Structural features west of Mount Isa

Wilson, C. W.

doi:10.1080/00167617508728911

Cited by 12 publications

(6 citation statements)

References 16 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The last author recognized the chlorite, biotite, cordierite and sillimanite zones, and described the structure and stratigraphy in detail. This paper differs from Wilson (1972Wilson ( , 1975 in the details of the structural history and timing of metamorphism, and largely follows Blake (1987) regarding stratigraphic correlations. The rocks in the Hazeldene area belong to the Haslingden Group and the Mount Surprise Formation, which form part of cover sequence 2, and the Mount Isa Group of cover sequence 3.…”

Section: G E O L O G Y Of T H E H a Z E L D E N E Areamentioning

confidence: 96%

“…Former studies in the Hazeldene area include that of Mount Isa Mines Ltd (1973), Hill et al (1975 and Wilson (1972Wilson ( , 1975. The last author recognized the chlorite, biotite, cordierite and sillimanite zones, and described the structure and stratigraphy in detail.…”

Section: G E O L O G Y Of T H E H a Z E L D E N E Areamentioning

confidence: 99%

“…The Hazeldene area formed part of a structural study by Wilson (1970Wilson ( , 1972Wilson ( , 1975. Wilson (1970) recognized the three main regional folding events as being contemporaneous in all units, but later (Wilson, 1975) correlated F1 in units east of Fault 111 (referred to then as the Judenan Beds) with F2 in units to the west. The structural correlations of Wilson (1975) are not supported in this paper, nor by the work of Huang (1991), or Downing (1986, with whom the present author is largely in agreement.…”

Section: Deformation History Of the Hazeldene Areamentioning

confidence: 99%

“…The spatial relationships between the isograds and the Sybella Granite indicate that the heat for the regional metamorphism was supplied by the latter (Wilson, 1972(Wilson, , 1975Plumb et al, 1980). Conventional U-Pb determinations on zircons from the Sybella Granite yielded ages in the range 1671-1610Ma (Page & Bell, 1986).…”

Section: Timing Of the Sybella Granite And Mica Creek Pegmatitesmentioning

confidence: 99%

See 3 more Smart Citations

Proterozoic low‐pressure/high‐temperature metamorphism and an anticlockwise P–T–t path for the Hazeldene area, Mount Isa Inlier, Queensland, Australia

Rubenach

1992

Journal Metamorphic Geology

View full text Add to dashboard Cite

In the Hazeldene area, situated in the Mount Isa Inlier, Queensland, the metamorphic grade changes from chlorite zone, through biotite and cordierite zones, to sillimanite/K-feldspar zone.Microstructural studies of rocks near the sillimanite isograd demonstrate that cordierite grew early during the development of a steep foliation (S2), was replaced by biotite, andalusite and sillimanite at the metamorphic peak late in S2, and in turn by kyanite + chlorite adjacent to localized small post-D2 shear zones. Although the anticlockwise P-T-t path is well defined, the precise P-T conditions are uncertain because of problems with experimental and thermodynamic data. The best estimate for the metamorphic peak for rocks close to the sillimanite isograd is around 600" C at 4 kbar.The metamorphism has been dated at 1544 Ma, and was synchronous with a major crustal shortening event. Because proposed extensional events occurred more than 60 Ma earlier, their contribution to the peak metamorphic thermal perturbation would have been insignificant. The syn-metamorphic Mica Creek Pegmatites, the abundance of high heat-producing elements in the nearby pre-D2 Sybella Granite, and advective heat by fluids which caused considerable metasomatism in the Hazeldene area, may have each contributed to the thermal budget. However, the metamorphic thermal gradient may be 80" C km-' or higher, strongly suggesting a local magmatic control. As none are known in the area, such synmetamorphic plutons would have to lie beneath the exposed high-grade rocks.

show abstract

Section: G E O L O G Y Of T H E H a Z E L D E N E Areamentioning

confidence: 96%

Section: G E O L O G Y Of T H E H a Z E L D E N E Areamentioning

confidence: 99%

Section: Deformation History Of the Hazeldene Areamentioning

confidence: 99%

Section: Timing Of the Sybella Granite And Mica Creek Pegmatitesmentioning

confidence: 99%

See 2 more Smart Citations

Proterozoic low‐pressure/high‐temperature metamorphism and an anticlockwise P–T–t path for the Hazeldene area, Mount Isa Inlier, Queensland, Australia

Rubenach

1992

Journal Metamorphic Geology

View full text Add to dashboard Cite

show abstract

“…S 2 is the earliest foliation to affect all rocks in the study area. West of the Mt Isa Fault, an S 1 fabric is observed in older rocks (Wilson 1975) or preserved in porphyroblasts . Figure 7 summarises the structural relationships across the study area, and structural orientations are summarised in Figure 8.…”

Section: Structural Fabricsmentioning

confidence: 98%