Tungsten Ores
Tungsten Ores
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In our eReader you can find the full English version of the book. Read Tungsten Ores Online - link to read the book on full screen. Our eReader also allows you to upload and read Pdf, Txt, ePub and fb2 books. In the Mini eReder on the page below you can quickly view all pages of the book - Read Book Tungsten Ores
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Hess, of the United States Geological Survey : " In the Great Basin region of the United States, a broad belt of limestones, extending from the north-western part of Utah westerly across the central and southern-central parts of Nevada, thence swinging southward along the Sierra Nevada and around its southern end, has been intruded by granites which have brought with them tungsten-bearing solutions from which scheelite has been deposited in the meta- morphosed limestones. The deposits are as va...riable in com- position and in size and distribution as are most contact- metamorphic deposits. In places they are largely iron-garnet with dark green epidote. In other places iron is much less in evidence, and the garnets are light coloured and the epidote is also very light coloured. Hornblende forms a large part of a few deposits, and in many others is nearly absent. The ore is ' patchy/ and although spots are rich, in general the WO 3 content ranges from i to 2 per cent. The tungsten mineral is invariably scheelite, generally white, although a little is glassy, some is dark grey, and much is yellowish.
What to read after Tungsten Ores?
You can find similar books in the "Read Also" column, or choose other free books by R H Robert Heron Rastall to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
Hess, of the United States Geological Survey : " In the Great Basin region of the United States, a broad belt of limestones, extending from the north-western part of Utah westerly across the central and southern-central parts of Nevada, thence swinging southward along the Sierra Nevada and around its southern end, has been intruded by granites which have brought with them tungsten-bearing solutions from which scheelite has been deposited in the meta- morphosed limestones. The deposits are as va...riable in com- position and in size and distribution as are most contact- metamorphic deposits. In places they are largely iron-garnet with dark green epidote. In other places iron is much less in evidence, and the garnets are light coloured and the epidote is also very light coloured. Hornblende forms a large part of a few deposits, and in many others is nearly absent. The ore is ' patchy/ and although spots are rich, in general the WO 3 content ranges from i to 2 per cent. The tungsten mineral is invariably scheelite, generally white, although a little is glassy, some is dark grey, and much is yellowish.
What to read after Tungsten Ores?
You can find similar books in the "Read Also" column, or choose other free books by R H Robert Heron Rastall to read onlineMoreLess
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