1) upper mantle rock
上地幔岩
1.
In the former province, the upper mantle rocks consist of harzburgite and lherzolite, characterized by the concentration of mantle type elements (K T) and the smooth-weak enrichment type REE patterns; the ocean volcanic rocks are dominated by basic rocks of subalkaline and oceanic ridge type; lead isotopes are noted for 206Pb/ 204Pb<18.
前者上地幔岩有方辉橄榄岩和二辉橄榄岩 ,幔型元素 (KT)富集 ,REE呈平坦—弱富集型 ;大洋火山岩以基性岩、亚碱性、洋脊型为主 ;铅同位素2 0 6 Pb/2 0 4 Pb <18。
2) rocks layers of upper mantle
上地幔岩石分层
3) mantle xenolith
地幔岩
1.
REE in fluidmelt inclusions of mantle xenolith from Changbaishan are measured directly by ICPMS.
当前对地幔流体的REE研究,主要是通过对比富CO2包裹体与贫CO2包裹体的地幔岩或地幔矿物的测试分析来间接获得信息。
2.
Mantle xenoliths captured in alkali basalt occurs widely in the Liuhe district, Jiangsu province, China, dominantly by spinel lherzolite.
这说明同一地区地幔岩中裂隙硫化物和硫化物包裹体的成分存在某种继承关系 ,其硫化物成分与该地区地幔橄榄岩的来源深度 (或经历部分熔融时的深度 )有一定联
3.
The discovery of sulfide-melt inclusions in mantle xenoliths is of great significance in further understanding mantle depletion and enrichment, as well as ore-forming processes of mantle fluids.
浙江新昌一带晚第三纪碱性玄武岩中地幔岩(二辉橄榄岩)捕虏体内存在大量硫化物熔体包裹体。
5) mantle source rock
地幔源岩
6) Upper Mantle
上地幔
1.
From 6 months seismic data continuously recorded by stations directly set up in Tian shan area, We picked clear teleseismic P arrivals, and three dimensional velocity image of Tian shan crust and upper mantle was given with the ACH technique.
利用在天山地区直接布设的观测台站 ,进行六个月连续观测所取得的地震数据 ,挑选清晰远震的P波到时数据 ,采用ACH层析成像方法绘出了天山地区地壳和上地幔的三维速度图象 。
2.
Our discussion is focused on the location of the collision boundary between the Sino-Korea and Yangtze blocks in the Yellow Sea, the unusual upper mantle beneath the East China Sea continental shelf and its lithospheric formation and evolution, the cause of the high-velocity layer in the .
利用中国边缘海域近年的地震层析成像结果,根据速度异常和各向异性分析东海、黄海和南海北部的岩石层结构和构造,讨论中朝块体和扬子块体在黄海内部的拼合边界(黄海东部断裂带)、东海陆架盆地上地幔异常与岩石层形成演化、南海北部地壳底部高速层的成因及地幔活动等问题。
3.
Based on the petrological, petrochemical and geochemical analyses about these rocks, it is concluded in this paper that the xenoliths were originated from the upper mantle, and comprised of both primitive pyrolite and the infusible solid residual of the upper pyrolite while the basaltic magma was .
根据其岩石学、岩石化学及地球化学特征分析,包体来源于上地幔,其成因既有原始地幔岩,亦有上地幔岩经部分熔融出玄武岩浆后的难熔固相残留物,被火山喷发携带至地表。
补充资料：地幔岩
一种对原始地幔物质假想的岩石名称。D.H.格林和A.E.林伍德认为上地幔物质经部分熔融能产生少量玄武岩浆和大量剩下造山带阿尔卑斯型橄榄岩，设想橄榄岩和玄武岩按3:1～4:1的比例混合，即可得到原来地幔的化学组成，并计算其矿物组成为辉石、橄榄石和镁铝榴石。地幔岩的代表性模型是由3份阿尔卑斯型橄榄岩（橄榄石79％、斜方辉石20％和尖晶石1％）和1份夏威夷拉斑玄武岩组成的。得出的模型成分:SiO2为45.16％,TiO2为0.71％，AI2O3为3.54％，Fe2O3为0.46％,FeO为8.04％，MnO为 0.14％，MgO为 37.47％，CaO为3.08％，Na2O为0.51％,K2O为0.13％,P2O5为0.06％,Cr2O3为0.43％,NiO2为 0.20％，Fe2+/Mg+ Fe2+为0.10。地幔岩的成分随计算所用的橄榄岩和玄武岩的化学组成的不同及其混合的比值大小有所不同。还有,地球上现在见到的玄武岩能否代表原生岩浆仍有疑问，例如夏威夷拉斑玄武岩富含TiO2，据此计算的模型成分将有误差。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条