Metallization in the Caledonian Belt, Southern New Brunswick - A Geological and Geophysical Investigation
A. A. RUITENBERG; J. CHANDRA; G. RUITENBERG
The Caledonian Belt is mainly underlain by Late Precambrian and possibly Early Palaeozoic rocks, which are in part overlain by younger strata. Most of these rocks are weakly deformed, except for those in some linear . zones, which have been intensely deformed by cataclasis. Mineral deposits related to two distinct metallization episodes have been recognized. The earliest are zinccopper- lead sulphide deposits, which have been concentrated in the axial regions of late-stage cross-folds within the main cataclastic zone. The host rocks are andesitic and dacitic tuffs which show effects of intense talcose alteration, silicification and chloritization. Deposits related to the second episode are mainly composed of copper sulphides with locally abundant tennantite and tetrahedrite, which occur in brecciated and fractured carbonate-quartz veins. These veins postdate the late-stage cross-folds. VLF-EM and high-sensitivity magnetics proved to be very effective in delineating the geology of these deposits.
Keywords:
Alteration, andesitic, cataclastic, Precambrian Green Head Group, Saint John, New Brunswick, University of New Brunswick, Deposits, geology, New Brunswick, Resources, Rock, Rocks
