Rock Magnetic Cyclostratigraphy

176 Pages·2014·6.11 MB·English

by  Kenneth P. Kodama, Linda A. Hinnov

RoCK MAgNETiC CyCloSTRATigRAP hy
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Rock MAgNEtic
cycloStRAtigRAphy
KENNETh P. KoDAMA
Department of Earth and Environmental Sciences, lehigh University,
Bethlehem, PA, USA
liNDA A. hiNNoV
Department of Earth and Planetary Sciences, Johns hopkins University,
Baltimore, MD, USA
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This edition first published 2015 © 2015 by John Wiley & Sons, ltd.
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Library of Congress Cataloging-in-Publication Data
Kodama, Kenneth P.
Rock magnetic cyclostratigraphy / Kenneth P. Kodama, linda A. hinnov.
pages cm
includes index.
iSBN 978-1-118-56128-7 (cloth)
1. Cyclostratigraphy. 2. Paleomagnetism. 3. geochronometry. i. hinnov, l. A.
(linda Alide) ii. Title.
QE651.5.K63 2015
551.7′01–dc23
2014025855
A catalogue record for this book is available from the British library.
Wiley also publishes its books in a variety of electronic formats. Some content that appears in
print may not be available in electronic books.
Cover image: Moonscape. original painting by Anna Kodama
Set in 10/12.5pt Minion by SPi Publisher Services, Pondicherry, india
1 2015
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Contents
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
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vi Contents
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
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Contents vii
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
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