Mineral Deposit Evaluation A practical approach

Although aspects of mineral deposit evaluation advantages and disadvantages of each technique are covered in such texts as McKinstry (1948), so that a judgement can be made as to their Peters (1978), Reedman (1979) and Barnes applicability to a particular

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Mineral Deposit Evaluation A practical approach

Alwyn E. Annels Department of Geology , University of Wales, Cardiff

CHAPMAN & HALL London . New York· Tokyo· Melbourne· Madras

UK

Chapman & Hall, 2-6 Boundary Row, London SEl 8HN

USA

Van Nostrand Reinhold, 115 5th Avenue, New York NY10003

JAPAN

Chapman & HallJapan, Thomson PublishingJapan, Hirakawacho Nemoto Building, 7F, 1-7-11 Hirakawa-cho, Chiyoda-ku, Tokyo 102

A USTRALIA

Chapman & Hall Australia, Thomas Nelson Australia, 102 Dodds Street, South Melbourne, Victoria 3205

INDIA

Chapman & Hall India, R. Seshadri, 32 Second Main Road, CIT East, Madras 600 035 First edition 1991

©

1991 A.E. Annels Softcover reprint of the hardcover 1st edition 1991 Typeset in 10/12pt Bembo by Acorn Bookwork, Salisbury ISBN 978-94-011-9716-8 ISBN 978-94-011-9714-4 (eBook) DOI 10.1007/978-94-011-9714-4

Apart from any fair dealing for the purposes of research or private study, or criticism or review, as permitted under the UK Copyright Designs and Patents Act, 1988, this publication may not be reproduced, stored, or transmitted, in any form or by any means, without the prior permission in writing of the publishers, or in the case of reprographic reproduction only in accordance with the terms of the licences issued by the Copyright Licensing Agency in the UK, or in accordance with the terms oflicences issued by the appropriate Reproduction Rights Organization outside the UK. Enquiries concerning reproduction outside the terms stated here should be sent to the publishers at the UK address printed on this page. The publisher makes no representation, express or implied, with regard to the accuracy of the information contained in this book and cannot accept any legal responsibility or liability for any errors or omissions that may be made.

British Library Cataloguing in Publication Data Annels, Alwyn E. Mineral deposit evaluation: A practical approach. I. Title 553 ISBN 978-94-011-9716-8

Library ofCongress Cataloging-in-Publication Data Annels, Alwyn E. Mineral deposit evaluation: a practical approach/Alwyn E. Annels. -1st ed. p. cm. Includes bibliographical references and index. ISBN 978-94-011-9716-8

1. Mine valuation. TN272.A56 1991 622' .1-dc20

I. Title.

90-2454 CIP

To my wife Anita For her patience and tolerance during the writing oj this book.

Contents

PREFACE ACKNOWLEDGEMENTS 1

2

REPRESENTATION OF MINE DATA

page

Xl XIV

1

Introduction 1.1 Mine nomenclature 1.2 Subdivision of orebodies 1.3 Mine sections 1.4 Mine plans 1.5 Vertical longitudinal projections 1.6 Structure contour plans 1.7 Connolly diagrams 1.8 Dip contour maps 1.9 1.10 Structural unrolling - Palinspastic maps 1.11 2D and 3D block models 1.12 3D orebody projections 1.13 Histograms and cumulative frequency plots 1.14 Rose diagrams 1.15 Stereographic projections 1.16 Computer software

1 1 4 6 9 14 17 21 22 24 27 27 28 28 29 29

MINE SAMPLING

43

2.1 2.2 2.3 2.4

Introduction Characterization of mineral deposits for sampling purposes Grade elevation Possible locations for underground sampling