成因

The wallrock alterations of gold mineralization include silicification,pyritization,sericitization,potassic alteration,chloritization and carbonitization.

根据常福龙沟金矿成矿地质特征,矿床成因属构造蚀变岩型。

The study carry out researches into c auses of skin melanine and skin -whit ening mechanism.

研究探讨了皮肤黑色素的成因和皮肤美白机理。

Effect of little-plants of Welsh onion (Alliums fistulosum L.) on yield was studied.

摘要对秋大葱不成株成因及其时产量影响分析表明，遗传和栽培因素同时影响大葱不成株的产。

Many causes of urine diseases, including exopathy and internal injury, may cause the change of urine.

引起小便病的成因甚多,无论外感、内伤都可出现小便的改变。

Electronmicroscopic examination shows that Ti-oxide (rutile or anatase) is replaced by brannerite, indicat-ing the metasomatic origin of brannerite.

在电镜下观察到钛铀矿与钛的氧化（金红石或锐钛矿）成交代关系，说明钛铀矿是交代成因的。

It is suggested that the high-wax oil is mainly originated from terrestrial higher plant, while lower hydrobiont is accidental.

研究表明，该地原油成因主要是陆源等植物贡献，而低等水物居次要地位。

Middle-Upper Cambrian dolomites in Shimen,Hunan Province,are mainly composed of anhedral micritic dolomite,euhedral and subhedral granular dolomites,grain dolomite.

湖南石门中上寒武统白云岩极其,型多样,不同型的白云岩其成因机理和白云石化模式各不相同。

R-mode factor analysis has proved very useful in distinguishing geochemical data, clearly dominated by anthropogenic in comparison to geogenic sources.

型因子分析已被证明在鉴别地球化学资料方面是非常有用的，它主导着人为成因和地球成因来源的对照。

The lead isotope study shows that ores of the Mujiazhuang copper deposit and the host rocks contain very high radiogenic lead.

研究表明，穆家庄铜矿矿石铅和近矿围岩岩石铅具有极的放射性成因铅特点。

When the regional extension is disharmonic with the basement structure and movement, complicated fault assemblages can be form during progressive deformation.

在此基础上，结合理论分析，提出了复杂断层组合成因的另一种模式——不协调伸展递进变形模式。

From the viewpoint of the hydrogeological environment,this paperdescribes the genesic types,prospecting direction and its way of deve-lopment of the spring in Jianregion.

本文从水文地质环境着手，论述了吉安地矿泉水的成因型、找矿方向及其开利用途径。

Lead and selenium mainly exist in galena, clausthalite, and selenio-galena which occur as cell-filling of coal-forming plants and are of chemical-sedimentary origin.

铅和硒主要赋存在方铅矿、硒铅矿和硒方铅矿中，这3种矿物以植物胞腔充填形式出现，属于化学沉积成因。

Ichnofabric analysis displays a rising significance on accurate environmental interpretation of sedimentary units in oil-bearing basin and precise recognition of depositional disconuities.

近年来，遗迹组构分析其日益增长的意义主要表现在含油气盆地地层单元成因环境的精确解释和各不连续面的精细识别。

It has shown that they can be used neither for appreciation of equilibrium state of the earth, nor for the explanation of tectogenesis.

业已证明，这些模型既不能用以正确评估地球的平衡状态，也不能用以解释构造成因。

The finite element program design method has laid a solid foundation for in depth reseach of physical thoracic impedence rheogram wave form. ?

该程序设计方法为进一步深入研究人体胸腔阻抗血流图波形的成因打下了基础。

As is well known the regional tectonic stress field is of great importance to the study of seismogenesis, earthquake prediction and earth dynamics.

域构造应力场对于研究地震成因、地震预报和地球动力学都具有重要的意义。

The auth or suggests that prebiological informational structures,gene predecessors and protoorganisms should be looked for among abiogenic ordered hydrocarbon molecul ar systems(hard bitumens).

文章提出，应在非物成因有序碳氢分子体系(硬沥青)中寻找前物信息结构、基因之祖和原有机体。

This paper has approached to the cause for grinding"sense of ad-hesion"and formation of burrs of ram mate part of oil pump in cold working.

本文探讨了油泵柱塞在冷加工中的磨削粘感和毛刺成因问题。

The alabandite and getchellite of hydrothermal origin, cement anatase of alkaline volcanic origin, and the high content of chlorite in coal were fist found in coals.

在西南地晚二叠世煤中首次现了热液成因的硫锰矿和硫砷锑矿、碱性火山灰成因的胶态锐钛矿和陆源碎屑成因的斜绿泥石。

The volcanogenic deposits hosted in differential yolcanic rock series and cogenetic deposits hosted in undifferential baste volcanic rock series have been divided and studied in this paper.

笔者通过研究，分出了分异火山岩系中的火山成因矿床和未分异基性火山岩系中的共矿床，认为前者的金属聚集与岩浆分异有密切关系。