英语词汇“chalcocite”造句的方法、技巧、例句及翻译-英语例句辞典

The production of copper from chalcocite is performed by roasting the Cu2S in air to produce the Cu. Chemistry 2019-02-14T00:00:00Z

Orvana has received approval to mine chalcocite, a mineral that is primarily copper, in a project here that the company says will create $2 billion in economic activity over 20 years. In Mining, Some Michigan Towns See Hope 2012-05-25T02:45:05Z

Owing to the frequent presence of mechanically admixed chalcopyrite and chalcocite, the published analyses of erubescite show wide variations, the copper, for example, varying from 50 to 70%. Encyclopaedia Britannica, 11th Edition, Volume 9, Slice 7 "Equation" to "Ethics" 2011-02-27T03:00:31.973Z

Copper is known to be taken into solution as copper sulphate at the surface, and to be redeposited as chalcocite where these sulphate solutions come in contact with chalcopyrite or pyrite below. The Economic Aspect of Geology

In the easy recognition of the secondary copper sulphides, chalcocite, bornite, etc., the engineer finds a finger-post on the road to extension in depth; and the directions upon this post are not to be disregarded. Principles of Mining Valuation, Organization and Administration

Below this is a zone carrying copper in the form of chalcopyrite, enriched by chalcocite deposition from above, ranging in thickness up to 400 feet. The Economic Aspect of Geology

While some chalcocite is clearly the result of secondary enrichment from above, other chalcocite seems to have been related closely to the primary deposition. The Economic Aspect of Geology

With the removal of some of the protecting zone of chalcocite the protore is again exposed to oxidation and a second cycle of enrichment begins. The Economic Aspect of Geology

Not only has the process been duplicated in the laboratory, but the common coating of chalcocite around grains of pyrite and chalcopyrite below the water level indicates that this process has been really effective. The Economic Aspect of Geology

At Butte for instance, secondary chalcocite is clearly to be recognized. The Economic Aspect of Geology

The natural inference was that as the veins were followed deeper the proportion of chalcocite would rapidly diminish, and that a leaner primary zone of chalcopyrite, enargite and other primary minerals would be met. The Economic Aspect of Geology

The present tendency at Butte is to consider as secondary chalcocite only certain sooty phases to be found in upper levels. The Economic Aspect of Geology

The solid masses of chalcocite in the Kennecott copper mines seem hardly explainable as the result of secondary sulphide enrichment. The Economic Aspect of Geology

No traces of other primary minerals are present and the chalcocite here is regarded as probably primary. The Economic Aspect of Geology

In the United Verde Mine, oxidizing conditions at present prevail to the bottom of the chalcocite zone. The Economic Aspect of Geology

The primary copper mineral in the limestone is chalcocite, in exceptionally rich and solid masses, showing no evidence of having replaced earlier sulphides. The Economic Aspect of Geology

Below the oxidized and leached zone there is evidence of deposition of a large amount of secondary copper sulphide in the form of chalcocite. The Economic Aspect of Geology

The essential fact appears to be that as enrichment progresses and chalcocite increases the process of enrichment becomes slower in action, and erosion may, in some circumstances, overtake it. The Economic Aspect of Geology

单词	chalcocite
例句	chalcocite The production of copper from chalcocite is performed by roasting the Cu2S in air to produce the Cu. Chemistry 2019-02-14T00:00:00Z Orvana has received approval to mine chalcocite, a mineral that is primarily copper, in a project here that the company says will create $2 billion in economic activity over 20 years. In Mining, Some Michigan Towns See Hope 2012-05-25T02:45:05Z Owing to the frequent presence of mechanically admixed chalcopyrite and chalcocite, the published analyses of erubescite show wide variations, the copper, for example, varying from 50 to 70%. Encyclopaedia Britannica, 11th Edition, Volume 9, Slice 7 "Equation" to "Ethics" 2011-02-27T03:00:31.973Z Copper is known to be taken into solution as copper sulphate at the surface, and to be redeposited as chalcocite where these sulphate solutions come in contact with chalcopyrite or pyrite below. The Economic Aspect of Geology In the easy recognition of the secondary copper sulphides, chalcocite, bornite, etc., the engineer finds a finger-post on the road to extension in depth; and the directions upon this post are not to be disregarded. Principles of Mining Valuation, Organization and Administration Below this is a zone carrying copper in the form of chalcopyrite, enriched by chalcocite deposition from above, ranging in thickness up to 400 feet. The Economic Aspect of Geology While some chalcocite is clearly the result of secondary enrichment from above, other chalcocite seems to have been related closely to the primary deposition. The Economic Aspect of Geology With the removal of some of the protecting zone of chalcocite the protore is again exposed to oxidation and a second cycle of enrichment begins. The Economic Aspect of Geology Not only has the process been duplicated in the laboratory, but the common coating of chalcocite around grains of pyrite and chalcopyrite below the water level indicates that this process has been really effective. The Economic Aspect of Geology At Butte for instance, secondary chalcocite is clearly to be recognized. The Economic Aspect of Geology The natural inference was that as the veins were followed deeper the proportion of chalcocite would rapidly diminish, and that a leaner primary zone of chalcopyrite, enargite and other primary minerals would be met. The Economic Aspect of Geology The present tendency at Butte is to consider as secondary chalcocite only certain sooty phases to be found in upper levels. The Economic Aspect of Geology The solid masses of chalcocite in the Kennecott copper mines seem hardly explainable as the result of secondary sulphide enrichment. The Economic Aspect of Geology No traces of other primary minerals are present and the chalcocite here is regarded as probably primary. The Economic Aspect of Geology In the United Verde Mine, oxidizing conditions at present prevail to the bottom of the chalcocite zone. The Economic Aspect of Geology The primary copper mineral in the limestone is chalcocite, in exceptionally rich and solid masses, showing no evidence of having replaced earlier sulphides. The Economic Aspect of Geology Below the oxidized and leached zone there is evidence of deposition of a large amount of secondary copper sulphide in the form of chalcocite. The Economic Aspect of Geology The essential fact appears to be that as enrichment progresses and chalcocite increases the process of enrichment becomes slower in action, and erosion may, in some circumstances, overtake it. The Economic Aspect of Geology
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