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| Keywords: The Quarterly journal of the Geological Society of London (12512983613).jpg 1872 <br> DAINTREE GEOLOGY OF QIJEEN-SLAND <br> 29 <br> diggings by Mr Richard Smith of the School of Mines Jermyn <br> Street made with the sanction and assistance of Dr Percy to whom <br> Fig 15 ” View slioivlng the Intrusive Dylce of Diorite with the <br> Quartz-vein at the point of intersection with the Devonian Rods <br> at the Junction of Gilbert and Robertson Rivers <br> I am indebted for the use of laboratory and reagents to complete <br> the other analyses given in this paper gave ” <br> Gold 89-920 <br> Silver 9-688 <br> Copper 0-128 <br> Lead 0-026 <br> Bismuth none <br> Iron 0-070 <br> 99-832 <br> In considering the mode in which the gold was introduced into <br> these veins this constant association of silver is the chief difficulty <br> to contend with It is evident that the solvent and precipitant must <br> have been able to perform their functions on each simultaneously <br> All experiments based on the precipitation of gold alone from its <br> solutions afford no clue to the action which has taken place in nature <br> where the gold silver and other alloyed metals are entirely homo- <br> geneous <br> No case has yet been established in our museums where the gold <br> and silver are separated in the same specimen as is seen in speci- <br> mens of native copper and silver from Lake Superior <br> In several reefing-districts in Queenslandj however we have con- <br> VOL XXVIII PAKT I r 34985310 108770 51125 Page 297 Text v 28 http //www biodiversitylibrary org/page/34985310 1872 Geological Society of London Biodiversity Heritage Library The Quarterly journal of the Geological Society of London v 28 1872 Geology Periodicals Smithsonian Libraries bhl page 34985310 dc identifier http //biodiversitylibrary org/page/34985310 smithsonian libraries Information field Flickr posted date ISOdate 2014-02-14 Check categories 2015 August 26 CC-BY-2 0 BioDivLibrary https //flickr com/photos/61021753 N02/12512983613 2015-08-27 09 57 23 cc-by-2 0 PD-old-70-1923 The Quarterly journal of the Geological Society of London 1872 Photos uploaded from Flickr by Fæ using a script | ||||
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