**README**

**Geographic Information Systems (GIS) Compilation of **\
**Geophysical, Geologic, and Tectonic Data for **\
**the Circum-North Pacific**

*By *

Mark L. Greninger\* and Simon L. Klemperer, (Department of Geophysics,
Stanford University, Stanford, California 94305-2215)

*and*

Warren J. Nokleberg (U.S. Geological Survey, Menlo Park, California
94025)

\*Now at: Anteon Corporation, PMD-10, 75 Hawthorne Street, San
Francisco, CA 94102

Warren J. Nokleberg *and* Michael F. Diggles, Editors

**With contributions from (listed alphabetically):**

Douglas S. Aitken (U.S. Geological Survey, Menlo Park, California, USA)

Brian S. Bennett (U.S. Geological Survey, Menlo Park, California, USA)

Keri L. Brennan (Chapleau, Ontario, Canada)

Ronald W. Buhmann (National Geophysical Data Center, NOAA,Boulder,\
Colorado, USA)

Stanislav G. Byalobzhesky (Russian Academy of Sciences, Magadan, Russia)

Steven P. Gordey (Geological Survey of Canada, Vancouver, Canada)

Roger A. Hansen (University of Alaska, Fairbanks)

Paul P. Hearn, Jr. (U.S. Geological Survey, Reston, Virginia, USA)

Thomas G. Hildenbrand (U.S. Geological Survey, Menlo Park, California,
USA)

Allen M. Hittelman (National Geophysical Data Center, NOAA, Boulder,
Colorado, USA)

J. Murray Journeay (Geological Survey of Canada, Vancouver, Canada)

Alexander I. Khanchuk (Russian Academy of Sciences, Vladivostok, Russia)

Boris Khlebnikov (Research Information Center (GlavNIC), Russian
Ministry of Natural Resources, Moscow, Russia)

D. Paul Mathieux (U.S. Geological Survey, Reston, Virginia, USA)

James W. H. Monger (Geological Survey of Canada, Vancouver, Canada)

Boris A. Natalin (Russian Academy of Sciences, Khabarovsk, Russia)

Leonid M. Parfenov (Russian Academy of Sciences, Yakutsk, Russia)

Richard W. Saltus (U.S. Geological Survey, Denver, Colorado, USA)

D.T. Sandwell (University of California San Diego, San Diego,
California, USA)

Thomas Simkin (Smithsonian Institution, Washington, DC 20560)

Gregory Ulmishek (U.S. Geological Survey, Reston, Virginia, USA)

Frederic H. Wilson (U.S. Geological Survey, Anchorage, Alaska, USA)

**Open-File Report 99-422**

**Version 1.0**

**1999**

**U.S. DEPARTMENT OF THE INTERIOR**

**Bruce Babbitt, Secretary**

**U.S. GEOLOGICAL SURVEY**

**Charles G. Groat, Director**

For sale by U.S. Geological Survey, Information Services, National
Mapping Division, Box 25046, Denver Federal Center, Denver, CO
80225-0046, Telephone: (888) ASK-USGS

ISBN 0-607-93623-1

**This publication was made using data made available by the following
organizations (listed alphabetically):**

Alaska Biological Science Center

Alaska Division of Oil and Gas

Defense Mapping Agency

Eros Data Center

European Space Agency

Exxon Production Research Company

Geological Society of America

Geological Survey of Canada

Geological Survey of Japan

International Seismological Centre

Japan Oceanographic Data Center

Lamont-Doherty Earth Observatory

Ministry of Geology, U.S.S.R.

National Aeronautics and Space Administration

National Earthquake Information Center

National Geophysical Data Center

National Ocean Service

National Oceanic and Atmospheric Administration

Naval Research Laboratory

Research Information Center (GlavNIC), Russian Ministry of Natural
Resources (RMNR)

Russian Academy of Sciences

Scripps Institution of Oceanography

Smithsonian Institution, Global Volcanism Program

Society of Exploration Geophysicists

Stanford University

United Nations Environment Programme/Global Resource Information
Database

U.S. Agency for International Development

United States Geological Survey

University of Alaska, Fairbanks

**DISCLAIMERS**

This report is preliminary and has not been reviewed for conformity with
U.S. Geological Survey (USGS) editorial standards or with the North
American Stratigraphic Code. Any use of trade, firm, or product names is
for descriptive purposes only and does not imply endorsement by the U.S.
Government.

This Compact Disc-Read Only Memory (CD-ROM) publication was prepared by
an agency of the United States Government. Neither the United States
Government nor any agency thereof, nor any of their employees, makes any
warranty, expressed or implied, or assumes any legal liability or
responsibility for the accuracy, completeness, or usefulness of any
information, apparatus, product, or process disclosed in this report, or
represents that its use would not infringe privately owned rights.
Reference therein to any specific commercial product, process, or
service by trade name, trademark, manufacturer, or otherwise does not
necessarily constitute or imply its endorsement, recommendation, or
favoring by the United States Government or any agency thereof.

Although all data and software published on this CD-ROM have been used
by the USGS, no warranty, expressed or implied, is made by the USGS as
to the accuracy of the data and related materials and (or) the
functioning of the software. The act of distribution shall not
constitute any such warranty, and no responsibility is assumed by the
USGS in the use of this data, software, or related materials.

**SYSTEM REQUIREMENTS**

The data and text on this CD-ROM require a computer and software able to
read ESRI (Environmental Systems Research Institute) data formats.
Appropriate software packages include ARC/INFO version 7.1.2 or higher,
ArcView 3.1 or higher, and ArcExplorer. Full system requirements for
each software package can be found at the Internet (Web) homepage for
ESRI, http://www.esri.com. In order to run ArcView 3.1, a Windows
computer is required with a Pentium processor with 24 Mb of RAM (32 Mb
recommended). A Pentium-II or higher processor with a speed of at least
at least 200 MHz is recommended for handling the large data files. All
systems require a color monitor that can display at least 256 colors.
This CD-ROM (OF99_422) was produced in accordance with the ISO 9660
Level 2 and Macintosh HFS standards. All ASCII text on this CD-ROM file
can be accessed from DOS, Windows, Macintosh, and Unix computers.

**USE OF GIS COMPILATION ON UNIX, MACINTOSH, AND DOS/WINDOWS COMPUTERS**

Depending on system configuration and user needs, the data can be viewed
directly from the CD-ROM, or the data can be downloaded onto a computer
hard drive for viewing, manipulation, and plotting.

**Unix**

To mount this CD-ROM on a Unix-based computer, become the root user,
then: *% su* - (not necessary for a Silicon Graphics workstation)

If a */cdrom* directory does not exist, create one:

*\# cd/*

*#mkdir cdrom*

Use the command appropriate to the UnixTM host:

DG AViiON: *mount -o noversion,ro -t cdrom /\<dev\> /cdrom*

DEC ALPHA: *mount -t cdfs -r -o nodefperm,noversion /\<dev\> /cdrom*

DECstation: *mount -t cdfs -r -o nodefperfm /\<dev\> /cdrom*

HP 700/8x7: *mount -rt cdfs /\<dev\> /cdrom* (or use *sam*)

IBM RS/6000: *mount -v \'cdrfs\' -p\' \' -r\' \' /\<dev\> /cdrom* (or
use *smit*)

Silicon Graphics: *mount -o setx -t iso9660 /dev/ssi/\<dev\> /cdrom*

Sun Solaris 1.x: *mount -rt hsfs /\<dev\> /cdrom*

Sun Solaris 2.3: use Volume Management software to mount and access the
CD-ROM.

Sun Workstations running the Common Desktop Environment will auto-mount
the CD-ROM.

**Macintosh**

ArcView 3.1 and ArcExplorer are not available for the Macintosh
computer. The document, Adobe Acrobat PDF files, and readme files can be
view, manipulated, and printed with a Macintosh computer. ArcView 3.0
for Macintosh can be used to create new ArcView project files.

**DOS/Windows**

To mount this CD-ROM on a DOS/Windows-based computer, insert the CD-ROM
into a drive, and open the CD-ROM window. Follow the below instructions
in the next section.

## OPENING THE DATASETS AND EXAMPLES OF GIS COMPILATION

In the directory /norpac*/setup*, two ArcView projects (*norpac1.apr*,
*norpac2.apr*) and one ArcExplorer project (*norpac.aep*) are provided
to give users easy access to data on the CD-ROM. *norpac1.apr* requires
that Spatial Analyst, an ArcView Extension which allows advanced
manipulation and analysis of raster or point data (such as aeromagnetic,
gravity, and earthquake data) compiled in ARC/INFO GRID format, be
installed as well as ArcView 3.1. Use of *norpac2.apr* is designed for
ArcView users who do not also have Spatial Analyst. Use of the
ArcExplorer 1.1 project, norpac.aep, requires installation of the
ArcExplorer program that is provided on the CD-ROM.

**Use of GIS Compilation with ArcView 3.1**

If ArcView 3.1 or higher is installed on your computer:

1\. Place the CD-ROM in the CD Drive. Open the CD-ROM window.

2\. Find the ArcView project *setup.apr* located in the */norpac/setup*
directory.

3\. Open the ArcView project by clicking on *setup.apr*, either from a
file manager or from within ArcView.

4\. ArcView should start with a small window with the title, "Cannot
find the NorPac Data" followed by the sentence, "Enter the location of
the NorPac Data". In the white box, replace "Drive Name" with the drive
name and directory, "N:/norpac/" where "N" is the letter or name of the
CD or hard drive. Next click "OK". A new window will appear with the
title, "Found Spatial Analyst!" followed by the sentence, "Select a
Project to load:" In the white box, select either "Norpac1.apr (Spatial
Analyst)", if your computer has both ArcView 3.1 and Spatial Analyst
installed, or select "Norpac2.apr (non-Spatial Analyst)", if your
computer has only ArcView 3.1 installed. The selected ArcView project
should load automatically. (Please note that if Spatial Analyst is not
installed, Norpac2.apr will automatically load.) A window will appear
with the title norpac1.apr or norpac2.apr, depending on the preceding
selection. In the white box on the left side of the window will be a
list of views that can be opened, viewed, manipulated, or printed within
ArcView. Each view is a digital map of part of the GIS compilation. Each
view has one or more themes (layers) that can be selected (made visible)
or deselected (made invisible).

The views are:

Active Earth Example

Magnetic-Lithologic Correlation Example

Topographic Example

Cultural Features

Geology - Alaska

Geology - Russia

Gravity - DGRAV

Gravity - Geosat

Gravity - Seasurface

Magnetics - Alaska

Magnetics - Arctic

Magnetics - DNAG

Magnetics - East Asia

Magnetics - Russia

Reflection Profile Tracklines

Seismicity

Terranes - Alaska

Terranes - Canadian Cordillera

Terrames - Circum-North Pacific

Topography - Raster

Topography - Vector

Volcanoes - Active

A more detailed description of the views in given in the below section
on Description of Views. Please note that if new themes and views are
added to either *norpac1.apr* or to *norpac2.apr* and the ArcView
project is saved, the ArcView project file needs to be edited before
subsequent use of *setup.a*pr. Using a text editor such as WordPad, the
path name *N:/*norpac/ (where N is the designator of the CD drive) in
either *norpac1.apr* or *norpac2.apr* (as appropriate) will need to be
replaced by *\$norpac/.*

**Use of GIS Compilation with ArcExplorer 1.1**

If ArcExplorer is installed on your computer:

1\. Place the CD-ROM in the CD Drive. Open the CD-ROM window.

2\. Find the ArcView project "*norpac.aep"* located in the
*/norpac/setup* directory.

3\. Copy the ArcExplorer project, "*norpac.aep"* into a directory on
your hard drive. Deselect the Read-only box for the properties of this
file. In order to accomplish this on a Windows computer, right-click on
the file name and select "Properties".

4\. Open the norpac.aep file in a word processor program, such as
WordPad. Substitute the text string, D:\\norpac\\ with N:\\norpac\\
where "N" is the letter or name of the CD drive. Save the file as a text
file with a new file name. Please note that a back slash ("\\") is used
in the substitution**.**

5\. Start the ArcExplorer project by clicking on the new file name. The
ArcExplorer project will start. In the gray box on the left side will be
a list of pre-selected themes that can be opened (by selecting), viewed,
and printed. Each theme is one part of the GIS compilation. Other themes
can be added from the GIS compilation by referring to the below data
descriptions. The themes consist of the basic ArcInfo files contained in
the GIS compilation. The theme names and their "translated" names are:

**THEME NAME "TRANSLATED NAME"**

**Circum-North Pacific Terrane and Overlap Assemblage Map**

BASINS.AAT Mesozoic and Cenozoic basins for Circum-North Pacific terrane
and overlap assemblage map

COAST.AAT Coastline for Circum-North Pacific terrane and overlap
assemblage map

FLTS_LND.AAT Onshore (land) faults for Circum-North Pacific terrane and
overlap assemblage map

FLTS_OCN.AAT Offshore faults for Circum-North Pacific terrane and
overlap assemblage map

FLTS_POS.AAT Post-accretionary faults, onshore and offshore, for
Circum-North Pacific terrane and overlap assemblage map

MAG_LINS.AAT Magnetic lineaments for Circum-North Pacific terrane and
overlap assemblage map

NOR_PAC.PAT Topography for Circum-North Pacific terrane and overlap
assemblage map

OCN_GEOL.AAT Oceanic geology for Circum-North Pacific terrane and
overlap assemblage map

RIVERS.AAT River drainages from Circum-North Pacific terrane and overlap
assemblage map.

TERR_LND.PAT1 Onshore terranes for Circum-North Pacific terrane and
overlap assemblage map

TERR_OCN.PAT Offshore terranes for Circum-North Pacific terrane and
overlap assemblage map

SEA_MNTS.PAT Seamounts for Circum-North Pacific terrane and overlap
assemblage map

**Geologic Map of Russian Far East**

RUS_FLTS.AAT Faults for geologic map of Russia

RUS_GEOL.PAT Geologic units of Russian Far East

RUS_GEOL.PATIMPAC Impactite areas for geologic map of Russia

**Terrane and Geologic Maps of Alaska and Canadian Cordillera**

AK_GEOL.PAT Geologic map of Alaska

ASSEMBLG.PAT Terrane and tectonic-assemblage maps of the

Canadian Cordillera

TERR_LND.PAT Detailed terrane map of Alaska at 1:2.5 M scale

**Gravity and Magnetic Maps**

AK_MAG (Image) Magnetic map of Alaska (mainly onshore)

ARCT_MAG (Image) Magnetic map of the Arctic (mainly offshore)

ASIA_MAG (Image) Magnetic map of Far East Asia

DGRAV (Image) Onshore Bouguer gravity anomalies and offshore free-air
gravity anomalies for Alaska and adjacent offshore area

DNAG_MAG (Image) Magnetic map of North America, onshore and offshore

GEOSAT (Image) Satellite-derived free-air gravity fir offshore areas
only.

RUSS_MAG (Image) Magnetic map of Russia

SEA_SURF (Image) Satellite-derived sea-surface heights

**Seismicity**

AK_SEIS.PAT Seismicity for Alaska, 1888 to 1998

ISC_CAT.PAT Global seismicity, 1964-1991

**Topography and Bathymetry**

AK_SHELF.PAT Bathymetry for US waters shallower than 200 m, Beaufort Sea
to the Aleutians

BER_CHUK.PAT Bathymetry for Chukchi Sea and Bering Straits, US and
Russian waters

CHUKCHI.PAT Bathymetry for Chukchi Sea

ETOPO5 (Image) *5'-sampled land topography and marine bathymetry.*

GTOPO2 (Image) *2'-sampled land topography and marine bathymetry (only
available to 70°N)*

GTOPO30 (Image) 30"-sampled topography (land only)

**Cultural Features**

BOUNDARY.PAT International boundaries for Circum-North Pacific

CITIES.PAT Major cities for Circum-North Pacific

FEATURES.PAT Cultural features for Circum-North Pacific

LATLONG5.AAT Latitude and longitude grid at 5 degree spacing for
Circum-North Pacific

LATLON12.PAT Latitude and longitude grid at 12° spacing for

Circum-North Pacific

**Tracklines**

EW94_09.PAT Ship trackline for geophysical cruise EW94-09

EW94_10.PAT Ship trackline for geophysical cruise EW94-10

Please note that for the geologic and terrane maps, unique colors can be
added to polygons (units) and lines (faults or contacts), and map unit
abbreviations can be displayed. Please refer to the ArcExplorer
documentation included on the CD.

**ARCEXPLORER**

ArcExplorer is a GIS-viewing freeware program created by and available
from Environmental Systems Research Institute, Inc. (ESRI). The
directory /norpac/setup/arcexplo contains installers for ArcExplorer 1.1
for Windows 95/98/NT. NT machines must have Service Pack 3 installed. In
addition to viewing GIS data in ARC/INFO, ArcView, and other digital
formats, ArcExplorer permits GIS data queries. ArcExplorer is currently
only available for Windows computers (95, 98, or NT 4.0). ArcExplorer
can access the GIS data contained in ARC/INFO 7.1.2 coverages on this
CD-ROM. But because ArcExplorer can not display gridded datasets, images
of these datasets are created as *\*\*\*.bil* files which are displayed
for the following datasets: (1) three raster topographic datasets
(*/norpac/data/topogrfy/raster /etopo5*, */gtopo2 *and */gtopo30);* (2)
three gravity datasets (*/norpac/data/gravity/dgrav*,* /geosat* and
*/sea-surf*); and (3) five magnetic datasets
(*/norpac/data/magnetic/ak_mag*, */arct_mag*, */asia_mag*, */dnag_mag*
and */russ_mag*).* *Please refer to the section below on "Contents and
Description of /norpac/data".

**PORTABLE DOCUMENT FORMAT (PDF) FILES**

This publication makes use of Adobe Acrobat PDF files that are viewed
with Adobe Acrobat Reader (versions 3.01 and 4.0 provided on this CD-ROM
in the /norpac/setup/Acrobat folder). To make best use of this CD-ROM,
you will need to develop some familiarity with Acrobat Reader; an
on-line guide is available within Acrobat Reader under \"Help.\" The
Acrobat directory contains installers for Adobe Acrobat Reader 3.01
(ACROBAT3 subdirectory) and 4.0 (ACROBAT4 subdirectory) for both 32-bit
Windows (PC directories) and Macintosh (MAC directories). Acrobat 3.01
will run on the minimum system requirements for this disc given above.
To use Acrobat Reader 4.0 under Windows, you need an 80486 or Pentium
processor-based personal computer, Microsoft Windows 95, Windows 98, or
Windows NT 4.0 with Service Pack 3 or later, 8 MB of RAM on Windows 95
and Windows 98 (16 MB recommended), or 16 MB of RAM on Windows NT (24 MB
recommended). To use Acrobat Reader 4.0 on a Macintosh, you need a Power
Macintosh computer. This CD-ROM contains a full-text index (index.pdx
and associated files in the \"index\" directory) that is for use in
searching the PDF files for words or sets of words, using the search
tool in Acrobat Reader. You can use the installers provided on this disc
or download the latest version of Adobe Acrobat Reader free via the
World Wide Web from the Adobe homepage at http://www.adobe.com/.

**DOCUMENTATION**

For more a detailed description of this CD-ROM, please refer to the
included document file that is contained in the directory
*/norpac/readme* in Word 6 and PDF formats.

**DIRECTORY ORGANIZATION**

The */norpac* directory on this CD-ROM contains four directories,
*/data*, */readme*, and */setup* plus an */index* directory used by
Acrobat Search. In all tables, directories, sub-directories and
filenames are listed alphabetically. Please note, however, that the
ArcView windows with the available views for the projects *norpac#.apr*
are listed alphabetically by "theme name", as listed in the contents of
*/norpac/data*.

The directory */norpac/data* contains the GIS data in ARC/INFO 7.1.2
coverage and GRID formats. The directories under */norpac/data* are
organized by data type in the following sub-directories: cultural;
geology; gravity; magnetic; seismicity; shiptrax; terranes; topogrfy;
and volcano. Each of these contains a sub-directory for each dataset
which in turn contains all necessary files for use of the data with ESRI
Arc software. All the vector datasets are presented as ARC/INFO
coverages accessible by ArcView, ARC/INFO, and ArcExplorer.* *Because
ARC/INFO GRID format files are not accessible by ArcExplorer, these
datasets are represented as \*\*\*.bil images which can be opened in
ArcExplorer. Sub-directories within geology and terranes also contain
explanatory texts and figures, in \*\*\*.txt, \*\*\*.doc and \*\*\*.pdf
formats, within sub-sub-directories called explanat. All data
directories serve as ARC/INFO work spaces and include an ARC/INFO files.

The directory */norpac/data* contains two additional sub-directories.
/norpac/data/examples contains example views of data compilations
created from this CD-ROM, and additional shape files for new coverages
created as part of these views. The directory */norpac/data/legends*
contains suggested color tables and legends for different data-sets. The
directories /examples and /legends are not ARC/INFO work-spaces and have
no ARC/INFO files.

The directory */norpac/readme* contains information files for this
CD-ROM in multiple file formats, text (\*\*\*.txt), Word (\*\*\*.doc),
Rich-Text Format (\*\*\*.rtf), and portable document format
(\*\*\*.pdf). (\*\*\*.pdf files can be read with Adobe Acrobat Reader
4.0, freeware contained in */norpac/setup/Acrobat*). The various files
named readme.\*\*\* (this file) contain brief information about this
CD-ROM. The various files named document.\*\*\* contain full
documentation for all data-sets on this CD-ROM. The directory
*/norpac/readme/cpyright* contains copyright notices associated with
multiple-generation data.

**CONTENTS AND DESCRIPTION OF /norpac/setup**

The directory */norpac/setup* contains project files for use with
ArcView, norpac1.apr (for users with Spatial Analyst installed),
norpac2.apr (for users without Spatial Analyst), and the ArcExplorer
file norpac.aep (for users without ArcView). The */norpac/setup*
directory also contains: (1) in the directory */norpac/setup /arcexplo*,
installation files for ArcExplorer 1.1, the free data-viewing software
for users of this CD-ROM who do not have either ArcView or ARC/INFO
software; and (2) in the directory */norpac/setup/Acrobat*, installers
for Adobe Acrobat Reader 3.01 and 4.0 for both Windows 95/98/NT and
Macintosh. The latest version of Adobe Acrobat Reader can also be
downloaded free via the Internet from the Adobe homepage on the World
Wide Web at http://www.adobe.com.

**CONTENTS AND DESCRIPTION OF /norpac/data**

**Listing of data-sets**

Directory filename Brief description of data, Key reference

cultural boundary International, provincial and state boundaries

cities Significant population centers

features Other socio-cultural features

latlong5 Latitude and longitude grid at 5° spacing

latlon12 Latitude and longitude grid at 12° spacing

references: Various (refer to detailed tabular description in
documentation)

examples Example views of multiple layers from this GIS compilation

geology ak_geol Geologic map of Alaska

reference: Beikman (1980)

rus_flts Fault map of Russia

rus_geol Geologic map of Russia

reference: Nalivkin (1994); GlavNIVC (1998).

gravity dgrav Onshore Bouguer and offshore free-air gravity anomalies

reference: Hittelman and others (1994)

geosat Satellite-derived free-air gravity, offshore areas only

reference: Smith and Sandwell (1997)

sea_surf Satellite-derived sea-surface heights

reference: Hittelman and others (1994)

legends color-bars and contour information for each data-set

magnetic ak_mag Magnetic map of Alaska (largely onshore)

reference: Saltus and Simmons (1997)

arct_mag Magnetic map of the Arctic (largely offshore)

reference: Verhoef and others (1996); Macnab and others (1995)

asia_mag Magnetic map of Far East Asia

reference: Geological Survey of Japan and CCOP (1996)

dnag_mag Magnetic map of North America, onshore and offshore

reference: Hittelman and others (1989)

russ_mag Magnetic map of Russia

reference: Racey and others (1996)

seismcty isc_cat Catalog of global seismicity, 1964-1991

reference: Whiteside and others (1996)

ak_seis Alaska State Seismicity, 1898-1998

reference: Hansen and others (1999)

shiptrax ew94_09 Ship trackline for geophysical cruise EW94-09

ew94_10 Ship trackline for geophysical cruise EW94-10

reference: Bering-Chukchi Working Group (1999)

terranes alaska explanat Map explanation

terr_lnd Detailed terrane map of Alaska only

reference: Nokleberg and others (1994b)

canada assemblg Tectonic assemblages of Canadian Cordillera

reference: Journeay and Williams (1995)

nor_pac nor_pac Circum-North Pacific Terrane Map

basins Outlines of Mesozoic and Cenozoic basins

coast Coastline

explanat assemb (text files for assemblage descriptions)

columns (stratigraphic columns)

terranes (text files for terrane descriptions)

mapexpln.pdf (map explanation)

flts_lnd Onshore faults

flts_ocn Offshore faults

flts_pos Post-accretionary faults

mag_lins Magnetic lineaments

ocn_geol Oceanic geology

sea_mnts Seamounts

terr_lnd Onshore terranes

terr_ocn Offshore terranes

reference: Nokleberg and others (1994a)

topogrfy raster Contains gridded topographic data

etopo5 5'-sampled land topography and marine bathymetry

reference Hittelman and others (1994); NOAA (1988)

gtopo2 2'-sampled land topography and marine bathymetry

reference Smith and Sandwell (1997)

gtopo30 30"-sampled topography (land only)

reference: U.S. Geological Survey (1997)

hillshad 30"-sampled topography

reference GTOPO30: U.S. Geological Survey (1997)

etopo2 2'-sampled topography/bathymetry (to 70°N)

reference: Smith and Sandwell (1997)

etopo5 5'-sampled topography/bathymetry

reference: Hittelman and others (1994); NOAA (1988)

vector Contains contours (elevation or bathymetry)

ak_shelf Bathymetry for US waters shallower than 200m

ber_chuk Bathymetry for Bering and Chukchi Seas

chukchi Bathymetry for Chukchi Sea/Bering Straits

reference: Alaska Biological Science Center (1998)

nor_pac Circum-North Pacific topography and bathymetry

reference Moore (1990)

shorline World Vector Shoreline

reference: Soluri and Woodson (1990)

nor_pac Circum-North Pacific topography/bathymetry

rivers Major drainages, circum-North Pacific

reference: Moore (1990)

volcano volcano Historically active volcanoes

reference: Simkin and others (1994)

**ASSOCIATED STUDIES**

This GIS compilation on this CD-ROM is part of a project on the major
mineral deposits, metallogenesis, and tectonics of the Russian Far East,
Alaska, and the Canadian Cordillera. The project provides critical
information for collaborators and customers on bedrock geology and
geophysics, tectonics, major metalliferous mineral resources,
metallogenic patterns, and crustal origin and evolution of mineralizing
systems for the Russian Far East, Alaska, and the Canadian Cordillera.

The major scientific goals and benefits of the project are to: (1)
provide a comprehensive international data base on the mineral resources
of the region that is the first, extensive knowledge available in
English; (2) provide major new interpretations of the origin and crustal
evolution of mineralizing systems and their host rocks, thereby enabling
enhanced, broad-scale tectonic reconstructions and interpretations; and
(3) promote trade and scientific and technical exchanges between North
America and Eastern Asia. Products from the project are providing sound
scientific data and interpretations for commercial firms, governmental
agencies, universities, and individuals that are developing new ventures
and studies in the project area, and for land-use planning studies that
deal with mineral resource issues. The Russian Far East part of the
project (as well as Alaska and the Canadian Cordillera) has vast
potential for known and undiscovered mineral deposits.

Published major companion studies for the project are: (1) a report on
the metallogenesis of mainland Alaska and the Russian Northeast
(Nokleberg and others, 1993); (2) a tectono-stratigraphic terrane map of
the Circum-North Pacific at 1:5 million scale with a detailed
explanation of map units and stratigraphic columns (Nokleberg and
others, 1994b); (3) a tectono-stratigraphic terrane map of Alaska at
1:2.5 million scale (Nokleberg and others, 1994a); (4) a summary terrane
map of the Circum-North Pacific at 1:10 million scale (Nokleberg and
others, 1997a); (5) detailed tables of mineral deposits and placer
districts for the Russian Far East, Alaska, and the Canadian Cordillera
in paper format (Nokleberg and others, 1996) and in CD-ROM format
(Nokleberg and others, 1997b); (6) a GIS presentation of a summary
terrane map, mineral deposit maps, and metallogenic belt maps of the
Russian Far East, Alaska, and the Canadian Cordillera (Nokleberg and
others, 1998b); and (7) a study of the Phanerozoic tectonic evolution of
the Circum-North Pacific (Nokleberg and others, 1998a).

**ACKNOWLEDGMENTS**

We thank the many organizations which contributed data, directly or
indirectly, to this compilation. We particularly thank the contributors
for their providing data, assistance in compiling, and reviewing of the
GIS compilation. We thank V.J.S. Grauch (U.S. Geological Survey, Denver,
Colorado, USA) for assistance in obtaining the aeromagnetic data set of
the former Soviet Union from the National Geophysical Data Center.
Compilation of the digital data sets was obtained from "Research
Experience for Undergraduate" funds of the National Science Foundation
(award EAR-93-17087 from the Continental Dynamics program). We thank
Jeffrey C. Wynn and Frances R. Mills for their constructive scientific
reviews.

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