TY - JOUR
T1 - Synorogenic hydrothermal origin for giant Hamersley iron oxide ore bodies
AU - Powell, C.MCA.
AU - Oliver, N.H.S.
AU - Li, Zheng-Xiang
AU - Martin, D.MCB.
AU - Ronaszeki, J
PY - 1999
Y1 - 1999
N2 - Geologic mapping, basin analysis, and calculated fluid compositions indicate that giant orebodies of microplaty hematite, and possibly martite-goethite, in the Hamersley province of Western Australia, were formed by heated fluids driven by early Paleoproterozoic orogenesis, Detrital grains of microplaty hematite in the McGrath trough, a foreland basin in front of the northward-advancing Ophthalmian fold belt constrain the age of the earliest microplaty hematite ore formation to 200 degrees C and locally up to 400 degrees C were involved. Regional circulation of hydrothermal fluids, including heated surface water, through reduced banded iron formations occurred during or soon after the Ophthalmian orogeny. We speculate that martite-goethite orebodies, previously considered Mesozoic-Cenozoic, could also be related to heated Paleoproterozoic meteoric fluids migrating northward away from the Ophthalmian fold belt.
AB - Geologic mapping, basin analysis, and calculated fluid compositions indicate that giant orebodies of microplaty hematite, and possibly martite-goethite, in the Hamersley province of Western Australia, were formed by heated fluids driven by early Paleoproterozoic orogenesis, Detrital grains of microplaty hematite in the McGrath trough, a foreland basin in front of the northward-advancing Ophthalmian fold belt constrain the age of the earliest microplaty hematite ore formation to 200 degrees C and locally up to 400 degrees C were involved. Regional circulation of hydrothermal fluids, including heated surface water, through reduced banded iron formations occurred during or soon after the Ophthalmian orogeny. We speculate that martite-goethite orebodies, previously considered Mesozoic-Cenozoic, could also be related to heated Paleoproterozoic meteoric fluids migrating northward away from the Ophthalmian fold belt.
U2 - 10.1130/0091-7613(1999)027<0175:SHOFGH>2.3.CO;2
DO - 10.1130/0091-7613(1999)027<0175:SHOFGH>2.3.CO;2
M3 - Article
VL - 27
SP - 175
EP - 178
JO - Geology
JF - Geology
SN - 0091-7613
IS - 2
ER -