| Abstract: | Overview of the CD-ROM Contents:
The topic of this CD-ROM is the geologic framework of gold-silver vein deposits on Unga Island, in the Shumagin Islands, southwestern Alaska. The core of the publication is a new geologic map at a scale of 1:63,360 and aeromagnetic and electromagnetic survey data acquired by industry over the area of mineralization. Both the geologic map as well as a preliminary interpretation of the geophysical data--which are included by permission of the owner--are aimed towards deciphering the relations among volcanism, tectonism, and mineralization.
Data and discussions are organized in seven chapters, titles of which are outlined in the table of contents. The chapters consist of viewable text and figure images; postscript versions of the frontispiece figures and all chapter figures are included on the CD-ROM as well. The geologic map is a large viewable figure (Plate 1) that accompanies chapter 2. The map was constructed in ARC and its component coverages are provided in the folder ‘Geology‘ for users who may wish to modify the geologic data or add their own data. |
| Genre: | USGS Numbered Series |
| ProdID: | 21825 |
| Citation Author: | edited by Riehle, James R. |
| Citation Contributing Office: | Alaska Science Center |
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| Citation Edition: | Version 1.3 |
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| Citation Language: | ENGLISH |
| Citation Larger Work Title: | |
| Citation LatN: | 0553000 |
| Citation LatS: | 0550000 |
| Citation LonE: | -1593000 |
| Citation LonW: | -1610000 |
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| Citation Online Only Flag: | |
| Citation Phsyical Description: | 1 computer optical disc :ill., maps (some col.) ;4 3/4 in., in plastic box 13 x 15 x 1 cm. |
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| Citation Public Comments: | |
| Citation Publisher: | U.S. Geological Survey, |
| Citation Series: | Open-File Report |
| Citation Series Code: | OFR |
| Citation Series Number: | 99-136 |
| Citation Search Results Text: | A geological and geophysical study of the gold-silver vein system of Unga Island, Southwestern Alaska; 1999; OFR; 99-136; edited by Riehle, James R. |
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| Citation Year: | 1999 |
| Type: | citation/reference |
| Text: | A geological and geophysical study of the gold-silver vein system of Unga Island, Southwestern Alaska; 1999; OFR; 99-136; edited by Riehle, James R. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/usgs_thumb.jpg |
| URL (INDEX PAGE): | http://pubs.usgs.gov/of/1999/of99-136/ |
| Date Other: | Mon, 1 Nov 1999 00:00 -0600 |
| Publisher: | U.S. Geological Survey, |
