions and an introduction to the standard techniques, as well as several illustrative case histories. It goes on to then discuss the limitations of the technique and factors affecting reliability.
Contents
Chapter 1: Introduction ; Chapter 2 ; 2.1 Natural radioactivity ; 2.2 The natural dose-rate ; 2.3 Evaluation of dose-rate ; 2.4 Artificial irradiation ; 2.5 Dependence on rate at which dose is delivered, and on temperature ; Chapter 3 ; 3.1 Sample collection ; 3.2 Preparation of aliquots for OSL measurement ; 3.3 Measurement of OSL ; Chapter 4 ; 4.1 Unwanted signals: backgrounds and residuals ; 4.2 Irradiation and preheating ; 4.3 Multi-aliquot methods ; 4.4 The single-aliquot ; Chapter 5 ; 5.1 Aeolian deposits ; 5.2 Water-laid sediment ; 5.3 Organic-rich sediment ; 5.4 Glaciation-related deposits ; 5.5 Earthquake-related studies ; 5.6 Two unusual applications ; 5.7 Applications other than sediment dating ; Chapter 6 ; 6.1 Factors affecting rapidity of bleaching ; 6.2 The level reached ; 6.3 Intrinsic indications about zeroing - analysis of the shine-down curve ; 6.4 Other intrinsic indications about zeroing ; Chapter 7 ; 7.1 Thermal transfer ; 7.2 Shine-curve analysis revisited ; 7.3 Reasons for preheating ; 7.4 Preheating of feldspars and polymineral fine-grains ; 7.5 Preheating of quartz ; 7.6 Quartz preheating and sensitivity change ; 7.7 Retention lifetimes
