拉斑玄武岩 meaning in English
tholeiite
tholeiitic basalt
Examples
- The tholeiite with late trassic age has been found in helanshan area on the north part of western margin of ordos basin
在盆地西缘北部贺兰山地区，发现典型拉张环境形成的拉斑玄武岩，测年时代为晚三叠世。 - By studying , the main conclusions have been achieved as follows : i . the volcanic rocks , as the result of the partial melting of enriched mantle , comprise calc - alkaline andesite and dacite and a few tholeiite
通过研究，得出以下主要认识： 1 、火山岩为一套以钙碱性安山岩为主，含少量拉斑玄武岩和英安岩。 - Two ree distributed pattern , lree - depleted and flat , which display a specific character of typical mid - ocean ridge tholeiite , indicate that primary magma may be derived from near primary or a typical large ion lithophile element ( lile ) - depleted mantle
岩石稀土元素配分模式可分为lree平坦型和lree亏损型两类，指示了其原始岩浆起源于近原始或典型的大离子元素亏损型的地幔，为典型的大洋中脊拉斑玄武岩的特征。 - Cu - ni sulfided mine complex locate in baimazai of jinping county is sub alkali iron - super iron , it ' s zoning is clear and it ' s ni - cu - co melting first and enrichment , its rare earth is rich in right lean light rare earth , but eu in olive rock is serious to be bad , gd - tb is tittles negative abnormity . above - mentioned show that the mineral is cone from mantle , and didn " t mix with crustal substance , and continent tholeiite magma turning into continent tholeiite emplacement after by surging
金平白马寨铜镍硫化矿床杂岩体分带明显、属亚碱性铁质-超铁质岩、具ni - cu - co三元素先熔离，后富集的规律、稀土配分为右倾斜轻稀土富集型，但橄榄岩铕亏损显著， gd - tb微小负异常，显示成矿物质来源地幔，与地壳物质无混染和大陆拉斑玄武岩浆上涌后变为大洋拉斑玄武岩浆侵位特点。 - 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。