Matches in SemOpenAlex for { <https://semopenalex.org/work/W2097488079> ?p ?o ?g. }
Showing items 1 to 64 of
64
with 100 items per page.
- W2097488079 endingPage "600" @default.
- W2097488079 startingPage "585" @default.
- W2097488079 abstract "Talc deposits in the Ruby Range, southwestern Montana, have formed in Archean dolomitic marbles that were mineralized during retrograde talcification in the Proterozoic. Calcite-rich marbles contain the assemblage calcite-olivine-phlogopite + or - tremolite, indicating that metamorphism occurred in the upper amphibolite to granulite facies (M 1 ); crystallization of serpentine and chlorite, and dolomitization of the marbles in the greenschist facies overprinted the high-grade calc-silicate assemblages (M 2 ); and talc has replaced dolomite and the other greenschist-grade silicate minerals in the latest stage of recrystallization which resulted in the formation of the main talc bodies (M 3 ). Structural control of the talc formation is suggested by discontinuous occurrences of talc bodies along layer-parallel fractures. Preservation of relict textures indicates that the talc formed during constant volume replacement. Geochemical analyses and mass balance calculations demonstrate that introduction of large quantities of Si and Mg and removal of Ca is required to maintain constant volume. Model reactions indicate that infiltration of a minimum of 4.8 x 10 5 1 of water is needed to convert a cubic meter of the average high-grade marble to talc (volumetric water/rock ratio > 600). The infiltration mechanism is consistent with the observation that no isobaric univariant mineral assemblages were present to buffer the composition of the metamorphic fluids. Estimates of the maximum conditions of talc formation of 2 kbars and 400 degrees C are based on field observations and heterogeneous phase equilibria; it is probable that the talc actually formed at much lower temperatures and pressures, possibly in a near-surface hot spring deposit. Regional geologic relations indicate that the talc mineralization occurred during the middle Proterozoic." @default.
- W2097488079 created "2016-06-24" @default.
- W2097488079 creator A5004659322 @default.
- W2097488079 creator A5035168681 @default.
- W2097488079 creator A5082348392 @default.
- W2097488079 date "1990-05-01" @default.
- W2097488079 modified "2023-09-26" @default.
- W2097488079 title "Petrogenesis and timing of talc formation in the Ruby Range, southwestern Montana" @default.
- W2097488079 doi "https://doi.org/10.2113/gsecongeo.85.3.585" @default.
- W2097488079 hasPublicationYear "1990" @default.
- W2097488079 type Work @default.
- W2097488079 sameAs 2097488079 @default.
- W2097488079 citedByCount "24" @default.
- W2097488079 countsByYear W20974880792013 @default.
- W2097488079 countsByYear W20974880792014 @default.
- W2097488079 countsByYear W20974880792016 @default.
- W2097488079 countsByYear W20974880792017 @default.
- W2097488079 countsByYear W20974880792018 @default.
- W2097488079 countsByYear W20974880792019 @default.
- W2097488079 countsByYear W20974880792022 @default.
- W2097488079 countsByYear W20974880792023 @default.
- W2097488079 crossrefType "journal-article" @default.
- W2097488079 hasAuthorship W2097488079A5004659322 @default.
- W2097488079 hasAuthorship W2097488079A5035168681 @default.
- W2097488079 hasAuthorship W2097488079A5082348392 @default.
- W2097488079 hasConcept C127313418 @default.
- W2097488079 hasConcept C151730666 @default.
- W2097488079 hasConcept C159985019 @default.
- W2097488079 hasConcept C17409809 @default.
- W2097488079 hasConcept C192562407 @default.
- W2097488079 hasConcept C204323151 @default.
- W2097488079 hasConcept C2779979586 @default.
- W2097488079 hasConcept C44938399 @default.
- W2097488079 hasConcept C67236022 @default.
- W2097488079 hasConceptScore W2097488079C127313418 @default.
- W2097488079 hasConceptScore W2097488079C151730666 @default.
- W2097488079 hasConceptScore W2097488079C159985019 @default.
- W2097488079 hasConceptScore W2097488079C17409809 @default.
- W2097488079 hasConceptScore W2097488079C192562407 @default.
- W2097488079 hasConceptScore W2097488079C204323151 @default.
- W2097488079 hasConceptScore W2097488079C2779979586 @default.
- W2097488079 hasConceptScore W2097488079C44938399 @default.
- W2097488079 hasConceptScore W2097488079C67236022 @default.
- W2097488079 hasIssue "3" @default.
- W2097488079 hasLocation W20974880791 @default.
- W2097488079 hasOpenAccess W2097488079 @default.
- W2097488079 hasPrimaryLocation W20974880791 @default.
- W2097488079 hasRelatedWork W2350862504 @default.
- W2097488079 hasRelatedWork W2361911732 @default.
- W2097488079 hasRelatedWork W2389586391 @default.
- W2097488079 hasRelatedWork W2919497212 @default.
- W2097488079 hasRelatedWork W2951246468 @default.
- W2097488079 hasRelatedWork W2969614374 @default.
- W2097488079 hasRelatedWork W2975094203 @default.
- W2097488079 hasRelatedWork W3164890844 @default.
- W2097488079 hasRelatedWork W4385417089 @default.
- W2097488079 hasRelatedWork W3197450162 @default.
- W2097488079 hasVolume "85" @default.
- W2097488079 isParatext "false" @default.
- W2097488079 isRetracted "false" @default.
- W2097488079 magId "2097488079" @default.
- W2097488079 workType "article" @default.