Grade and tonnage model of Porphyry Cu deposits in British Columbia, Canada, and Alaska, U.S.A.
By: by W. David Menzie and Donald A. Singer.
Contributors: Singer, D. A.; Geological Survey (U.S.)
Series: Open-file report -- 93-275.; U.S. Geological Survey open-file report -- 93-275.
Publisher: U.S. Geological Survey
Published: 1993
Place of publication: Reston, VA
Language: eng
Subjects: Porphyry -- North America.; Copper ores -- North America.; Ore deposits -- North America.
Notes: Cover title.

Includes bibliographical reference (leaf [1]).