acidic volcanic rocks的用法和样例：
- There is a large area of Masozoic acidic volcanic rock in southeastern China,which is an important area of volcanic uranium deposits.
- With the increase of SiO2,from the basic volcanic rock to the acid volcanic rock,the fractional degree of HREE and LREE becomes more and more high.
- Moreover, there are metallogenetic specializations of thick bedded basic lava hosted iron deposits and acid volcanic rock ...
- ore-bearing acidic volcanic rocks
- The volcanic rocks in Fenghuadian area are composed mainly of calc-alkaline acidic volcanic rocks, containing a small amount of alkaline intermediate or intermediate-acidic volcanics.
- The Nuilukeng lead-zinc deposit,located at the metallogenic belt of Mesozoic volcanic rocks in Eastern Fujian,was found in the Late Jurassic intermediate-acidic and acidic volcanics.