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Structural Controls | | | | Structural setting is known to be of the utmost importance for the localization of commercial gold deposits in greenstone belts, and Pickle Crow is no exception. A complex polyphase deformation history that includes four tectono-metamorphic episodes with associated fracturing, faulting, shearing and folding and the generation of eight major anticlines and seven synclines, has been recognized on the Property. It is important to note that this complex folding is essentially confined to the Pickle Crow Mine area. Within this structural setting, the gold mineralization at Pickle Crow (both quartz vein and iron formation hosted) has been localized along or adjacent to shear zones developed oblique to greenstone belt lithological trends and crossing between adjacent lithologically concordant shear zones or faults. The general lithological strike on the Property is northeast and the dip is 75° to 80°NW. The plunge of folds in the iron formation is due north at 75° to 80°. The rake of productive veins in the No. 1 Shaft area is 70° in a direction N20°E. Several of the anticlines narrow and plunge beneath the younger rocks in a pattern that would be consistent with a plunge to the northeast. Some other anticlines maintain a constant width for considerable distances and some anticlines have a shape in plan which suggests a plunge to the southwest. The general trend of the fold axes is northeast but the Pickle Crow No. 2 syncline, the Pumphouse Creek anticline, and the Township Line syncline have fold axes which curve across the major fold axes. The folds strike northeast and dip steeply northwest forming isoclinal folds with overturned southeastern limbs. | | |
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