Richards, S., Collins, W., Weibe, R. and Healy, B. 2007.   Field Trip to the Base of the Bega Batholith - Day One. In: (Eds.) Simon Richards, William J. Collins, R. A. Weibe, and B. Healy, Guide to the Base of a Batholith, Journal of the Virtual Explorer, Electronic Edition, ISSN 1441-8142, volume 26, paper 2, doi:10.3809/jvirtex.2007.00165

Field Trip to the Base of the Bega Batholith - Day One

Simon W. Richards

Earth Materials: Structure and Tectonic

Research School of Earth Sciences

The Australian National University

Canberra, ACT, 0200

Australia

William J. Collins

School of Earth and Environmental Sciences,

James Cook University

Townsville, Qld, 4811

Australia

R.A. Weibe

Department of Earth and Environment

Franklin and Marshall College

Lancaster, PA 17604-3003

USA

B. Healy

SRK Sydney

Level 6

44 Market Street

Sydney, NSW 2000

Australia

Abstract

This is the second in a series of three chapters in the "Field Trip to the Base of the Bega Batholith." See http://virtualexplorer.com.au/journal/2007/26/richards/ for the introduction and overview.

Keywords: Bega Batholith , Field Guide

Table of Contents

Geological Sites
Stop 1. Towamba River Crossing
The Kameruka Granodiorite – a spectacular granite
Composite dykes – part of the enclave forming process and also part of the pluton construction process
Synplutonic Microgranitoid (feeder) Dykes
Interpretation
Significance
Stop 2. Lower Wog Wog River Section
Schlieren Migmatites
Stop A. Granite Sheet close to the Base of Kameruka Pluton
Stop B. Opposing Senses of Movement in the Same Outcrop
Stop C. Asymmetric Xenolith
Stop D. Hybrid Zone
Chemistry of Hybridisation between Migmatite and Kameruka Pluton
Stop E. Synmagmatic Folding in Microgranitoid Feeder Dyke
Stop F. Composite dykes, silicic pipes, and causes of mafic-silicic hybridism Silicic Pipes
Geochemistry
List of Figures
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