The Field Description of Metamorphic Rocks

ISBN-13: 9781118618752 / Angielski / Miękka / 2022 / 192 str.

B Mark (Virginia Polytechnic Institute and State University

Spis treści

Preface viiAcknowledgments ix1 Introduction and Occurrence 11.1 The Importance of Fieldwork in Metamorphic Terrains 11.2 Understanding Metamorphism; Pressure/Temperature Relationships 41.3 Mode of Occurrence of Metamorphic Bodies 41.4 Summary 132 Field Skills and Mapping Outcrop Structures 172.1 Equipment 172.2 Preparing Maps and Basic Mapping 192.3 Notebooks and Data Recording 202.4 Digital 3D Outcrop Mapping 333 Metamorphic Minerals, Rock Types, and Classification 373.1 Minerals 373.2 The Basic Classification of Metamorphic Rocks in P-T 463.3 Metamorphic Rock Names 483.4 Reporting Rock Types 503.5 Compositional Category and Metamorphic Grade 544 Understanding Textures and Fabrics 1: Banding, Cleavage, Schistosity, and Lineations 674.1 General Terminology 674.2 Rocks without a Metamorphic Directional Fabric 714.3 Banding 714.4 The Development of Fabric, Cleavage, Schistosity, and Lineations 794.5 Refraction, Kinking, and Shearing of Fabrics 884.6 Deformation Fabrics and Folds 895 Understanding Textures and Fabrics 2: Metamorphic Crystals, Pseudomorphs, and Scattered Entities 955.1 Recording Metamorphic Textures 955.2 Metamorphic Crystal Growth and Porphyroblasts 975.3 Boudins, Shear Pods, and Knockers 1096 Contacts, Reaction Zones, and Veins 1156.1 Igneous Contacts - Aureoles and Metasomatism 1156.2 Veins and Pegmatites 1246.3 Reaction Zones and Chemical Changes at Contacts 1307 Faults, Mylonites, and Cataclasites 1377.1 Fault and Shear Zone Types 1377.2 Faults and Fault Breccias 1387.3 Cataclasites and Pseudotachylites 1417.4 Mylonites and Shear Zones 1448 Summary Tables, Checklists, and Mapping Report Advice 1518.1 Compositional Categories and Their Grade Indicators 1518.2 Minerals 1578.3 Further Mapping Advice; Formations, Markers, and a Final Report 164Checklist of Rock Features 171Further Reading Suggestions 173Index 175

O autorze

Dougal Jerram, University of Oslo, Norway and DougalEARTH Ltd, Solihull, UK.Mark Caddick, Virginia Tech, Blacksburg, VA, USA.