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源重的英文

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  • Secondly , based on the microbeam analytical technique , on the one hand , through investigating the characteristic of major elements in the mantle minerals the author acquired the static information from mantle ; on the other hand , through multi - point analysis of a part of the minerals from mantle , the auther got dynamic information from mantle . finally , generalizating the fruits of this study and predecessors , the autor holds that the constituents of lithospheric mantle possibly includes spinel lherzolites , clinopyroxenites , websterite , dunite , harzburgites , garnet lherzite , phlogopite lherzite , eclogites , clinopyroxene megacrysts ; compared with east china and north china platform , the research field mantle shows the characteristics of higher degree of partial melting processes and more depleted mantle ; the . upper mantle beneath north hetian area is heterogeneous , with a tendency of deficit in a12o3 and lree from kaliyang in west hetian to the river basin of kalakshi river and yulongkashi river ; the subduction of the crust beneath north hetian has ever occurred in geological history and caused the mixing of mantle - crust ; the depth of the origination of basaltic magmas beneath north hetian exceeds 73km ; the thickness of the lithosphere beneath the research area amounts to 204 . 9km ; the mantle beneath north hetian has geological condtions for forming diamond deposits
    最后,綜合本區(qū)幔源礦物和地幔巖石的特征以及地球物理資料,得出如下結論:本區(qū)上地幔的物質組成有尖晶石二輝橄欖巖、二輝巖、單斜輝石巖、純橄欖巖、方輝橄欖巖、石榴石二輝橄欖巖、金云母二輝橄欖巖、榴輝巖;與中國東部以及華北地臺上地幔相比,研究區(qū)上地幔具有富集主元素中相容元素和虧損其中的不相容元素的特征,局部熔融程度較高;上地幔存在橫向和縱向的不均一性,從西部的克里陽到喀拉喀什河和玉龍喀什河流域, al和lree富集程度呈下降趨勢,不同來源的相同礦物中主元素的含量差異較大;地質歷史時期這里可能發(fā)生過地殼俯沖并產(chǎn)生殼?;旌献饔?;玄武巖漿的起源深度73km ;從幔源重砂礦物的溫壓估算結果,可以推斷出巖石圈厚度可達204 . 9km ;綜合巖石圈物質組成特征、巖石圈熱狀態(tài)、地幔溫壓狀態(tài)、氧逸度以及幔源巖石和幔源礦物的化學成分,認為研究區(qū)具備了金剛石成礦地幔地質條件。
  • Because of the absence of mantle xenoliths and xenocrysts , it is the first time that this paper looks on the native heavy minerals deriving from mantle , which were collected at the terraces of the two rivers , kalakshi river and yulongkashi river , as objects and takes into account the geochemical characteristics of the rocks deriving from mantle such as keliyang lamproite and so on to study the composition of lithospheric mantle , the characterics of palaeozoic era lithospheric mantle , mantle thermal state , and diamond metallogentic mantle geological conditions in research field
    為達到研究目的,本文首次以喀拉喀什河和玉龍喀什河沿岸階地的幔源重砂礦物(單斜輝石、鉻尖晶石類礦物、鈦鐵礦以及石榴石)為研究對象,結合鉀鎂煌斑巖等區(qū)內已發(fā)現(xiàn)的幔源巖石及其中地幔物質對該區(qū)地幔物質的組成、古生代巖石圈地幔特征、巖石圈熱狀態(tài)以及該區(qū)金剛石成礦地幔地質條件做了嘗試性的研究工作。
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