Chapter 14. AUREOLE SYSTEMATICS

Barton, Mark D.; Staude, J. M.; Snow, E.A.; Johnson, D.A.

doi:10.1515/9781501509612-017

Cited by 25 publications

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“…2 and Tables 2 & 3. Within approximately 2 km of the granites, the d18O values of from the isotopic fractionations of Chacko et al (1996).…”

Section: >380°c By the Absence Of Pyrophyllite (Evansmentioning

confidence: 99%

“…Airy Orthogneiss and its country rock were obtained gression at low temperatures to form prehnite, chlorite and ferrogedrite, and in some samples collected in or using the calibration of Chacko et al (1996). Chacko et al (1996) concluded that such differences arose adjacent to shear zones. This probably relates to the incursion of meteoric fluids during the 400-300 Ma from the use of isotopically disturbed systems in the Bottinga & Javoy (1975) empirical calibrations.…”

Section: >380°c By the Absence Of Pyrophyllite (Evansmentioning

confidence: 99%

“…Alice Springs orogeny as discussed by Cartwright & Buick (1998). Chacko et al (1996) suggested that the quartz-biotite oxygen isotope thermometer is very susceptible to The D18O Qtz-Bt values of 4.7‰ for the Harverson Granite and 4.6‰ for an adjacent metapelitic rock retrograde re-equilibration, and this is evident in the D18O Qtz-Bt temperature estimate of 269°C based on collected at a distance of c. 0.7 km from the contact give temperatures of 558 and 566°C, respectively, their calibration, for a sample that contains retrograde prehnite, chlorite and ferroactinolite. They also using the calibration of Clayton & Kieffer (1991) and 564 and 572°C using the empirical calibration of suggested that continued feldspar-mica exchange below the closure temperature of quartz would result Bottinga & Javoy (1975).…”

Section: >380°c By the Absence Of Pyrophyllite (Evansmentioning

confidence: 99%

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Stable isotopic evidence for fluid infiltration during contact metamorphism in a multiply‐metamorphosed terrane: the Reynolds Range, Arunta Block, central Australia

Vry¹,

Cartwright²

1998

Journal Metamorphic Geology

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The Lander Rock Beds form the local basement of the Reynolds Range in the Arunta Inlier of central Australia. These dominantly quartzose and pelitic lithologies underwent low-grade (c. 400°C) regional metamorphism prior to contact metamorphism (c. 2.5 kbar) around S-type megacrystic granitoids at 1820-1800 Ma. The Lander Rock Beds are overlain by metasediments of the Reynolds Range Group, which were subsequently intruded by granitoids at c. 1780 Ma. Regional metamorphism at 1590-1580 Ma produced grades varying from greenschist (400°C at 4-5 kbar) to granulite (750-800°C at 4-5 kbar) from north-west to south-east along the length of the Reynolds Range. Oxygen isotope ratios of the Lander Rock Beds were reset from 13.4±0.8‰ to as low as 6.7‰ adjacent to the contacts of the larger plutons, and to 10.3±1.1‰ around the smaller plutons. Biotite in all the major rock types found in the aureoles has dD values between −52 and −69‰, probably reflecting resetting by a cooling igneous+metamorphic fluid near the plutons. Sapphirine-bearing and other Mg-and Al-rich rock types have low d18O values (4.0±0.7‰). The precursors to these rocks were probably low-temperature (c. 200°C) diagenetic-hydrothermal deposits of Mg-rich chlorite, analogous to those in Proterozoic stratiform precious metal and uranium deposits that form by the infiltration of basin brines or seawater. As in the overlying Reynolds Range Group, regional metamorphism involved little fluid-rock interaction and isotopic resetting.

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“…2 and Tables 2 & 3. Within approximately 2 km of the granites, the d18O values of from the isotopic fractionations of Chacko et al (1996).…”

Section: >380°c By the Absence Of Pyrophyllite (Evansmentioning

confidence: 99%

Section: >380°c By the Absence Of Pyrophyllite (Evansmentioning

confidence: 99%

Section: >380°c By the Absence Of Pyrophyllite (Evansmentioning

confidence: 99%

See 1 more Smart Citation

Stable isotopic evidence for fluid infiltration during contact metamorphism in a multiply‐metamorphosed terrane: the Reynolds Range, Arunta Block, central Australia

Vry¹,

Cartwright²

1998

Journal Metamorphic Geology

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“…Macurda, D. B. Moreover, mass transport or metasomatic effects of fluid flow observed in contact metamorphic environments are numerous and sometimes of great economic importance (see review by Barton et al, 1991). The fluids may be derived from the cooling magma (magmatic fluids), from near-surface environments (meteoric or sea water) or from metamorphic devolatilization reactions (metamorphic fluids).…”

Section: Compaction-related Fault Systems: How Common Are They?mentioning

confidence: 99%

“…In fact low salinity water only becomes miscible with carbon dioxide at temperatures near the onset of the greenschist facies, and dissolved salts can potentially extend the miscibility gap between water and non-polar gases to the highest metamorphic temperatures (Bowers and Helgeson, 1983;Skippen and Trommsdorff, 1986;Johnson, 1991;Schmulovich, Tkachenko and Plyasunova, 1994). In fact low salinity water only becomes miscible with carbon dioxide at temperatures near the onset of the greenschist facies, and dissolved salts can potentially extend the miscibility gap between water and non-polar gases to the highest metamorphic temperatures (Bowers and Helgeson, 1983;Skippen and Trommsdorff, 1986;Johnson, 1991;Schmulovich, Tkachenko and Plyasunova, 1994).…”

Section: Solvent Species and Immiscibility In Metamorphismmentioning

confidence: 99%

Fluid Flow and Transport in Rocks

Jamtveit¹,

Yardley²

1996

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New insights into lithology and hydrogeology of the northern Newark Rift Basin

Zakharova

Goldberg

Olsen

et al. 2016

Geochem Geophys Geosyst

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The marginal facies of the Triassic rift basins in the eastern United States are poorly documented, particularly on the hinge or hanging wall margins. This study presents a lithological description and multiscale petrophysical analysis of basement rocks, overlying marginal facies of the early synrift strata, and the basal contact of the Palisade Sill that were drilled and cored in the northeastern part of the Newark Basin, near its terminus. The expression of the Stockton Formation differs from that in the central basin in having thinner layers, with uncertain temporal relationship to the type area. The bottom 50 m is lithologically distinct with brick‐red to dark‐purple mudstones and sandstones, abundant gypsum‐filled fractures, and a thin zone with anomalously high uranium concentration, not associated with organic‐rich mudstones as other occurrences in the basin. The crystalline basement is apparently Fordham gneiss, overlain by a thin sandstone layer and a dark‐purple hydrophilic mudstone. Despite the abundance of coarse‐grained strata and multiple sets of tectonic fractures, hydraulically transmissive zones are sparse, and do not uniquely correlate to fracture and/or matrix characteristics. Enhanced transmissivity may exist along intrusion boundaries due to enhanced thermal fracturing, but more hydraulic data are needed to verify it. Comparison of petrophysical data in two boreholes ∼210 m apart shows no direct correlation of individual lithological units and their hydraulic properties, although the overall formation characteristics are similar. The results highlight challenges for outcrop correlation at the marginal edges of the rift basins and estimating reservoir properties of these heterogeneous formations.

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Chapter 14. AUREOLE SYSTEMATICS

Cited by 25 publications

References 0 publications

Stable isotopic evidence for fluid infiltration during contact metamorphism in a multiply‐metamorphosed terrane: the Reynolds Range, Arunta Block, central Australia

Stable isotopic evidence for fluid infiltration during contact metamorphism in a multiply‐metamorphosed terrane: the Reynolds Range, Arunta Block, central Australia

Fluid Flow and Transport in Rocks

New insights into lithology and hydrogeology of the northern Newark Rift Basin

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