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Rock Magnetic Cyclostratigraphy (eBook)

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2014 | 1. Auflage
176 Seiten
John Wiley & Sons (Verlag)
978-1-118-56130-0 (ISBN)

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Rock Magnetic Cyclostratigraphy - Kenneth P. Kodama, Linda A. Hinnov
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Rock magnetic cyclostratigraphy merges environmental magnetism,
in which rock magnetic measurements are used to detect past
environmental change, and cyclostratigraphy, in which cyclic
variations of lithology or a sedimentary rock's physical
properties are related to astronomically-forced paleoclimate
change. In addition to providing paleoclimate data,
cyclostratigraphy can establish high-resolution chronostratigraphy
for a sequence of sedimentary rocks, even at distant times in
Earth's history. This book provides an overview of concepts
underlying these two techniques, recipes for the time series
analysis of cyclostratigraphy, and case studies to illustrate the
variety and breadth of problems addressed by rock magnetic
cyclostratigraphy.

New Analytical Methods in Earth and Environmental
Science

Because of the plethora of analytical techniques now available, and
the acceleration of technological advance, many earth scientists
find it difficult to know where to turn for reliable information on
the latest tools at their disposal, and may lack the expertise to
assess the relative strengths or limitations of a particular
technique. This new series will address these difficulties by
providing accessible introductions to important new techniques, lab
and field protocols, suggestions for data handling and
interpretation, and useful case studies. The series represents an
invaluable and trusted source of information for researchers,
advanced students and applied earth scientists wishing to
familiarise themselves with emerging techniques in their
field.

All titles in this series are available in a variety of
full-colour, searchable e-book formats.

Kenneth P. Kodama is Professor of Earth and Environmental Sciences at Lehigh University, USA. He has taught Earth sciences and conducted paleomagnetic and rock magnetic research with his students at Lehigh for the past 36 years. In his time away from paleomagnetism he enjoys playing music. Linda A. Hinnov is a research Professor at Johns Hopkins University, USA specializing in the astronomical forcing of Earth's paleoclimate system. She has longstanding interests in cyclostratigraphy, and its implications for the evolution of Earth's geophysical and astronomical parameters and the geologic time scale.

1 Introduction 1

1.1 Rock Magnetic Cyclostratigraphy 1

1.2 Basic Steps of a Rock Magnetic Cyclostratigraphy Study 4

1.3 The Significance of Rock Magnetic Cyclostratigraphy 6

1.4 Layout of the Book 7

References 8

2 Rock Magnetism 10

2.1 Introduction 10

2.2 Types of Magnetism 12

2.3 Ferromagnetic Minerals 16

2.4 Fine Particle Magnetism 20

2.4.1 Hysteresis 20

2.4.2 Magnetic Particle Anisotropy 24

2.4.3 Domain State 25

2.5 Environmental Magnetic Parameters 26

2.5.1 Individual Environmental Magnetic Parameters 26

2.5.2 Ratios of Environmental Magnetic Parameters 29

2.6 Identification of Magnetic Mineralogies and Choosing a Rock Magnetic Parameter for Cyclostratigraphy 31

References 32

3 Magnetostratigraphy 35

3.1 Introduction 35

3.2 Measuring Magnetostratigraphy 37

3.2.1 Sampling Strategy 37

3.2.2 Sample Collection 37

3.2.3 Measurement and Demagnetization 38

3.2.4 Tests to Constrain the Age of Remanence 41

3.2.5 Plotting of Magnetostratigraphic Data and Determining a Reversal Stratigraphy 42

3.3 Tying to the GPTS 46

3.4 Providing the Best Time Resolution from Magnetostratigraphy 49

References 49

4 Time Series Analysis for Cyclostratigraphy 52

4.1 Introduction 52

4.2 Geological Time Series 53

4.3 Time Series Analysis Tools and Eocene Arguis Rock Magnetic Cyclostratigraphy 54

4.3.1 Sampling and Interpolation 54

4.3.2 Detrending, Smoothing, and "Prewhitening" 56

4.3.3 Filtering Basics 56

4.3.4 Digital Filters 58

4.3.5 Spectral Analysis 58

4.3.6 Hypothesis Testing and Noise Modeling 73

4.3.7 Time-Frequency Analysis 81

4.3.8 Coherency and Cross-Phase Analysis 83

References 87

5 Milankovitch Forcing Theory 90

5.1 Introduction 90

5.2 Astronomical Parameters 90

5.3 Insolation 93

5.4 Astronomical Tuning and Timescales 93

5.4.1 The Initial Timescale 93

5.4.2 Traditional Astronomical Tuning 96

5.4.3 Objective Astronomical Tuning 97

References 97

6 Case Studies of Rock Magnetic Cyclostratigraphy 99

6.1 Introduction and Environmental Shredding 99

6.2 Stirone River Section, Northern Italy 101

6.3 Arguis Formation, Spanish Pyrenees 104

6.4 Cupido Formation Platform Carbonates, Northeastern Mexico 107

6.5 Latemar Massif, Triassic Carbonates, Northern Italy 111

6.6 Daye Formation, Triassic Carbonates, South China 113

6.7 Mauch Chunk Formation: Mississippian Red Beds, Pottsville, Pennsylvania 117

6.8 Rainstorm Member of the Neoproterozoic Johnnie Formation, Death Valley, California 119

6.9 Encoding of Orbitally Forced Climate Signals 123

References 124

7 Doing Rock Magnetic Cyclostratigraphy 128

7.1 Study Design 128

7.2 Field Sampling 131

7.3 Laboratory Preparation 132

7.4 Remanence Measurements 134

7.5 Time Series Analysis: Summary of Procedures 137

7.5.1 Preparation of the Data Series 138

7.5.2 Spectral Estimation 138

7.5.3 Significance of the Spectral Peaks 139

7.5.4 Evolutionary Spectrogram 140

7.5.5 Tuning and Filtering 140

7.6 Identifying Astronomically Forced Climate Cycles 141

References 143

Appendix 145

Glossary 157

Index 161

Erscheint lt. Verlag 4.9.2014
Reihe/Serie Analytical Methods in Earth and Environmental Science
Sprache englisch
Themenwelt Naturwissenschaften Geowissenschaften Geologie
Technik
Schlagworte earth sciences • Geochemie, Mineralogie • Geochemistry & Minerology • Geowissenschaften • Sedimentologie u. Stratigraphie • Sedimentology & Stratigraphy • Stratigraphie
ISBN-10 1-118-56130-9 / 1118561309
ISBN-13 978-1-118-56130-0 / 9781118561300
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