S - subaerial 中文 - EN166

subaerial adj.地面上的，地面上發生的；接近地面的。

subagent
The rock types comprise the delta front subfacies subaqueous distributary channel , channel - mouth bar and distal bar microfacies , and delta plain subfacies subaerial distributary channel microfacies sandstones and siltstones . as for the reservoir quality , the subaqueous ( subaerial ) distributary microfacies channel sandstones are the first , the channel - mouth bar microfacies sandstones come second , the distal bar microfacies sandstones is the third , and the last one is the interdistributary bay microfacies sandstones . the intense compaction , pressure solution and late carbonate cementation are responsible for the reduction of the porosity and permeability of the reservoir rocks 三角洲前緣水下分流河道、河口砂壩、遠砂壩及三角洲平原水上分流河道微相決定了儲集巖的發育，分布及原始物性條件；水下(上)分流河道微相砂體厚度大、物性和孔隙結構好，次之為河口砂壩微相砂體，遠砂壩微相砂體儲集性較差，而分流伺灣微相砂體物性和孔隙結構最差。
The variations in trace element contents and ratios may hold up a mirror to the lake - level fluctuations and climatic changes , which , in turn , have exerted a direct and important effect on the sequence stratigraphic development . collectively , the reservoir rocks from the yanchang formation consist dominantly of the delta front subfacies subaqueous distributary channel and channel - mouth bar microfacies and delta plain subfacies subaerial distributary channel microfacies fine - grained feldspar sandstones and siltstones . the reservoir rocks have been subjected to three stages of diagenetic and porosity evolution : ( 1 ) the porosity reduction by the mechanical compaction and chemical pressure solution during the early diagenetic stage ; ( 2 ) the porosity increase by the dissolution during the a substage of the late diagenetic stage , and ( 3 ) the porosity reduction by the cementation and filling during the b substage of the late diagenetic stage 系統的儲層特征研究表明，該區延長組儲層成因類型主要為三角洲前緣水下分流河道、河口砂壩及三角洲平原水上分流河道微相細粒長石砂巖、粉砂巖；儲層巖石經歷了壓實，膠結，溶蝕等成巖作用，歷經早成巖機械壓實和化學壓溶孔隙縮小期、晚成巖a亞期溶蝕作用孔隙擴大期及晚成巖a亞期( b亞期)膠結充填孔隙縮小期三個成巖-孔隙演化階段；儲層物性總體上具有較低孔滲、低孔滲的特點，孔隙類型主要為粒間溶孔、殘余粒間孔隙、粒內溶孔、晶間孔及晶間溶孔，裂縫不發育，儲集巖排驅壓力和中值壓力較高，孔隙結構類型以細小孔-微孔隙，微細喉-微喉型為主。
The yanchang formation is divided , for the first time , into six third - order sequences , each with an average time duration of about 4 . 5 ma . the single sequence is composed of deltaic and lacustrine sandstones , siltstones and mudstones . the subaerial and subaqueous distributary channel and channel - mouth bar sandstone reservoirs are well developed mainly in the lowstand and highland systems tracts 論文在富縣探區首次應用陸相層序地層學的觀點和方法，把延長組劃分為6個三級層序，平均時限4 . 5ma ，各層序由三角洲與湖泊相砂、泥巖沉積組成，主要在低位體系域和高位體系域發育水下(上)分流河道和河口砂壩砂巖儲層
The tree is an important subaerial object witch should be vividdly described and expressed in 3d gis . people have do some research about the tree model in 3d gis , but have n ' t got a perfect effect 樹木是3dgis中對現實環境進行逼真的描述和表達的一個重要地物。在gis領域，人們已經做過一些有關樹木模型的研究工作，但效果并不十分理想。
The - ray spectrometric survey of subaerial rocks in puziwan gold deposit and its geological significance 堡子灣金礦區基巖伽瑪能譜測量結果及其地質意義
Subaerial erosion occurs often with reduction to a peneplain . 陸上侵蝕常夷平成準平原。