Series	Geological Survey professional paper 251 Geological Survey professional paper 251. ^A16492
Contents	Abstract -- Introduction -- Previous work -- Present work -- Acknowledgments -- Geography -- Location and accessibility -- Topography -- Climate, water supply, and vegetation -- History and production -- Geology -- Bedded rocks -- Limestone -- Calcareous schist -- Quartz-mica schist -- Greenstone schist -- Intrusive rocks -- Granodiorite and related rocks -- Structure -- Petrography and petrology -- Composition -- Igneous suite from the Jumbo basin and vicinity -- Monzonite, granodiorite, and quartz diorite -- Contaminated rocks -- Gabbroic rocks -- Distribution of rocks types within the stock -- Comparison of rocks of intrusive stock with rocks of the Coast Range batholith -- Igneous rocks in relation to ore deposits -- Dike rocks -- Distribution -- Varieties -- Age -- Structure -- Regional features -- Local features -- Folds -- Faults -- Contact metamorphism -- Distribution of the skarn rocks -- Marmorization -- Metamorphism in the vicinity of the Magnetite Cliff bodies -- General relations -- Exomorphism of the marble -- Localization of the metamorphic products -- Mineralogy, paragenesis, and textural relations -- Chemical changes -- Criteria for the distinction of metamorphic products -- Metamorphism of the schists -- Metamorphism of the dike rocks -- Metamorphism in the vicinity of the upper magnetite bodies -- Exomorphism of the marble -- Endomorphism of the intrusive rocks -- Metamorphism in the vicinity of the Jumbo mine -- Exomorphism of the marble -- Endomorphism of the intrusive rocks -- Metamorphism of the dike rocks -- Metamorphism of schists, northeast slope, Jumbo basin -- Contrasts between the skarn zones -- Genesis of contact-metamorphic deposits, Jumbo basin -- Existing views of contact metamorphism -- Time of contact metamorphism, Jumbo basin -- Source of contact-metamorphosing solutions -- State of contact-metamorposing solutions -- Reactions with carbonate rocks -- Channelways of the contact-metamorposing solutions -- Origin of sharp contacts -- Classification of the Jumbo basin contact-metamorphic deposits -- Mineral deposits of the Jumbo basin -- Magnetic survey -- Applicability -- Field methods -- Magnetic data and interpretation -- General features -- Anomalies in the vicinity of the Magnetite Cliff bodies -- Anomalies in the vicinity of the upper magnetite bodies -- The deposits -- Magnetite Cliff bodies and vicinity -- Geology -- Structure -- Ore deposits -- Reserves -- Tonnage -- Grade -- Upper magnetite bodies -- Geology -- Ore deposits -- Reserves -- Jumbo mine -- Mine workings -- Geology -- Structure -- Ore deposits -- Reserves -- Suggestions for prospecting -- Bibliography -- Index.
Abstract	A discussion of the contact metamorphism, geomagnetic surveys, magnetite deposits, and iron ore reserves of part of Prince of Wales Island.
Local note	Joyner- FOR JOYNER LIBRARY HOLDINGS OF THE SERIES, GEOLOGICAL SURVEY PROFESSIONAL PAPER, SEARCH BY CALL NUMBER QE75 .P9.
General note	Part of illustrative material in pocket.
General note	"A discussion of the contact metamorphism, geomagnetic surveys, magnetite deposits, and iron ore reserves of part of Prince of Wales Island."
Bibliography note	Includes bibliographical references (pages 42-44).
Issued in other form	Online version: Kennedy, George C. (George Clayton), 1919-. Geology and mineral deposits of Jumbo Basin, southeastern Alaska
LCCN	gs 53000146
GPO item number	0624
Govt. docs number	I 19.16:251

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