Silurian and Devonian systems

Banks, Maxwell R.; Gill, Edmund D.; Burns, K.L.

doi:10.1080/00167616208728524

Cited by 14 publications

(10 citation statements)

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“…It is considered to be of early Lochkovian age. Northeast Tasmania Mathinna Beds: The succession is still not established, and is mostly unfossiliferous or nearly so (Banks, 1962). A number of formations have been erected in restricted areas, including the Scamander Formation.…”

Section: Point Hibbs Region Point Hibbsmentioning

confidence: 98%

Correlation of the lower devonian rocks of australasia

Strusz

1972

Journal of the Geological Society of Australia

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Section: Point Hibbs Region Point Hibbsmentioning

confidence: 98%

Correlation of the lower devonian rocks of australasia

Strusz

1972

Journal of the Geological Society of Australia

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“…in press). East of the Tamar River, undifferentiated turbidites were originally referred to as the Mathinna beds (Banks 1962; Williams 1978; Baillie et al . 1989).…”

Section: Regional Geologymentioning

confidence: 99%

Formation of lode‐style gold mineralisation during Tabberabberan wrench faulting at Lefroy, eastern Tasmania

Reed

2002

Australian Journal of Earth Sciences

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The Lefroy Goldfield in eastern Tasmania is anomalous in southeastern Australia because mineralised fault reefs (i.e. reefs that are also faults) strike in an easterly direction at a high angle to the predominantly northwest strike of bedding and folds. Gold mineralisation is of Early to Middle Devonian age, with reef formation coinciding with a third regionally compressive deformation event (D 3 ), and a second phase of Tabberabberan orogenesis. Mineralised reefs are hosted by Mathinna Supergroup turbidites of Cambrian to Ordovician age and extend for up to 2 km across the boundary between the sandstone-dominated Stony Head Sandstone and the shale-dominated Turquoise Bluff Slate. Ore shoots in the reefs plunge moderately west and, in the Volunteer Mine, coincide with the intersection of the reef and a D 1 /D 2 thrust contact. The subvertical orientation and discordant relationship of the mineralised reefs to bedding, as well as the lack of gold mineralisation along bedding and pre-D 3 structures, indicate that the reefs formed during a period of wrench faulting. In contrast to lode-style deposits in Victoria, the far-field minimum compressive stress at Lefroy during reef formation was not vertical but, rather, occupied a subhorizontal orientation.

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“…*Postgraduate student, Department of Geography, University of Tasmania. (Banks 1962;Corbett et al 1974Corbett and Brown 1976;Crobett 1979). Karstic reduction has been a major factor in the evolution of the lowland valleys of this area but only in a few localities are landform assemblages characteristic of karst known to exist (Goede et al 1973;Kiernan 1979Kiernan , 1980b.…”

Section: Introductionmentioning

confidence: 99%

Relationship of cave fills to glaciation in the Nelson River Valley, Central Western Tasmania

Kiernan

1983

Australian Geographer

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Glacial diversion of the Nelson River into a limestone floored valley promoted karst development. This diversion occurred prior to the Last Glacial Stage. Outwash gravels of pre-Last Glacial age are preserved within a meander cutoff cave and indicate cavern infilling and only minimal cave enlargement during the cold climatic stage. Equivocal evidence exists for human occupation of one cave immediately prior to the late Last Glacial Maximum, when mechanically weathered limestone fragments were precipitated onto the cave floor. Extensive erosion of the cave fills has occurred during postglacial time.

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Silurian and Devonian systems

Cited by 14 publications

References 0 publications

Correlation of the lower devonian rocks of australasia

Correlation of the lower devonian rocks of australasia

Formation of lode‐style gold mineralisation during Tabberabberan wrench faulting at Lefroy, eastern Tasmania

Relationship of cave fills to glaciation in the Nelson River Valley, Central Western Tasmania

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