TY - JOUR
T1 - GEOCHEMISTRY AND RELATIONSHIPS TO MINERALIZATION OF SOME IGNEOUS ROCKS FROM THE HARLECH DOME, WALES.
AU - Allen, P. M.
AU - Cooper, D. C.
AU - Fuge, R.
AU - Rea, W. J.
PY - 1976
Y1 - 1976
N2 - Forty-nine samples of intrusions, cutting both the Upper Cambrian and the Ordovician, together with 11 samples of Ordovician volcanic rocks from the eastern side of the Harlech Dome, were studied petrographically and analysed for major and trace elements (Cu, Pb, Zn, As, Mo, Ba, Zr). The rocks were divided petrographically into five groups and verified by discriminant analysis of the chemical data. The results show a pre-Arenig episode of sub-alkaline intermediate and basic igneous intrusion, which has much in common with activity associated with porphyry copper mineralization in island arc environments. There is some evidence of a genetic association between the intermediate intrusions and the copper mineralization at Coed-y Brenin.
AB - Forty-nine samples of intrusions, cutting both the Upper Cambrian and the Ordovician, together with 11 samples of Ordovician volcanic rocks from the eastern side of the Harlech Dome, were studied petrographically and analysed for major and trace elements (Cu, Pb, Zn, As, Mo, Ba, Zr). The rocks were divided petrographically into five groups and verified by discriminant analysis of the chemical data. The results show a pre-Arenig episode of sub-alkaline intermediate and basic igneous intrusion, which has much in common with activity associated with porphyry copper mineralization in island arc environments. There is some evidence of a genetic association between the intermediate intrusions and the copper mineralization at Coed-y Brenin.
UR - http://www.scopus.com/inward/record.url?scp=0016956168&partnerID=8YFLogxK
M3 - Article
AN - SCOPUS:0016956168
SN - 0371-7453
VL - 85
SP - b100-b108
JO - Transactions of the Institution of Mining and Metallurgy, Section B: Applied Earth Science
JF - Transactions of the Institution of Mining and Metallurgy, Section B: Applied Earth Science
ER -