The occurrence of gold rich carbonaceous rock series and the extensive development of altered rock bodies in the region made the mobilization and concentration of gold possible.
区域上赋金层炭质岩系的存在和蚀变体的广泛发育，使金元素活化、富集成为可能。
That is a necessary but not a sufficient condition, as the type of rock involved, called carbonaceous chondrite, is found in other asteroids, too.
他有两方面的证据：第一，现存的灾难性撞击的残骸与Baptistina和她的后代有相同的成分，这是必要条件，但并非充分条件，因为含碳的球粒状陨石在其它小行星上也有；
Coal is a sedimentary rock composed principally of organic carbonaceous macerals and inorganic minerals.
煤是一种有机沉淀岩，主要包括有机碳化合物和无机矿物。
New 730e frother was used in the flotation tests of common oxidized copper ore, oxidized copper ore with high combination rate and carbonaceous slabby rock copper ore of Tangdan copper Mine.
采用730e新起泡剂对汤丹铜矿的一般氧化铜矿、高结合率氧化铜矿和碳质板岩铜矿3种矿样进行了浮选试验。
The ore-bearing rock are mainly fine elastic rocks, breccia of albite-carbonate and carbonaceous- siliceous argillaceous rock.
主要容矿岩石为浅变质细碎屑岩，钠长碳酸盐角砾岩及碳硅泥质岩；
The ore-bearing rock are mainly fine elastic rocks, breccia of albite-carbonate and carbonaceous- siliceous argillaceous rock.
主要容矿岩石为浅变质细碎屑岩，钠长碳酸盐角砾岩及碳硅泥质岩；
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