F55/B1-39 Contour interval: 5

F55/B1-13 Vertical scale: 100

No abstract available

Legacy product - no abstract available

Legacy product - no abstract available

35% coverage east F55/B1-41 Contour interval: 10

Wolframite is the commonest source of tungsten, but scheelite is present in some mines. Minerals of bismuth, copper, molybdenum, lead, tin, and iron have been identified in association with the tungsten minerals. Minor amounts of gold are also present. The Hatches Creek Wolfram Field is situated near the north-eastern end of the Davenport Range in the Northern Territory. The Stuart Highway, a bitumenized road linking the port of Darwin with Tennant Creek and Alice Springs, crosses the Range at the north-western end. Wolfram deposits are present at Wauchope, The Devil's Marbles, Moscluito Creek, Kurunelli, Epenarra, Elkedra, and Hatches Creek; only the Wauchope and Hatches Creek deposits have proved to be economically important. The Wauchope deposits have been investigated by Sullivan (1952). The Hatches Creek Wolfram Field is defined for the purpose of this report as a roughly triangular area bounded by Hatches Creek, Mia Mia Creek, and the Hit or Miss Gully (Pl. 2). The area extends roughly seven miles in a northerly direction and is about three miles across at the base. Only two small tungsten bearing reefs and some reefs reputed to carry gold lie outside this area.

The position of the area described here as the 'Headwaters of the Burke River in the tropical zone of Australia is evident from the locality map, Figure 1. Topographically it is part of the Selwyn Range, which is a divide composed mainly of metamorphosed Precambrian rocks. These are described by Carter (1959), Carter & Brooks (1960), and Carter, Brooks, & Walker (1961). Structurally it is part of the Burke River Outlier, within which the Selwyn Range is built of Cambrian sediments, which are referred to as 'the Selwyn Range sequence'. This sequence is preserved here owing to post. Cambrian faulting that involves the whole Outlier; the Outlier itself is the northern segment of the Burke River Structural Belt, which extends south for another hundred miles. The headwaters of the Burke River are in the Selwyn Range, north-western Queensland. Exploration began in 1860; Cambrian fossils were discovered in 1931. Mapping by the Commonwealth Bureau of Mineral Resources (1952-1958) amplified the knowledge of the geology and palaeontology of the area. Four formations (Roaring Siltstone, Devoncourt Limestone, Selwyn Range Limestone, and O'Hara Shale) and one unit of beds (Mount Birnie Beds) constitute the Cambrian of the Selwyn Range sequence. The Mount Birnie Beds (sandstone, arkose, regolithic clay) occurs as erosional residuals on the basement. Unconformably above follows the Roaring Siltstone with shale and sandstone interbeds; above it rests the Devoncourt Limestone, flaggy and bituminous; the next higher is the Selwyn Range Limestone, a caIcilutite with chert and marly interbeds, overlain by the O'Hara Shale with interbeds of chert and sandstone. A Mesozoic conglomerate (erosional residuals) and alluvial deposits conclude the sequence.The position of the area described here as the 'Headwaters of the Burke River in the tropical zone of Australia is evident from the locality map, Figure 1. Topographically it is part of the Selwyn Range, which is a divide composed mainly of metamorphosed Precambrian rocks. These are described by Carter (1959), Carter & Brooks (1960), and Carter, Brooks, & Walker (1961). Structurally it is part of the Burke River Outlier, within which the Selwyn Range is built of Cambrian sediments, which are referred to as 'the Selwyn Range sequence'. This sequence is preserved here owing to post. Cambrian faulting that involves the whole Outlier; the Outlier itself is the northern segment of the Burke River Structural Belt, which extends south for another hundred miles. The headwaters of the Burke River are in the Selwyn Range, north-western Queensland. Exploration began in 1860; Cambrian fossils were discovered in 1931. Mapping by the Commonwealth Bureau of Mineral Resources (1952-1958) amplified the knowledge of the geology and palaeontology of the area. Four formations (Roaring Siltstone, Devoncourt Limestone, Selwyn Range Limestone, and O'Hara Shale) and one unit of beds (Mount Birnie Beds) constitute the Cambrian of the Selwyn Range sequence. The Mount Birnie Beds (sandstone, arkose, regolithic clay) occurs as erosional residuals on the basement. Unconformably above follows the Roaring Siltstone with shale and sandstone interbeds; above it rests the Devoncourt Limestone, flaggy and bituminous; the next higher is the Selwyn Range Limestone, a caIcilutite with chert and marly interbeds, overlain by the O'Hara Shale with interbeds of chert and sandstone. A Mesozoic conglomerate (erosional residuals) and alluvial deposits conclude the sequence.

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