首先讨论了基于自适应四叉树实现LOD的一般方法，详细探讨了模型连接的三角扇绘制法；
First, the authors discussed the general method of LOD based on adaptive quad-tree and described the triangle-fan method for model drawing;
扇三角洲沉积体明显地可划分为：扇三角洲平原亚相、扇三角洲前缘亚相和前扇三角洲亚相。
The fan deltaic body can be divided into three subfacies, named fan delta plain, fan delta front and pro-fan delta.
该区北部形成纵向三角洲，东部形成扇三角洲，西部形成斜坡前积复合体。
Longitudinal delta is developed in the north, fan-delta in the east, and slope progradation complex in the west.
由于泥沙的沉积，河床抬升，水深变小，水流速度场在整个堆积扇上明显增大，并在三角洲前缘出现明显的绕岛环流和河流分叉现象。
The water depth reduced due to deposition, the water flow velocity upon the alluvial sector increased obviously and at the front of the delta exists currents around the sand bar.
该三角洲复合体由100多个沉积单元组成。每一个扇三角洲单元，可分出平原相，前缘相。
The delta complex is composed of over100sedimentary units each of which can be divided into a plain facies and a frontier facies.
得出的结论是：双阳盆地长岭区煤系地层沉积环境主要为扇三角洲沉积和湖泊沼泽沉积。
The conclusion is that the sedimentary environment of coal measures in Changyang area, Shuangyang basin is mainly fan delta and limnetic deposits.
扇三角洲砂体的沉积特征与碎屑供应、古地貌和沉积环境密切相关。
Character of fan delta sand body is confined by sediments resource, sedimentary landform, and sedimentary environment, etc.
不同类型的扇三角洲沉积可发育在断陷盆地演化的不同阶段。
Various types of fan delta systems have been developed in different evolution stages of faulted basin.
主要沉积体系为河流、三角洲、冲积扇及滨浅湖相。
The main sedimentary system includes fluvial, delta, alluvial fan and lake facies.
正演模拟结果表明在时间剖面上解释的地震特征具有扇三角洲浊积岩的速度结构。
Forward modelling result indicates that seismic characteristic explained in time-section has velocity structure of fan delta-turbidite.
发育的沉积相类型有冲积扇相、河流相、湖漫相、湖泊相、扇三角洲相、三角洲相、湖底扇相和火山岩相。
The sedimentary facies developed mainly include alluvial fan, fluvial, lake flat, lacustrine, fan delta, delta, lake-floor fan and volcanic rocks.
吐鲁番坳陷北部七克台组发育扇三角洲沉积。
Fan delta sediments developed well in the northern area of Turpan Depression.
基准面下降，展布范围增大，并出现新的扇三角洲朵体。
When the base level descends, range of distribution increases and new fan-delta lobes appear.
沉积相可分冲积扇相、扇三角洲相、湖泊相、河流相和沼泽相。
The sedimentary facies can be classified into alluvial fan, fan delta, lake, stream and swamp.
结果表明：该区下白垩统主要发育冲积扇、扇三角洲、水下扇、三角洲、河道、湖泊等多种沉积体系及火山岩体。
The result shows that, this area develops several sedimentation systems including alluvial fan, fan delta, subsea apron, delta, channel and lake and volcanic rock body.
措勤盆地唢呐湖组以陆湖泊相为主，划分为扇三角洲、滨湖相和浅湖相。
The Cuoqin basin Suonahu Formation is lacustrine facies and been divided into fan-delta and shallow lagoon facies.
沉积相总体特征以滨浅湖沉积为主，而在研究区周缘则多发育河流泛滥平原、三角洲和扇三角洲沉积。
The general sedimentary characteristics indicate that shore-shallow lacustrine deposits are the main types, while flood plain, delta and fan delta occurred mainly along the basin margin.
分流河道沉积的碎屑岩复合体在扇三角洲和辫状河三角洲沉积中非常发育，是其沉积主体。
Clastic rock compounds as a main sedimentation body deposited by means of distributary channel sediments are well developed in the sedimentation of the fan delta and braided channel delta.
充分利用密闭取心、密井网等资料，精细剖析了双河油田扇三角洲前缘储层沉积微相及其分布。
The microfacies and their distributions of fan delta front in Shuanghe oil field are analyzed in detail by using sealed coring data, highly dense well patterns and so on.
老爷庙地区东营组主要发育有扇三角洲、湖泊三角洲、近岸水下扇、水下重力流和湖泊等沉积体系。
The Dongying Formation in Laoyemiao region consists of fan delta, lake delta, neritic subaqueous fan and subaqueous gravity flow and lake depositional systems.
扇三角洲前缘水下分流河道形成的碎屑岩体是扇三角洲沉积的主体部分，成为主要的油气储集体。
The subaqueous distributary channel clastic rock bodies in the fan delta front formed the main part of the fan delta and the most important oil and gas reservoirs.
高水位体系域主要由滨浅湖沉积体系、扇三角洲沉积体系和浊积扇沉积体系组成。
High stand system tract is composed of coast and shallow lake sedimentary system, fan delta sedimentary system and turbidite fan sedimentary system.
确定研究区沙三段主要发育有辫状三角洲、近岸水下扇、滑塌浊积扇等几种沉积相类型；
There are three main types of sedimentary facies: braided-river delta, slip turbidite fan, near-bank submerged alluvial fan.
吐哈盆地侏罗系广泛发有冲积扇、河流、湖泊、扇三角洲、辫状河三角洲及曲流河三角洲相沉积。
Alluvial fan, fluvial, lake, fan delta, braid river delta and meandering river delta facies sediments are widely developed in Jurassic in Turpan-Hami basin.
吐哈盆地侏罗系广泛发有冲积扇、河流、湖泊、扇三角洲、辫状河三角洲及曲流河三角洲相沉积。
Alluvial fan, fluvial, lake, fan delta, braid river delta and meandering river delta facies sediments are widely developed in Jurassic in Turpan-Hami basin.
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