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NARROW
GeoRef Subject
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all geography including DSDP/ODP Sites and Legs
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Asia
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Far East
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Japan
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Honshu
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Tokyo Japan (1)
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United States
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Idaho
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Butte County Idaho (1)
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Idaho National Laboratory (1)
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Oregon
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Grant County Oregon (1)
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Washington
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Asotin County Washington (1)
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Grant County Washington (1)
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elements, isotopes
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isotopes
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Cs-137 (1)
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Sr-90 (1)
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metals
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alkali metals
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cesium
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Cs-137 (1)
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lithium (1)
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sodium (1)
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alkaline earth metals
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calcium (1)
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magnesium (2)
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strontium
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Sr-90 (1)
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iron (3)
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geologic age
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Cenozoic
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Tertiary
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Neogene
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Miocene
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Columbia River Basalt Group (5)
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Grande Ronde Basalt (2)
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igneous rocks
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igneous rocks
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volcanic rocks
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basalts
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flood basalts (2)
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glasses (1)
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minerals
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ferrihydrite (1)
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hematite (1)
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iron oxides (1)
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silicates
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chain silicates
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pyroxene group
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clinopyroxene
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augite (1)
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sheet silicates
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clay minerals
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allophane (3)
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imogolite (3)
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kaolinite (1)
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nontronite (3)
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smectite (4)
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mica group
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celadonite (1)
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Primary terms
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Asia
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Far East
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Japan
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Honshu
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Tokyo Japan (1)
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-
-
-
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Cenozoic
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Tertiary
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Neogene
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Miocene
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Columbia River Basalt Group (5)
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Grande Ronde Basalt (2)
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-
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clay mineralogy (2)
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crystal growth (1)
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geochemistry (5)
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geochronology (1)
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igneous rocks
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volcanic rocks
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basalts
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flood basalts (2)
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glasses (1)
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-
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isotopes
-
radioactive isotopes
-
Cs-137 (1)
-
Sr-90 (1)
-
-
-
metals
-
alkali metals
-
cesium
-
Cs-137 (1)
-
-
lithium (1)
-
sodium (1)
-
-
alkaline earth metals
-
calcium (1)
-
magnesium (2)
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strontium
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Sr-90 (1)
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-
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iron (3)
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metasomatism (1)
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pollution (1)
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sea water (1)
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sediments
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clastic sediments
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clay (1)
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soils (2)
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spectroscopy (1)
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United States
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Idaho
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Butte County Idaho (1)
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Idaho National Laboratory (1)
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Oregon
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Grant County Oregon (1)
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Washington
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Asotin County Washington (1)
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Grant County Washington (1)
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weathering (4)
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sediments
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sediments
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clastic sediments
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clay (1)
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soils
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paleosols (1)
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soils (2)
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Spectroscopic analysis of allophane and imogolite samples with variable Fe abundance for characterizing the poorly crystalline components on Mars
Alteration, mass analysis, and magmatic compositions of the Sentinel Bluffs Member, Columbia River flood basalt province: COMMENT
Geochemistry and mineralogy of a saprolite developed on Columbia River Basalt: Secondary clay formation, element leaching, and mass balance during weathering
Formation of the ferruginous smectite SWa-1 by alteration of soil clays
TEMPERATURE EFFECTS ON THE CRYSTALLINITY OF SYNTHETIC NONTRONITE AND IMPLICATIONS FOR NONTRONITE FORMATION IN COLUMBIA RIVER BASALTS
XAFS STUDY OF Fe-SUBSTITUTED ALLOPHANE AND IMOGOLITE
Spectral and hydration properties of allophane and imogolite
Celadonite in continental flood basalts of the Columbia River Basalt Group
XAS STUDY OF Fe MINERALOGY IN A CHRONOSEQUENCE OF SOIL CLAYS FORMED IN BASALTIC CINDERS
Cation Exchange on Vadose Zone Research Park Subsurface Sediment, Idaho National Laboratory 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.
Crystallisation of anhydrite-bearing magmas
Anhydrite has been identified as a phenocrystic phase in some silicic volcanic magmas, but it is not commonly described in plutonic rocks. Anhydrite-bearing magmas tend to form in arc environments and to contain hydrous, low-temperature, oxidised mineral assemblages. Phenocrystic anhydrite coexists with sulphur-enriched apatite and sometimes with pyrrhotite, in silicate melt that contains from 50 ppm to 1 wt% S, depending on temperature and f O 2 conditions. Vapour coexisting with anhydrite- and water-saturated magma may contain from a few tenths of a mole per cent to a few mole per cent sulphur gases (SO 2 and H 2 S), with the exact composition and gas speciation depending on temperature and oxygen fugacity. Samples of one anhydrite-bearing magma, the 1991 Pinatubo dacite, have been experimentally crystallised to determine whether the magma retains its characteristic sulphur-rich mineral phases during solidification. Results show that anhydrite and sulphur-rich apatite are retained throughout crystallisation and vapour phase evolution. This suggests that anhydrite-bearing intrusive equivalents of the Pinatubo dacite should be present in arc plutonic complexes.