Optically stimulated luminescence (OSL) dating in the Amazonian wetlands / edited by Sonia Hatsue Tatumi, Dilce de Fátima Rossetti, Emílio Alberto Amaral Soares.

Format:

Book

Contributor:

Tatumi, Sonia Hatsue, editor.

Rossetti, Dilce de Fátima, editor.

Soares, Emílio Alberto Amaral, editor.

Language:

English

Subjects (All):

Geochronometry.

Physical Description:

1 online resource (146 pages)

Edition:

1st ed.

Place of Publication:

Newcastle upon Tyne, England : Cambridge Scholars Publishing, [2020]

Summary:

Optically stimulated luminescence (OSL) dating has proven to be extremely useful for establishing the Late Quaternary chronological framework in many areas of the Brazilian territory. In this region dominated by tropical climate, OSL dating can be more extensively applied than radiocarbon dating due to the generally low potential for the preservation of organic matter in sedimentary samples. This problem is especially critical in areas of the Amazonian lowlands, because of the hot climate and high precipitation rates. The abundance of quartz grains deposited in fluvial and aeolian environments over this region favours OSL dating. More than 20 years of continuous and collaborative work has resulted in the creation of an extensive OSL age database for Late Quaternary sedimentary deposits in the Amazonian lowlands. This effort has contributed to improving the paleoenvironmental and paleoclimatic reconstructions of this region within this period. This book discusses the state of art of OSL dating of Late Quaternary deposits in the Amazonian lowlands, focusing on providing an introduction to dating principles using OSL, and defining the application of OSL techniques as a dating method. It also offers a statistical study and calculation of equivalent dose and annual dose rates, details the sampling and experimental apparatus, and considers the difficulties and adaptation techniques in dating Late Quaternary strata in the Amazonian lowlands.

Contents:

Intro

Table of Contents

Preface

Prologue

Chapter One

1.1 Introduction

1.2 The OSL theory

1.2.1 Principles

1.2.2 Band model applied to quartz OSL

1.2.3 OSL application in dating

1.2.4 Determination of equivalent dose - SAR protocol

1.2.5 Determination of annual dose rate

1.2.6 Results of the OSL dating technique applied to Amazonian sediments

1.2.6.1 Annual dose rates

Chapter Two

2.1 Presentation

2.2 Geology

2.2.1 General framework

2.2.2 Stratigraphy

2.2.3 Sediment types and depositional environments

2.3 Motivation to improve the chronological framework

2.3.1 Geological history of river basins

2.3.2 Basic geological mapping

2.3.3 Climatic versus neotectonic influence

2.3.4 Origin and evolution of the biodiversity

2.3.5 Global changes

Chapter Three

3.1 Presentation

3.2 Dating problems and methodological approach

3.2.1 Environmental restriction

3.2.2 Tropical weathering and pedogenesis

3.2.3 Water-table oscillation

3.2.4 Sediment deformation

Chapter Four

4.1 Presentation

4.2 Fluvial terraces

4.2.1 Strech of the Solimões-Amazon system between Codajás and Manaus

4.2.2 Low Negro River

4.2.3 Madeira River

4.2.4 Branco River

4.3 Viruá megafan

4.4 Aeolian dunes

Chapter Five

5.1 Improving the luminescence dating technique

5.2 Perspectives of research applications

5.3 Final remarks

References.

Notes:

Includes bibliographical references.

Description based on print version record.

Description based on publisher supplied metadata and other sources.

ISBN:

1-5275-5606-9

OCLC:

1164584054