Fluid flow in marbles at Jervois, central Australia: oxygen isotope disequilibrium and zoning produced by decoupling of mineralogical and isotopic resetting

Cartwright, Ian; Buick, Ian S.; Maas, Roland

doi:10.1007/s004100050313

Cited by 18 publications

(11 citation statements)

References 17 publications

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“…In high-grade metamorphic terranes, it is not uncommon to find fluid infiltration events during retrograde metamorphism (e.g. Buick & Cartwright 1996;Buick et al 1997;Cartwright et al 1997). In most cases, deep circulating surface fluids alter oxygen isotopic composition of marbles to a higher extent than those fluids derived from crystallizing magmas (Buick & Cartwright 2003).…”

Section: Carbon and Oxygen Isotope Geochemistrymentioning

confidence: 99%

Pre-metamorphic carbon, oxygen and strontium isotope signature of high-grade marbles from the Lützow-Holm Complex, East Antarctica: apparent age constraints of carbonate deposition

Satish-Kumar

Miyamoto

Hermann

et al. 2008

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C, O and Sr isotope geochemistry of high-grade marbles from the Lützow-Holm Complex, East Antarctica, has given clues on the depositional ages and post-depositional alterations. Dolomitic and calcitic marbles occur as thin layers with varying thickness (up to 100 m) in several outcrops in eastern Dronning Maud Land, most of which underwent postdepositional geochemical alterations. In particular, the Sr and O isotope alterations are extensive, with 87 Sr/ 86 Sr (550 Ma) ratios as high as 0.758 and d 18 O values as low as 25‰. These data suggest that multiple stages of fluid-rock interaction processes during diagenesis, prograde to peak and retrograde metamorphic events have altered the depositional isotopic signatures. However, some of the marble layers, exceptionally, preserve pre-metamorphic geochemical characteristics, such as low Sr isotope ratios, high d 18 O and d 13 C values, and well-equilibrated unaltered trace and rare earth element patterns. Lowest 87 Sr/ 86 Sr isotopic ratios of 0.7066 and 0.7053 with high d 13 C and d 18 O values suggest an apparent age of deposition around 730-830 Ma, although total geochemical resetting of carbonates by seawater of this age cannot be ruled out. The apparent depositional ages are consistent with carbonate deposition in the 'Mozambique Ocean' that separated East and West Gondwana.

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Section: Carbon and Oxygen Isotope Geochemistrymentioning

confidence: 99%

Pre-metamorphic carbon, oxygen and strontium isotope signature of high-grade marbles from the Lützow-Holm Complex, East Antarctica: apparent age constraints of carbonate deposition

Satish-Kumar

Miyamoto

Hermann

et al. 2008

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“…The informal term Jinka province is used to refer to a narrow (5–25 km wide) belt of HTLP amphibolite to granulite facies rocks and granites that extends from the Perenti Metamorphics in the west (Freeman, 1986), to the Bonya and Jervois region in the east (Freeman, 1986; Cartwright et al ., 1997), a total distance of >100 km (Fig. 1).…”

Section: Regional Geologymentioning

confidence: 99%

“…The Jinka province has received relatively little attention in previous geological investigations of the Arunta Inlier. Previous metamorphic studies are restricted to the Jervois/Bonya region, 80 km east of the Mopunga Range, where a metasedimentary sequence that was intruded by granites has undergone low‐pressure amphibolite facies metamorphism ( c. 2–3 kbar, 520–600 °C; Dobos, 1978; Cartwright et al ., 1997). The timing of granite intrusion in the Jinka province has been constrained by SHRIMP U–Pb zircon studies (Zhao & Bennett, 1995).…”

Section: Regional Geologymentioning

confidence: 99%

“…Two foliated granites, the Jervois and Dneiper Granites, have emplacement ages of 1771 ± 6 Ma, 1771 ± 15 Ma, respectively, whilst the post‐tectonic Mount Swan Granite has an age of 1713 ± 7 Ma. In the Jervois region, Cartwright et al . (1997) obtained Pb–Pb and Sm–Nd ages of 1750 ± 19 and 1720 ± 20 Ma, respectively, for garnets that grew during amphibolite facies metamorphism.…”

Section: Regional Geologymentioning

confidence: 99%

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Palaeoproterozoic high‐T, low‐P metamorphism and dehydration melting in metapelites from the Mopunga Range, Arunta Inlier, central Australia

Scrimgeour

Smith

Raith

2001

Journal Metamorphic Geology

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A sequence of psammitic and pelitic metasedimentary rocks from the Mopunga Range region of the Arunta Inlier, central Australia, preserves evidence for unusually low pressure (c. 3 kbar), regional‐scale, upper amphibolite and granulite facies metamorphism and partial melting. Upper amphibolite facies metapelites of the Cackleberry Metamorphics are characterised by cordierite‐andalusite‐K‐feldspar assemblages and cordierite‐bearing leucosomes with biotite‐andalusite selvages, reflecting P–T conditions of c. 3 kbar and c. 650–680 °C. Late development of a sillimanite fabric is interpreted to reflect either an anticlockwise P–T evolution, or a later independent higher‐P thermal event. Coexistence of andalusite with sillimanite in these rocks appears to reflect the sluggish kinematics of the Al2SiO5 polymorphic inversion. In the Deep Bore Metamorphics, 20 km to the east, dehydration melting reactions in granulite facies metapelites have produced migmatites with quartz‐absent sillimanite‐spinel‐cordierite melanosomes, whilst in semipelitic migmatites, discontinuous leucosomes enclose cordierite‐spinel intergrowths. Metapsammitic rocks are not migmatised, and contain garnet–orthopyroxene–cordierite–biotite–quartz assemblages. Reaction textures in the Deep Bore Metamorphics are consistent with a near‐isobaric heating‐cooling path, with peak metamorphism occurring at 2.6–4.0 kbar and c. 750–800 °C. SHRIMP U–Pb dating of metamorphic zircon rims in a cordierite‐orthopyroxene migmatite from the Deep Bore Metamorphics yielded an age of 1730 ± 7 Ma, whilst detrital zircon cores define a homogeneous population at 1805 ± 7 Ma. The 1730 Ma age is interpreted to reflect the timing of high‐T, low‐P metamorphism, synchronous with the regional Late Strangways Event, whereas the 1805 Ma age provides a maximum age of deposition for the sedimentary precursor. The Mopunga Range region forms part of a more extensive low‐pressure metamorphic terrane in which lateral temperature gradients are likely to have been induced by localised advection of heat by granitic and mafic intrusions. The near‐isobaric Palaeoproterozoic P–T–t evolution of the Mopunga Range region is consistent with a relatively transient thermal event, due to advective processes that occurred synchronous with the regional Late Strangways tectonothermal event.

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“…Discrete d 13 C and d 18 O compositions of marble and calcite samples are explained by various workers with different mechanisms which include (1) preferential separation of 18 O and 13 C (volatilization) during the decarbonatization reaction (Shieh and Taylor, 1969;Valley, 1986;Shin and Lee, 2003) and (2) mixing of oxygen and carbon from light isotope-rich external sources (fluid infiltration) Valley, 1986;Cartwright et al, 1997;Buick and Cartwright, 2000;Cartwright and Buick, 2000;Shin and Lee, 2003;Timon et al, 2006).…”

Section: Isotopic Depletion In the Calcic Marble And Skarnmentioning

confidence: 99%

Fluid infiltration effects on stable isotope systematics of the Susurluk skarn deposit, NW Turkey

Orhan

Mutlu

Fallick

2011

Journal of Asian Earth Sciences

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Fluid flow in marbles at Jervois, central Australia: oxygen isotope disequilibrium and zoning produced by decoupling of mineralogical and isotopic resetting

Cited by 18 publications

References 17 publications

Pre-metamorphic carbon, oxygen and strontium isotope signature of high-grade marbles from the Lützow-Holm Complex, East Antarctica: apparent age constraints of carbonate deposition

Pre-metamorphic carbon, oxygen and strontium isotope signature of high-grade marbles from the Lützow-Holm Complex, East Antarctica: apparent age constraints of carbonate deposition

Palaeoproterozoic high‐T, low‐P metamorphism and dehydration melting in metapelites from the Mopunga Range, Arunta Inlier, central Australia

Fluid infiltration effects on stable isotope systematics of the Susurluk skarn deposit, NW Turkey

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