Paleomagnetic evidence for periods of intense oxidative weathering, McKinnons mine, Cobar, New South Wales

M Smith; B Pillans; Kenneth McQueen

doi:10.1080/08120090802547033

Paleomagnetic evidence for periods of intense oxidative weathering, McKinnons mine, Cobar, New South Wales

M Smith, B Pillans, Kenneth McQueen

Research output: Contribution to journal › Article › peer-review

12 Citations (Scopus)

Abstract

The McKinnons gold mine, ~35 km southwest of Cobar in New South Wales is a non-operational opencut mine with extensive regolith profile development down to a depth of ~80 m. Twenty-three oriented paleomagnetic samples, from saprolite at different levels through the profile, yielded two welldefined paleomagnetic poles, one of Paleocene age (60+10 Ma), and the other of Miocene age (15+4 Ma). These reflect two periods of remagnetisation associated with deep, intense, oxidative weathering under humid conditions. They provide important time constraints for the history of climate change, weathering and landscape evolution of the Cobar region.

Original language	English
Pages (from-to)	201-212
Number of pages	12
Journal	Australian Journal of Earth Sciences
Volume	56
DOIs	https://doi.org/10.1080/08120090802547033
Publication status	Published - 2009
Externally published	Yes

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10.1080/08120090802547033

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title = "Paleomagnetic evidence for periods of intense oxidative weathering, McKinnons mine, Cobar, New South Wales",

abstract = "The McKinnons gold mine, ~35 km southwest of Cobar in New South Wales is a non-operational opencut mine with extensive regolith profile development down to a depth of ~80 m. Twenty-three oriented paleomagnetic samples, from saprolite at different levels through the profile, yielded two welldefined paleomagnetic poles, one of Paleocene age (60+10 Ma), and the other of Miocene age (15+4 Ma). These reflect two periods of remagnetisation associated with deep, intense, oxidative weathering under humid conditions. They provide important time constraints for the history of climate change, weathering and landscape evolution of the Cobar region.",

keywords = "Cobar, McKinnons mine, New South Wales, paleomagnetic poles, regolith, weathering.",

author = "M Smith and B Pillans and Kenneth McQueen",

year = "2009",

doi = "10.1080/08120090802547033",

language = "English",

volume = "56",

pages = "201--212",

journal = "Australian Journal of Earth Sciences",

issn = "0812-0099",

publisher = "Taylor & Francis",

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T1 - Paleomagnetic evidence for periods of intense oxidative weathering, McKinnons mine, Cobar, New South Wales

AU - Smith, M

AU - Pillans, B

AU - McQueen, Kenneth

PY - 2009

Y1 - 2009

N2 - The McKinnons gold mine, ~35 km southwest of Cobar in New South Wales is a non-operational opencut mine with extensive regolith profile development down to a depth of ~80 m. Twenty-three oriented paleomagnetic samples, from saprolite at different levels through the profile, yielded two welldefined paleomagnetic poles, one of Paleocene age (60+10 Ma), and the other of Miocene age (15+4 Ma). These reflect two periods of remagnetisation associated with deep, intense, oxidative weathering under humid conditions. They provide important time constraints for the history of climate change, weathering and landscape evolution of the Cobar region.

AB - The McKinnons gold mine, ~35 km southwest of Cobar in New South Wales is a non-operational opencut mine with extensive regolith profile development down to a depth of ~80 m. Twenty-three oriented paleomagnetic samples, from saprolite at different levels through the profile, yielded two welldefined paleomagnetic poles, one of Paleocene age (60+10 Ma), and the other of Miocene age (15+4 Ma). These reflect two periods of remagnetisation associated with deep, intense, oxidative weathering under humid conditions. They provide important time constraints for the history of climate change, weathering and landscape evolution of the Cobar region.

KW - Cobar

KW - McKinnons mine

KW - New South Wales

KW - paleomagnetic poles

KW - regolith

KW - weathering.

U2 - 10.1080/08120090802547033

DO - 10.1080/08120090802547033

M3 - Article

SN - 0812-0099

VL - 56

SP - 201

EP - 212

JO - Australian Journal of Earth Sciences

JF - Australian Journal of Earth Sciences

ER -

Paleomagnetic evidence for periods of intense oxidative weathering, McKinnons mine, Cobar, New South Wales

Abstract

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