alkali basalt meaning in English
碱性玄武岩
碱性柱石岩
Examples
- Calc - alkali basalt
钙碱性玄武岩 - The distinct spatial distribution of the tholeiitic and alkali basalts at datong may be related to the effect of local lithospheric extension on the passive upwelling of asthenosphere and variable extents of interaction between lithosphere and asthenosphere
大同两类玄武岩在空间上分野明显，可能与桑干河断裂对软流圈地幔上涌的控制以及区域上岩石圈-软流圈作用程度的变化有关。 - The early tertiary alkali basalts from yangyuan which contain abundant mantle xenoliths exhibit very homogeneous sr - nd isotopes with snd = 5 . 5 . their pb isotopes are similar to those of the depleted mantle ( dm ) and their trace element characteristics resemble those of oceanic island basalts ( oib )
含幔源包体的阳原早第三纪碱性玄武岩具有均一的sr - nd同位素组成( nd 5 . 5 ) ，其pb同位素组成与亏损地幔( dm )相似。 - The compositions of usual elements and rare earth elements and inclusions of corundum megacrysts related to alkali basalt in changle , shandong province , are analyzed . in the main parts of corundum megacrysts are a large number of fluid - melting inclusions , zircon , ta - columbite inclusions , and in the central crystal core are a large number of melting inclusions . the corundum megacrysts were formed in different periods and different physical chemistry conditions . the crystal core was formed in magma system , and the main parts were formed in inhomogeneously geochemical conditions in which magam and fluid phases coexisted
分析山东昌乐与碱性玄武岩有关的刚玉巨晶不同部位的常量元素、稀土元素及包裹体组成.刚玉巨晶的主体以大量流体?熔体包裹体、锆石、铌(钽)铁矿包裹体为主，而巨晶中的“晶核”部位则以大量的熔体包裹体为主，反映研究区的刚玉巨晶是在不同的阶段形成的.刚玉“晶核”以及“铜皮刚玉”形成于熔体相为主的体系中，而主体刚玉则形成于熔体?流体过渡的急剧变化的不均一的地球化学环境中 - Given their oib - type trace element pattern and depleted sr - nd isotop ic composition , the datong alkali basalts are interpreted to be generated within the asthenospheric mantle but at a shallow depth compared to the yangyuan alkali basalts . the datong tholeiitic basalts exhibit low snd values ( 1 - 4 ) . their sr - pb and nd - pb isotopic correlations are consistent with a mixing between the depleted mantle and emi - like component
大同地区第四纪时期同时产出碱性和拉斑玄武岩，碱性玄武岩也主要来自于软流圈地幔，岩浆起源深度小于阳原样品；拉斑玄武岩具有较低的nd ( nd = 1 - 4 ) ， pb - nd以及pb - sr同位素相关关系暗示其可能是dm和型富集地幔( emi )组分之间混合的结果，反映了软流圈和岩石圈地幔之间的相互作用，岩浆起源较浅。