476 Reviews — Geological Siwcey of Western Australia. 



Department, including field and laboratory work, geological and 

 mineralogical collections, and publications. These are followed by 

 a detailed account of the principal results of the year's field 

 operations under the heading of " Mineral Resources." 



A detailed examination of some of the mining centres in the 

 Filbara Goldfields was made by Mr. Talbot, and the newly-opened 

 •tin-field of Wodgina (of which a sketch-map is given in the Report) 

 was also investigated. 



The Mount Margaret Goldfield was examined and reported upon 

 by Mr. C. G. Gibson, who found that the auriferous reefs and lodes 

 •occur in ' greenstones,' basic rocks which are essentially horn- 

 blendic, and exist both in the massive and schistose state ; being 

 similar to those usually forming the auriferous series of the Eastern 

 Goldfields. The " New Find " district, visited by Mr. Gibson, gave 

 vei'y little promise of successful results. 



Mr. H. P. Woodward reported upon a portion of the Broad Arrow 

 Goldfield, giving statistics relating to the shafts sunk to reach the 

 reefs at difi'erent levels, and particulars of the yield of gold to the 

 ton of ore. 



Mr. Woodward also visited the Wagin district for the purpose of 

 reporting upon the possibilities of coal occurring, and upon the 

 reputed phosphatic deposits. From this report, which is given in 

 extenso, it appears that the occurrence of coal deposits is somewhat 

 problematical, and that the alleged phosphatic deposits do not 

 contain sufiicient quantities to be worked for fertilising purposes. 



A very favourable report is given upon the " Sunbeam Lease " 

 gold-mining property, in which the yield has been of the most 

 encouraging character. 



The Northern district was visited by Mr. Woodward for the 

 pui'pose of examining and reporting upon certain gold discoveries. 

 His work' was confined to the examination and sampling of those 

 localities where gold was reported to have been discovered. The 

 district as a wliole, however, was not found to present any 

 promising signs of good results being achieved by its being worked. 



The Report concludes with analyses of various minerals by 

 ]Mr. E. S. Simpson, mineralogist and assayer to the Survey. These 

 minerals include tantalum, natural nitrates, crocidolite, graphite, and 

 chromiferous laterite. 



The work dealt with in Bulletin No. 21 combines both the 

 geology and topography of the district explored, which covers an 

 area of about 46 square miles, embracing, as far as it is understood, 

 the productive area of Norseman. 



That portion of the Dundas Goldfield embraced by Mr. Campbell's 

 work consists essentially of a series of metamorphic sedimentary 

 rocks, estimated to reach a thickness, making allowance for 

 repetition by folding, of not more than 800 feet, which occupies 

 a strip of country skirting the west side of Lake Dundas. Some 

 of these ancient sediments appear, according to Mr. Campbell's 

 observations, to have been permeated by secondary silica and oxide 



