TY - JOUR
T1 - Structural and hydrothermal alteration evidence for two gold mineralisation events at the New Celebration gold deposits in Western Australia
AU - Nichols, S.J.
AU - Hagemann, Steffen
PY - 2014
Y1 - 2014
N2 - The New Celebration gold deposits (∼2 Moz Au) are located within the Boulder segment of the first-order, transcrustal Boulder-Lefroy fault zone about 35 km southeast of Kalgoorlie, in the Kalgoorlie Terrane of the Eastern Goldfields Province, Western Australia. The gold deposits are hosted by ultramafic rocks (komatiite), differentiated gabbro/dolerite and variably thick (0.5 to 5 m, locally up to 80 m) felsic porphyry dykes that have intruded the ultramafic-mafic rock contact. Host rocks have undergone regional metamorphism to upper greenschist facies.At least four deformation events are recorded at New Celebration: (1) D1NC is represented by vertical stratigraphic contacts, the expression of regional scale upright folds. (2) D2NC deformation is expressed as a well-developed, NNW-trending, steeply WSW-dipping penetrative shear foliation (S2NC) and foliation-parallel, boudinaged quartz-carbonate veins (V2NC), which are representative of the regional D2 Boulder fault zone; movement on the fault is sinistral oblique slip. (3) D3NC deformation resulted in NNE-trending, WNW-dipping, short strike length (
AB - The New Celebration gold deposits (∼2 Moz Au) are located within the Boulder segment of the first-order, transcrustal Boulder-Lefroy fault zone about 35 km southeast of Kalgoorlie, in the Kalgoorlie Terrane of the Eastern Goldfields Province, Western Australia. The gold deposits are hosted by ultramafic rocks (komatiite), differentiated gabbro/dolerite and variably thick (0.5 to 5 m, locally up to 80 m) felsic porphyry dykes that have intruded the ultramafic-mafic rock contact. Host rocks have undergone regional metamorphism to upper greenschist facies.At least four deformation events are recorded at New Celebration: (1) D1NC is represented by vertical stratigraphic contacts, the expression of regional scale upright folds. (2) D2NC deformation is expressed as a well-developed, NNW-trending, steeply WSW-dipping penetrative shear foliation (S2NC) and foliation-parallel, boudinaged quartz-carbonate veins (V2NC), which are representative of the regional D2 Boulder fault zone; movement on the fault is sinistral oblique slip. (3) D3NC deformation resulted in NNE-trending, WNW-dipping, short strike length (
U2 - 10.1080/08120099.2014.879072
DO - 10.1080/08120099.2014.879072
M3 - Article
SN - 0812-0099
VL - 61
SP - 113
EP - 141
JO - Australian Journal of Earth Sciences
JF - Australian Journal of Earth Sciences
IS - 1
ER -