ocean crust meaning in English
大洋地过
Examples
- Jurassic and cretaceous , the marginal ocean basin was in the stage of ocean crust evolution and had a setting similar to mid - ocean ridge
侏罗白垩纪为洋盆洋壳演化期，处于类似洋中脊的构造环境。 - Sea salt not only dissolves from rocks , it also reacts with the rocks of the ocean crust and volcanic lava . the reactions take some of the salts in seawater away from the sea
岩石溶解产生海盐，而同时，海盐又与大洋地壳中的岩石和火山熔岩进行化学反应，从而把一部分盐分从海水中带走。 - The independent jiangda tectonic belt has appeared since late carboniferous , following the jinshajiang ocean crust of subducted beneath the changdu continental crust and the continental margin arc formed in east of changdu terrane
自晚石炭世金沙江洋洋壳开始向昌都陆壳地体边缘下俯冲，形成陆缘弧以来，独立的江达构造带就得以产生。 - The analysis of the geochemical and petrologic characteristics features shows that the assemblage of volcanic rocks is the series of middle ocean ridge basalt , ocean island basalt and ocean island andesite basalt , which implies that it is the relic of the ocean crust , i . e . typical ophiolites
通过岩石特征和地球化学分析，确定了盐边群荒田组火山岩组合为洋脊玄武岩、洋岛玄武岩、洋岛安山玄武岩系列，说明这是洋壳残片，即典型的蛇绿岩套。 - Thus , they might be derived from a back - arc basin with an archipelagic system in paleo - tethys , instead of a large ocean basin . the isotopic geochemistry shows that the jinshajiang ophiolitic melange has higher e nd ( t ) values ( + 7 . 42 - + 5 . 44 ) , suggesting that it may be derived from a lree depleted mantle source without significant contamination by the continental crust , but affected slightly by a fluid from a subducted ocean crust
同位素地球化学研究表明，金沙江蛇绿混杂岩具有较高的_ ( nd ) ( t )值( + 7 . 42 + 5 . 44 )暗示蛇绿岩来源于lree长期较亏损的地幔源，演化过程中没有受到陆源物质的明显混染，而主要受到少量俯冲洋壳析出流体的影响。