Ore Deposits a Discussion Re Published From the Engineering And Mining Journal
Ore Deposits a Discussion Re Published From the Engineering And Mining Journal
Lew Wallace
The book Ore Deposits a Discussion Re Published From the Engineering And Mining Journal was written by author Lew Wallace Here you can read free online of Ore Deposits a Discussion Re Published From the Engineering And Mining Journal book, rate and share your impressions in comments. If you don't know what to write, just answer the question: Why is Ore Deposits a Discussion Re Published From the Engineering And Mining Journal a good or bad book?
What reading level is Ore Deposits a Discussion Re Published From the Engineering And Mining Journal book?
To quickly assess the difficulty of the text, read a short excerpt:
Until within very recently some investigators have claimed that an original deposit of gold without quartz was an unobserved phenomenon. Mr. Spurr, as I understand him, maintains that the derivation of a gold-bearing vein uninterruptedly from a siliceous rock is not only a possibility, but is a plausible explana- tion for many of the occurrences in nature. He eliminates the break in the continuity of phenomena which is a neces- sary accompaniment to the formation of a vein in a previ- ously exi...sting fissure. Without taking up here the various definitions of a vein which have been advanced, I would suggest that Mr. Spurr has rather overlooked the physical side of the question in his desire to lay stress on the chemi- cal activity involved. If the occurrences to which he draws attention are quartz segregations, even though they contain sulphides of the metals, and are payably aurifer- ous, they constitute a very exceptional class of veins, ac- cording to my understanding of the term. Indeed, I ques- tion if they should be classed as veins at all.
You can download books for free in various formats, such as epub, pdf, azw, mobi, txt and others on book networks site. Additionally, the entire text is available for online reading through our e-reader. Our site is not responsible for the performance of third-party products (sites).
User Reviews: