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NARROW
GeoRef Subject
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all geography including DSDP/ODP Sites and Legs
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Africa
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Southern Africa
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South Africa (1)
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Asia
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Far East
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China
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Oceania
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Pasco Basin (1)
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United States
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California
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Colorado
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Jefferson County Colorado
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nitrogen
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oxygen
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sulfur
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upper Paleozoic
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Idaho Springs Formation (1)
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igneous rocks
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leucogranite (1)
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monzogranite (1)
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phosphates
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uranium minerals (1)
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Primary terms
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absolute age (3)
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Africa
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Asia
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Indian Peninsula
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India
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Australasia
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Australia (3)
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Canada
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carbon
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C-13/C-12 (1)
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Cenozoic
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Quaternary
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Pleistocene (2)
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upper Quaternary (1)
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Tertiary
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Neogene
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Miocene
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Columbia River Basalt Group (1)
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fluid inclusions (1)
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intrusions (2)
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Invertebrata
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radioactive isotopes
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stable isotopes
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C-13/C-12 (1)
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O-18/O-16 (3)
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S-34/S-32 (1)
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Sr-87/Sr-86 (1)
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magmas (1)
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Mesozoic
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Cretaceous
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Upper Cretaceous (2)
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metal ores
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lead ores (1)
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lead-zinc deposits (1)
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rare earth deposits (1)
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uranium ores (13)
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zinc ores (1)
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metals
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actinides
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uranium
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U-238/U-235 (1)
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alkaline earth metals
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strontium
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Sr-87/Sr-86 (1)
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rare earths
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gadolinium (1)
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technetium
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Tc-99 (1)
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metamorphic rocks
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metasomatism (6)
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mineral exploration (2)
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nitrogen
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N-15/N-14 (1)
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North America
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Appalachians (1)
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Great Basin (1)
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Rocky Mountains
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Laramie Mountains (1)
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Sangre de Cristo Mountains (1)
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Oceania
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Micronesia
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Mariana Islands
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Northern Mariana Islands
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Saipan (1)
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orogeny (1)
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oxygen
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O-18/O-16 (3)
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paleoclimatology (1)
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Paleozoic
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Devonian
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Meguma Group (1)
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upper Paleozoic
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paragenesis (2)
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petrology (1)
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plate tectonics (2)
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pollution (1)
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Precambrian
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Idaho Springs Formation (1)
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sea-level changes (1)
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clastic rocks
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sandstone (1)
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springs (1)
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sulfur
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tectonics (4)
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underground installations (1)
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United States
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California
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Inyo County California (1)
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Southern California (1)
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Colorado
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Colorado mineral belt (1)
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Jefferson County Colorado
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Schwartzwalder Mine (6)
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Columbia Plateau (1)
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Great Basin (1)
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Southwestern U.S. (1)
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U. S. Rocky Mountains
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Laramie Mountains (1)
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Sangre de Cristo Mountains (1)
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Washington
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Benton County Washington (1)
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Grant County Washington (1)
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Hanford Site (1)
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waste disposal (1)
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sedimentary rocks
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sedimentary rocks
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carbonate rocks
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limestone (1)
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chemically precipitated rocks
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evaporites (1)
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clastic rocks
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mudstone (1)
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sandstone (1)
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siltstone (1)
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Schwartzwalder uranium deposit
The Schwartzwalder uranium deposit; II, Age of uranium mineralization and lead isotope constraints on genesis
The Schwartzwalder uranium deposit; III, Alteration, vein mineralization, light stable isotopes, and genesis of the deposit
The Schwartzwalder uranium deposit; I, Geology and structural controls on mineralization
Genesis of the Schwartzwalder uranium deposit, Jefferson County, Colorado
An epigenetic model for the formation of the Schwartzwalder uranium deposit; discussion
An epigenetic model for the formation of the Schwartzwalder uranium deposit; reply
An epigenetic model for the formation of the Schwartzwalder uranium deposit
Developments in Uranium in 1984
Development in Uranium in 1983
Developments in Uranium in 1986
Developments in Uranium in 1985
Developments in Uranium in 1987
Paleohydrologic record of spring deposits in and around Pleistocene pluvial Lake Tecopa, southeastern California
Interesting Papers in Other Journals
Chloritization and its Bearing on Uranium Mineralization in Madyalabodu Area, Cuddapah District, Andhra Pradesh
Late Quaternary sea-level history of Saipan, Commonwealth of the Northern Mariana Islands, USA: A test of tectonic uplift and glacial isostatic adjustment models
The Rocky Mountain Front, southwestern USA
Gadolinium-dominant monazite and xenotime: Selective hydrothermal enrichment of middle REE during low-temperature alteration of uraninite, brannerite, and fluorapatite (the Zimná Voda REE-U-Au quartz vein, Western Carpathians, Slovakia)
Isotopic Studies of Contaminant Transport at the Hanford Site, Washington All rights reserved. No part of this periodical may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopying, recording, or any information storage and retrieval system, without permission in writing from the publisher.
Continental accretion, Colorado style: Proterozoic island arcs and backarcs of the Central Front Range
Abstract The Central Front Range of the Colorado Rockies is dominated by an early Proterozoic (ca. 1.8–1.7 Ga) metamorphosed volcanic and sedimentary sequence. In terms of plate tectonics, these rocks are interpreted as island arc, backarc, and sedimentary basin-fill units formed during the accretion of Colorado onto the North American craton. Despite good exposures, which we will be able to observe throughout the field trip, and their proximity to a large metropolitan area, these rocks are still not well understood. New research is under way to better understand accretionary processes in this region. The boundaries of the Central Front Range arc sequence are currently undefined. On the east and west, the sequence is terminated by Laramide-age faulting. The Pike’s Peak Batholith obscures the southern boundary, and the northern boundary is problematic. The main units present in the Central Front Range arc sequence are amphibolites, felsic gneisses, calc-silicate gneisses, mica schists and gneisses, iron formations, metagraywackes, quartzites, and metaconglomerates. These units as a whole are often called the “Idaho Springs Formation,” which is no longer considered a valid formation name. The degree of metamorphism is generally upper amphibolite grade, high temperature–low pressure. Anatectic conditions were reached in the felsic gneisses and mica schists over much of the area. This field trip examines these units in an area of slightly lower grade, where the character of the rocks is not masked by complications of anatectic melting.