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##### U.S. Geological SurveyProfessional Paper 1760

# Studies by the U.S. Geological Survey in Alaska, 2007

### *Edited by* Peter J. Haeussler and John P. Galloway

### 2009

Massive sphalerite with discordant pale zones in a quartz-carbonate gangue (from Chapter A, Figure 10C)

**Summary**

The collection of papers that follow continues the series of U.S. Geological Survey (USGS) investigative reports in Alaska under the broad umbrella of the geologic sciences. This series represents new and sometimes-preliminary findings that are of interest to Earth scientists in academia, government, and industry; to land and resource managers; and to the general public. The reports presented in *Studies by the U.S. Geological Survey in Alaska* cover a broad spectrum of topics from various parts of the State, serving to emphasize the diversity of USGS efforts to meet the Nation's needs for Earth-science information in Alaska. This professional paper is one of a series of “online only” versions of *Studies by the U.S. Geological Survey in Alaska*, reflecting the current trend toward disseminating research results on the World Wide Web with rapid posting of completed reports. 

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Professional Paper 1760-A: Cynthia Dusel-Bacon, John F. Slack, John N. Aleinikoff, and James K. Mortensen, *Mesozoic Magmatism and Base-Metal Mineralization in the Fortymile Mining District, Eastern Alaska—Initial Results of Petrographic, Geochemical, and Isotopic Studies in the Mount Veta Area*

Professional Paper 1760-B: James B. Chapman, Peter J. Haeussler, and Terry L. Pavlis, *Quaternary Uplift History of Wingham Island, South-Central Alaska*

Professional Paper 1760-C: Jeanine M. Schmidt, Jonathan M.G. Glen, and Robert L. Morin, *The Longview/Lakeview Barite Deposits, Southern National Petroleum Reserve, Alaska (NPRA)—Potential-field Models and Preliminary Size Estimates*

Professional Paper 1760-D: James P. Dixon and John A. Power, *The January 2006 Volcanic-Tectonic Earthquake Swarm at Mount Martin, Alaska*

Professional Paper 1760-E: Edward G. Neal, *Channel Incision and Water-Table Decline Along a Recently Formed Proglacial Stream, Mendenhall Valley, Southeastern Alaska*

Professional Paper 1760-F: Dwight Bradley, Peter Haeussler, Paul O’Sullivan, Rich Friedman, Alison Till, Dan Bradley, and Jeff Trop, *Detrital Zircon Geochronology of Cretaceous and Paleogene Strata Across the South-Central Alaskan Convergent Margin*

Professional Paper 1760-G: Thomas A. Ager and Joseph G. Rosenbaum, *Late Glacial-Holocene Pollen-Based Vegetation History from Pass Lake, Prince of Wales Island, Southeastern Alaska*

For questions about the content of this report, contact Peter Haeussler

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U.S. Department of the Interior | U.S. Geological Survey	URL: http://pubs.usgs.gov/pp/1760/	Page Contact Information: Michael Diggles	Page Created: January 16, 2009	Page Last Modified: January 6, 2010 (mfd)

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