TY - JOUR
T1 - Geochemistry of Archean shoshonitic lamprophyres from the Yilgarn Block, Western Australia: An abundance and association with gold mineralization
AU - Taylor, W.R.
AU - Rock, N.M.S.
AU - Groves, David
AU - Perring, C.S.
AU - Golding, S.D.
PY - 1994
Y1 - 1994
N2 - Spatial and temporal associations between Archean mesothermal gold deposits, shoshonitic minor intrusions (e.g. lamprophyre dikes), and crustal-scale fault systems are well recognized features of some Archean terranes. It has been proposed that the association may be due to a combination of genetic factors, including intrinsic Au enrichment of shoshonitic magmas, and tectono-structural factors arising from crustal-scale orogenic activity in the Late Archean. To determine the nature of the association in the highly mineralized Archean Yilgarn Block, the major, trace and precious metal geochemistry of a suite of 49 lamprophyres and related microdiorite porphyries, covering a range of alteration states and proximities to gold mineralization, were investigated. The lamprophyres exhibit rock fabrics indicative of partial to extensive metamorphic recrystallization, range from primitive to more evolved compositions (MgO approximately 9 to
AB - Spatial and temporal associations between Archean mesothermal gold deposits, shoshonitic minor intrusions (e.g. lamprophyre dikes), and crustal-scale fault systems are well recognized features of some Archean terranes. It has been proposed that the association may be due to a combination of genetic factors, including intrinsic Au enrichment of shoshonitic magmas, and tectono-structural factors arising from crustal-scale orogenic activity in the Late Archean. To determine the nature of the association in the highly mineralized Archean Yilgarn Block, the major, trace and precious metal geochemistry of a suite of 49 lamprophyres and related microdiorite porphyries, covering a range of alteration states and proximities to gold mineralization, were investigated. The lamprophyres exhibit rock fabrics indicative of partial to extensive metamorphic recrystallization, range from primitive to more evolved compositions (MgO approximately 9 to
U2 - 10.1016/0883-2927(94)90007-8
DO - 10.1016/0883-2927(94)90007-8
M3 - Article
VL - 9
SP - 197
EP - 222
JO - Applied Geochemistry
JF - Applied Geochemistry
ER -