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单词 Greenstone
例句
1. It was built with local greenstone, flint and chalk, by the monks from Wilmington Priory.
2. Most New Zealand greenstone is nephrite—a form of jade—though some is bowenite, another mineral.
3. It has many similarities to the greenstone belt in respect to the sequence of metamorphic complex, petrochemistry and trace element characters.
4. Granite greenstone - hosted , meta - clastics - hosted , volcanics - subvolcanics hosted and sedimentary rock - hosted micro - disseminated gold deposits are of industrial value.
5. Evidence from isotopic dating suggests that the greenstone belts vary considerably in age.
6. Some Archean greenstone belts represent collages of allochthonous fragments, among which oceanic crust slices are identified with characteristics distinct from the Phanerozoic ophiolites.
7. Massive sulfide Cu-Zn deposit of Hongtoushan type which occurs in Archeozoic granitic greenstone terrain in Qinyuan area of Liaoning possesses unique geochemical characteristics.
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8. Our study demonstrated that formation of gold deposits in greenstone belt and gold-bearing dark rock series, and hematite containing big gold grain gold might be controlled by mineral magnetism.
9. The composition of and some asumptions on the formation of Archaean greenstone belt arediscussed.
10. Nephrite is a semi - precious stone, a variety of jade ( sometimes called greenstone ).
11. In the world a lot of gold deposits occur in the early Precambrian greenstone belts.
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