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,综合本区幔源矿物和地幔岩石的特征以及地球物理资料,得出如下结论:本区上地幔的物质组成有尖晶石二辉橄榄岩、二辉岩、单斜辉石岩、纯橄榄岩、方辉橄榄岩、石榴石二辉橄榄岩、金云母二辉橄榄岩、榴辉岩;与中国东部以及华北地台上地幔相比,研究区上地幔具有富集主元素中相容元素和亏损其中的不相容元素的特征,局部熔融程度较高;上地幔存在横向和纵向的不均一性,从西部的克里阳到喀拉喀什河和玉龙喀什河流域, al和lree富集程度呈下降趋势,不同来源的相同矿物中主元素的含量差异较大;地质历史时期这里可能发生过地壳俯冲并产生壳幔混合作用;玄武岩浆的起源深度73km ;从幔源重砂矿物的温压估算结果,可以推断出岩石圈厚度可达204 . 9km ;综合岩石圈物质组成特征、岩石圈热状态、地幔温压状态、氧逸度以及幔源岩石和幔源矿物的化学成分,认为研究区具备了金刚石成矿地幔地质条件。
Because there are several periods of tectonic movement and several tectonic zones " development and complex superposition at da gangshan hydropower staion , geological structure in dam area is great complex and water - bearing media has the characteristic if inhomogeneity , which make it difficult to further clarify the burial condition of different bearing aqueous structure and the development of ground water system at the dam area 由于大岗山水电站坝区存在多期次的构造运动以及多个构造带的共同发育、复合叠加,使得坝区地质构造显得错综复杂以及含水介质的不均一性,使得进一步阐明坝区不同承压储水构造埋藏条件和坝区地下水系的发育特点变得很困难。
It is source of blazing new trails , basis of seeking orders , much important to the multi - objective mineral prediction and assessment based on systematic studies of the inhomogeneity , diversity , variety , intergrowth law , multiple properties and uses of earth mineral resources , the multi - objective mineral prediction and assessment goes deeply into practice from seeking anomaly or / and difference to order or / and law of ore - forming 求异是创新之源、求序之本,更是多目标矿产预测评价之关键。充分认识地球矿物质组成的不均一性、多样性、多变性、共生性和多用性等特征与规律,在求异的基础上求序,在求序的指导下进行科学预测与评价。
Further research of lithofacies pvove : lode country output points belongs to tidal - flat facies . and the two sides belong to littoral facies - estuarine facies . ore area petrochemistry analyse also prove : intraclast congeries silica rock in basin have higher cu , ag abundance than circumference pena . the prominence inhomogeneity of the cu distribution indicates reconstruct of the late construction 矿区内岩石化学测量也证明:盆地内发育的内碎屑堆积硅质岩比周围岩石具有更高的cu 、 ag元素地球化学丰度值, cu元素分布的显著不均一性,表明了后期构造的改造作用。
There are distributed a great number of cenozoic basalts and mantle derived xenoliths in north china and south china . for understanding the materials constitutes , evolution , mantle metasomatism , and inhomogeneity of the lower crust and upper mantle , there is a must of doing some research on these host basalts and the xenoliths 华北、华南地区发育大量新生代玄武岩及幔源包体,对其进行研究,有利于进一步深入了解下地壳和上地幔的物质组成、演化、地幔交代和不均一性以及地球物理反演结果的可靠性等。
The difference in the amount of species among counties were conspicuous : the number of species were more abundant in foping county , zhengba county , yang county , xixiang county , and chenggu county , where there were 33 , 28 , 27 , 22 and 20 species respectively , but there were less in lueyang county , mian county and hanzhong city where the amount were only 10 , 11 and 12 species respectively . the imbalance of species amount may be mainly relevant with the imbalance of local ecological facts 其中佛坪县、镇巴县、洋县、西乡县和城固县分布种类较多,种类数量分别为33种、 28种、 27种、 22种和20种;而略阳、勉县和汉中种类较少,分别为10种、 11种和12种,这种分布的不均一性的主要原因是与各县的生态环境的不均一性有关。
Observing critically the former research result of heterogeneity was defined as inhomogeneity of the field which controls and influences the flow and distribution of fluid in oil reservoirs , and it was divided into two types : micro - heterogeneity and macro - heterogeneity which was divided into internal , interbedded and lane heterogeneity again . their research contents and methods were respectively described 批判地吸收了前人非均质研究成果,首次从非均质性研究目的出发,将油层非均质性定义为控制和影响油层中流体流动和分布的场的不均一性,将非均质分为宏观和微观两大类,宏观又分为层内层间、平面非均质性,分析其各自的研究内容和研究方法。
Based on predecessors research by geological - geophysical synthesized studying and three - dimensional technique , draw up west , middle and east three composite profiles , explanation of the structure model in different level including surface , middle and deep of the basin , finally concluded in homogeneity of the basin is show by belting in south - north trend , block - faulting in east - west trend and vertical sphere - laying 在前人研究基础上,采用地质-地球物理综合研究和三维技术,编制了西、中、东部三条地学综合剖面,研究解释了盆地浅、中、深部不同层次的结构构造样式,得出盆地地壳结构不均一性规律。