Womerina Pool
From:
https://archive.org/details/bulletingeologic2223geol/page/n123 The general reconnaissance of the Pilbara Goldfield, commenced in 1903, was completed at the close of the field season of 1905. On this occasion the portions of the district not previously visited were reached by way of Roebourne, and the Pilbara Goldfield entered by the crossing of the Yule River at Womerina Pool. Close by Womerina Pool is the site of a small alluvial gold rush some little time ago. The pool itself lies at the foot of a long serrated ridge, which forms a gigantic horseshoe of several miles in length, the southern arm of which returns to the Yule River near Minnaginienna Pool, some miles to the south of Womerina. At the latter place the banded quartz which constitute the horseshoe range is of considerable thickness and underlies at a very high angle to the south. At the scene of the alluvial rush near Womerina, the laminated quartz has been subjected to a con- siderable amount of disruption (Fig. 1). A well marked fault trending generally 156 degrees is seen traversing the banded quartz which forms high cliffs in the vicinity. A small creek, falling into the Yule River and draining the valley between two readily identifiable beds, has been the one which seems to have carried the bulk of the gold. Judging by the condi- tion and situation of the workings, the gold seems to have been concentrated in the vicinity of the fault which crosses the valley almost at right angles. The laminated quartz veins are associated with quartzites, slates and cleaved greenstones of the type common to other Pilbara centres. Up the valley between the arms of the horseshoe, the country rock is granite which forms part of that occupying such extensive areas in the district. Where the range is crossed by the track to the Wodgina Tmfield, the slates and other associated rocks give place to granite, which sends out veins and dykes into them. Considering the identity of the geological structure of this range with other portions of the district in which tin mining has been carried out, there seem good grounds for advising that atten- tion should be paid to prospecting the margin of the intrusive granite in this neighbourhood in the hope of finding tin also.