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沉积作用

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Deposit characters have fine succession, however, because of the underwater distributary channel's movement and migration, the scale of the shallow deposits and delta front deposit were different.

沉积作用都有很好的继承性,但浅湖沉积分布范围以及三角洲前缘砂体的规模和展布特征随着水下分流河道的迁移和摆动而有所不同。

Deposit characters have fine succession, however, because of the underwater distributary channels movement and migration, the scale of the shallow deposits and delta front deposit were different.

沉积作用都有很好的继承性,但浅湖沉积分布范围以及三角洲前缘砂体的规模和展布特征随着水下分流河道的迁移和摆动而有所不同。

Carbonates also occupy an important component, with E271 from 5.9% to 27.57% and E272 from 6.67% to 38.20%. A few foraminifer fossils were found in the sediment cores. These sediments are rich in Cu, Pb and Zn which are fallout from hydrothermal plume with iron oxides.

热液桩的沉积作用,使Cu、Pb和Zn在沉积物中富集,Cu/Fe、Pb/Fe和Zn/Fe比值低于热液喷口处的颗杜物中值,Pb表现出在海水中运移距离较短或者只有少量Pb随热液柱扩散运移。

At the stage of geosyncline, the huge thick sal geo synclinal structural layer would be formed by volcanism and weathering deposition; the Caledonion granites would be form ed by remelting or mix-melting.

地槽阶段,火山作用及风化沉积作用等形成了巨厚的硅铝质地槽构造层;重熔或混熔(包括混合作用和/或同化混染作用)形成了加里东花岗岩类。

It is revealed from the analysis that the distribution, composition, lithofacies changes, and the formation mechanism and age of the relict sand are not consistent with the present depositional environment of this area.

它是在晚大理冰期最低海面后海平面不断上升过程中不同阶段的滨海相沉积,从冰后期海平面大规模上升以来,沉积作用在这些地区是微不足道的或者竟完全缺失,从而使砂质沉积直接裸露在海底表面,未被现代沉积所覆

It is nothing else than impurities prenatally inherent in ore that seriously affect the quality of the latter, which is formed as a result of geological vicissitudes including diastrophic movement, eruption of volcano, sedimentation, glaciation and weathering etc., under the action of which pyrogenic rocks, volcanic complex, aqueous rocks, sedimentary rocks etc., come into being, some of which exist in a stage of symbiosis, the main cause of the absence of pure rocks in nature, wherein lies the reason for the need of separation technology and apparatus, namely, ore-dressing devices and equipment, so far impotent to meet the requirements of metallurgical industry the scientists make every endeavor to elevate to a new high by laser separation.

矿石中天然固有的杂质严重影响其后来的质量。矿石的形成是地质变迁的结果,包括地壳运动,火山爆发,沉积作用,冰河作用和风化等等,在这些作用下,生成了火成岩,火山杂岩,水成岩和沉积岩等,一些矿石是由于这些作用共同形成的,这就是自然界中没有纯净矿石的原因。由于这些原因的存在,需要用分离技术和器械,也就是矿石加工设备对矿石进行的分割,迄今为止这些矿石加工设备已经不能够满足冶金工业的需要,科学家们力图用激光把冶金工业提高到一个新的水平。

The paragenetic relationship of hydrothermal sedimentogenic cherts and copper polymetallic deposits manifest that the copper polymetallic deposits are formed by the submarine hydrothermal exhalative lithogenesis and mineralization.

热水沉积硅质岩与铜多金属矿床的共生关系证明研究区铜金属矿床的成因是海底热液喷流沉积作用

By studying reservoir rock characteristics, diagenesis and physical property, investigation showed that there were distributary channel, branch channel, mouth bar, distal bar, sand sheet, lakeshore, shallow lake and limestone flat . we concluded that the reservoir of N1~N21 is low porosity and permeability reservoir with the types of primary porosity and secondary intergranular porosity, which is in the early diagenetic stage B into the late diagenetic stage A subperiod. The role of effecting reservoir physical property is deposition, cementation, dissolution and tectonic rupture. After researching of reservoir, we divided it into three categories and division the favorable facies belt and relatively favorable. We think that the favorable facies belt is braided river delta front and partly shallow lake in east of the Fault Ⅶ. favorable reservoir is in the first and the second class.

进一步研究了本区碎屑岩储层的岩石学特征、成岩作用特征、物性特征,研究认为该区储集体类型有分流河道砂体、分支河道砂体、河口坝、远砂坝、席状砂砂体、滨湖砂滩、浅湖砂坝砂体及灰坪;N1层属于低孔、特低渗储层,孔隙类型以原生、次生粒间溶孔为主;分析了影响储层物性的因素主要为沉积作用、胶结作用、溶蚀作用和构造破裂作用;进行了储层评价与有利相带预测,将储层分为三类并划分了有利区带、较有利区带,认为Ⅶ号断层以东的辫状河三角洲前缘亚相和部分浅湖亚相是N1的有利储集相带,储层以Ⅰ、Ⅱ类为主。

The depositional energy is low, the abyssal plain is flat and nearly horizontal, and find-grained sediments are deposited slowly by waning turbidity currents or from suspension in the water.

沉积作用的能量是最低的,深海平原是平坦的近于水平,水中的细粒沉积物通过微浊流或从悬浮状态下缓慢地沉积。

Paleoceanographic and paleoclimatic studies based on the magnetic properties of shelf sediments with high sedimentation rates like those in the Korea Strait are also unlikely to provide a meaningful signature associated with syn-depositional environmental processes.

根据诸如朝鲜海峡这样高沉积速率的陆架沉积物的磁学特征进行古海洋学和古气候研究,也不可能提供有意义的、同沉积作用过程的信息。

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