Geochemistry and Stratigraphic Relations of Middle Proterozoic Rocks of the New Jersey Highlands
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FOLD Volkert and Drake— MIDDLE PROTEROZOIC ROCKS OF THE NEW JERSEY HIGHLANDS—U.S. Geological Survey Professional Paper 1565–C Volkert U.S. Department of the Interior U.S. Geological Survey Geochemistry and Stratigraphic Relations of Middle Proterozoic Rocks of the New Jersey Highlands U.S. GEOLOGICAL SURVEY PROFESSIONAL PAPER 1565–C Prepared in cooperation with the New Jersey Geological Survey Printed on recycled paper Availability of Publications of the U.S. Geological Survey Order U.S. Geological Survey (USGS) publications by calling Documents. Check or money order must be payable to the the toll-free telephone number 1–888–ASK–USGS or contact- Superintendent of Documents. Order by mail from— ing the offices listed below. 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Minerals information is available electronically at http://minerals.er.usgs.gov/minerals/ Electronically Subscription to the catalog “New Publications of the U.S. Some USGS publications, including the catalog “New Publica- Geological Survey” tions of the U.S. Geological Survey,” are also available elec- tronically on the USGS’s World Wide Web home page at Those wishing to be placed on a free subscription list for the http://www.usgs.gov catalog “New Publications of the U.S. Geological Survey” should write to— Preliminary Determination of Epicenters U.S. Geological Survey Subscriptions to the periodical “Preliminary Determination of 903 National Center Epicenters” can be obtained only from the Superintendent of Reston, VA 20192 U.S. Department of the Interior U.S. Geological Survey Geochemistry and Stratigraphic Relations of Middle Proterozoic Rocks of the New Jersey Highlands By Richard A. Volkert and Avery Ala Drake, Jr. U.S. GEOLOGICAL SURVEY PROFESSIONAL PAPER 1565–C Prepared in cooperation with the New Jersey Geological Survey New Jersey Highlands Middle Proterozoic rocks include sodic basement rocks of the Losee Metamorphic Suite and an unconformably overlying metasedimentary sequence intruded by synkinematic granitoids (~1,090 Ma) and postkinematic granite (1,020 Ma) GEOLOGIC STUDIES IN NEW JERSEY AND EASTERN PENNSYLVANIA U.S. DEPARTMENT OF THE INTERIOR BRUCE BABBITT, Secretary U.S. GEOLOGICAL SURVEY CHARLES G. GROAT, Director UNITED STATES GOVERNMENT PRINTING OFFICE, WASHINGTON : 1999 Published in the Eastern Region, Reston, Va. Manuscript approved for publication October 27, 1998. Any use of trade, product, or firm names in this publication is for descriptive purposes only and does not imply endorsement by the U.S. Government. For sale by U.S. Geological Survey Information Services Box 25286, Federal Center Denver, CO 80225 Library of Congress Cataloging in Publication Data Volkert, Richard A. Geochemistry and stratigraphic relations of Middle Proterozoic rocks of the New Jersey Highlands / by Richard A. Volkert and Avery Ala Drake, Jr. p. cm.—(Geologic studies in New Jersey and eastern Pennsylvania ; C) (U.S. Geological Survey professional paper ; 1565) “Prepared in cooperation with the New Jersey Geological Survey.” Includes bibliographical references. Supt. of Docs. no.: I 19. 16 : 1565–C 1. Geology, Stratigraphic—Proterozoic. 2. Geology—New Jersey—New Jersey Highlands. 3. Geochemistry—New Jersey—New Jersey Highlands. I. Drake, Avery Ala, 1927– . II. New Jersey Geological Survey. III. Title. IV. Series. V. Series: U.S. Geological Survey professional paper ; 1565. QE141.G46 1995 vol. C [QE653.5] 557.49 s—dc21 98–53233 [551.7' 15' 09749] CIP CONTENTS Abstract ........................................................................................................................... C1 Introduction .................................................................................................................... 1 Acknowledgments................................................................................................... 3 Basement Rocks.............................................................................................................. 3 Losee Metamorphic Suite ....................................................................................... 3 Dacitic, Tonalitic, and Trondhjemitic Rocks................................................... 3 Charnockitic Rocks ......................................................................................... 5 Supracrustal Rocks.......................................................................................................... 9 Quartzofeldspathic Gneiss ...................................................................................... 10 Potassium-Feldspar Gneiss ............................................................................. 10 Microcline Gneiss ........................................................................................... 10 Monazite Gneiss.............................................................................................. 11 Biotite-Quartz-Feldspar Gneiss....................................................................... 12 Hornblende-Quartz-Feldspar Gneiss............................................................... 13 Metaquartzite .......................................................................................................... 13 Calc-Silicate Gneiss ................................................................................................ 13 Clinopyroxene-Quartz-Feldspar Gneiss ......................................................... 14 Diopsidite ....................................................................................................... 15 Pyroxene Gneiss ............................................................................................. 15 Epidote-Bearing Gneiss.................................................................................. 16 Marble.................................................................................................................... 17 Stratigraphic Relations and Tectonic Setting......................................................... 17 Intrusive Rocks................................................................................................................ 20 Vernon Supersuite.................................................................................................. 21 Byram Intrusive Suite ..................................................................................... 21 Lake Hopatcong Intrusive Suite...................................................................... 23 Similarity of Byram and Lake Hopatcong Intrusive Suites............................ 23 Mount Eve Granite................................................................................................ 25 Other Rocks.....................................................................................................................25 Amphibolites........................................................................................................