物理风化

黄河中游黄土的REE组成及流域物理风化决定了黄河沉积物的REE特征；而长江流域复杂的源岩与较强的化学风化控制了长江沉积物的REE组成特点。

REE composition in loess in the middle Yellow river and extensive physical weathering in drainage basins have great influence on REE characteristics in the Yellow river sediments , whereas complex source rock and chemical weathering controlled the REE composition and distribution in the Yangtze river sediments .

影响裂缝发育的主要因素是构造、物理风化和化学淋溶作用。

The main factors influenced fractures development are the tectogenesis , the physical weathering and the chemical dissolution .

物理风化和断裂构造是形成泥石流松散固体物质的重要过程；

Physical weathering and rift structure are the important process to form the loose solid materials in mud-rock flow .

变质岩储集空间形成主要有：结晶成因、构造成因、物理风化成因、化学淋溶成因。

The factors related with metamorphic reservoir space are crystallization , structure , physical weathering , and chemical eluviation .

沙漠化过程可分为3个阶段，即物理风化与沙源积聚阶段、风沙作用阶段和沙漠化阶段。

The process of sand desertification can be divided into 3 stages : physical weathering and accumulation of sand source stage ; windblown and sandblast stage ;

同时指出，泥石流沉积属于近源快速沉积，沉积时遭受的物理风化作用和化学风化作用均较微弱。

During the period of its deposition , the source area was quite near and quickly deposited , and both physical and chemical weathering were all rather weak .

新生代以来，山体上升，在构造节理的主导下，配合物理风化及部分地表流水作用，逐步发展成为白云石大理岩构造峰林。

Since the Cenozoic this mountain has risen and owing to structural jointing , combined with mechanical weathering and surface water erosion , it has gradually become a dolomitic marble " peak forest " .

更新世阶段地壳迅速的抬升、外力的物理风化作用，特别是晚更新世间歇性山区洪水的冲蚀，是形成嶂谷的直接原因。

The rapid crustal uplift in the Pleistocene and physical weathering and erosion , especially the erosional process of the flood in the mountains , are the direct causes for the formation of the gorges .

生物无时无刻不参与地球表层矿物和岩石的风化，但以往的研究大多注重物理风化与化学风化作用，对生物风化作用关注很少。

Although organisms always participate in the weathering of mineral and rock on the earth surface , much attention was paid to the physical and chemical processes , but little attention to the biological process in previous studies of weathering .

重矿物种类较多，但以较稳定的锆石和电气石为主，代表湿热气候条件下既有物理风化又有化学风化，碎屑物质经长距离搬运至滨海地区堆积的产物。

Being mostly zircon and tourmaline , which indicated that the clastic materials were resulted from physical desintegration and chemical decomposition under tropical climate conditions , and then were transported for long distance to littoral areas and finally deposited there .

粘土型海泡石矿是由含海泡石的原岩经长期的物理、化学风化改造而成的。

Clay-type sepiolite deposit was formed from sepiolite-bearing original rock , which suffered from long-term physical , chemical weathering alteration .

作者引用硅质岩屑物理性质及抗风化能力的实际数据，认为硅质岩屑应归入石英端元；

In view of the physical nature especially and the capability of resistance to weathering , the author places the siliceous fragments into quartz group .