Book contents
- Frontmatter
- Contents
- List of contributors
- Preface
- Acknowledgements
- 1 Geodynamic controls on glaciation in Earth history
- 2 Glacial-marine facies in a continental rift environment: Neoproterozoic rocks of the western United States Cordillera
- 3 The Neoproterozoic Konnarock Formation, southwestern Virginia, USA: glaciolacustrine facies in a continental rift
- 4 Glaciogenic deposits of the Permo-Carboniferous Dwyka Group in the eastern region of the Karoo Basin, South Africa
- 5 Itararé Group: Gondwanan Carboniferous-Permian of the Paraná Basin, Brazil
- 6 The interpretation of massive rain-out and debris-flow diamictites from the glacial marine environment
- 7 Neoproterozoic tillite and tilloid in the Aksu area, Tarim Basin, Uygur Xinjiang Autonomous Region, Northwest China
- 8 Lithology, sedimentology and genesis of the Zhengmuguan Formation of Ningxia, China
- 9 Architectural styles of glacially influenced marine deposits on tectonically active and passive margins
- 10 Marine to non-marine sequence architecture of an intracratonic glacially related basin. Late Proterozoic of the West African platform in western Mali
- 11 The enigmatic Late Proterozoic glacial climate: an Australian perspective
- 12 Isotopic signatures of carbonates associated with Sturtian (Neoproterozoic) glacial facies, central Flinders Ranges, South Australia
- 13 Reactive carbonate in glacial systems: a preliminary synthesis of its creation, dissolution and reincarnation
- 14 A Permian argillaceous syn- to post-glacial foreland sequence in the Karoo Basin, South Africa
- 15 A palaeoenvironmental study of black mudrock in the glacigenic Dwyka Group from the Boshof-Hertzogville region, northern part of the Karoo Basin, South Africa
- 16 Late Paleozoic post-glacial inland sea filled by fine-grained turbidites: Mackellar Formation, Central Transantarctic Mountains
- 17 Ice scouring structures in Late Paleozoic rhythmites, Paraná Basin, Brazil
- 18 Soft-sediment striated surfaces and massive diamicton facies produced by floating ice
- 19 Environmental evolution during the early phase of Late Proterozoic glaciation, Hunan, China
12 - Isotopic signatures of carbonates associated with Sturtian (Neoproterozoic) glacial facies, central Flinders Ranges, South Australia
Published online by Cambridge University Press: 06 July 2010
- Frontmatter
- Contents
- List of contributors
- Preface
- Acknowledgements
- 1 Geodynamic controls on glaciation in Earth history
- 2 Glacial-marine facies in a continental rift environment: Neoproterozoic rocks of the western United States Cordillera
- 3 The Neoproterozoic Konnarock Formation, southwestern Virginia, USA: glaciolacustrine facies in a continental rift
- 4 Glaciogenic deposits of the Permo-Carboniferous Dwyka Group in the eastern region of the Karoo Basin, South Africa
- 5 Itararé Group: Gondwanan Carboniferous-Permian of the Paraná Basin, Brazil
- 6 The interpretation of massive rain-out and debris-flow diamictites from the glacial marine environment
- 7 Neoproterozoic tillite and tilloid in the Aksu area, Tarim Basin, Uygur Xinjiang Autonomous Region, Northwest China
- 8 Lithology, sedimentology and genesis of the Zhengmuguan Formation of Ningxia, China
- 9 Architectural styles of glacially influenced marine deposits on tectonically active and passive margins
- 10 Marine to non-marine sequence architecture of an intracratonic glacially related basin. Late Proterozoic of the West African platform in western Mali
- 11 The enigmatic Late Proterozoic glacial climate: an Australian perspective
- 12 Isotopic signatures of carbonates associated with Sturtian (Neoproterozoic) glacial facies, central Flinders Ranges, South Australia
- 13 Reactive carbonate in glacial systems: a preliminary synthesis of its creation, dissolution and reincarnation
- 14 A Permian argillaceous syn- to post-glacial foreland sequence in the Karoo Basin, South Africa
- 15 A palaeoenvironmental study of black mudrock in the glacigenic Dwyka Group from the Boshof-Hertzogville region, northern part of the Karoo Basin, South Africa
- 16 Late Paleozoic post-glacial inland sea filled by fine-grained turbidites: Mackellar Formation, Central Transantarctic Mountains
- 17 Ice scouring structures in Late Paleozoic rhythmites, Paraná Basin, Brazil
- 18 Soft-sediment striated surfaces and massive diamicton facies produced by floating ice
- 19 Environmental evolution during the early phase of Late Proterozoic glaciation, Hunan, China
Summary
Abstract
The Appila Tillite in the southwest Flinders Ranges outcrops as a narrow, continuous unit, near the western edge of the Adelaide Geosyncline, resting disconformably on dolomitic Burra Group sediments. Interpretation of measured sections suggests the Appila Tillite represents two glacial advances, abruptly overlain by a post-glacial transgressive shale. These sections of the Tillite show condensed and commonly reworked sediments when compared with sections in the Northern Flinders Ranges, suggesting deposition close to the margin of the basin. Most clasts within this formation are of Burra Group origin with only a few erratics from the western Gawler Craton.
Dolomite is common in the Appila Tillite, either as dolostone clasts or as a diamictite matrix. Isotope analysis gives an average of – 6.26 permil δ18 O PDB and 1.34 permil δ13C PDB for the matrix, different to dolomitic clasts (0.28 δ18O and 4.39 δ13C). The dolomitic matrix is likely to be either detrital rock flour altered after deposition by isotopically light pore fluids, or a carbonate precursor that has undergone penecontemporaneous dolomitization. The former is favoured.
Geochemical results suggest the light δ13C values of the Appila matrix were caused by input of biologically derived carbon. The variation in isotope values between sampled material from different formations (Appila Tillite Fin., Tapley Hill Fm., and Burra Group) indicate that metamorphic equilibrium has not occurred.
Introduction
The Appila Tillite (defined by Mirams, in Thompson et al., 1964) in the Southern Flinders Ranges, is a local equivalent of extensive Sturtian glacial deposits found throughout the Adelaide Geosyncline (Preiss, 1987). Ten sections through this formation were measured along the Emeroo Range in the southwestern Flinders Ranges (Fig. 12.1).
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- Earth's Glacial Record , pp. 165 - 175Publisher: Cambridge University PressPrint publication year: 1994
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