echelon n. 1.【軍事】梯隊(duì),梯陣;梯列。 2.組織系統(tǒng)中的等級(jí),指揮階層;(負(fù)有特殊責(zé)任而占據(jù)同一等級(jí)的)集團(tuán)。 3.特勤部隊(duì)。 4.【物理學(xué)】階層光柵。 fly in echelon 梯隊(duì)飛行。 a rear echelon 后方梯隊(duì)。 in a higher echelon 在高級(jí)指揮階層。 a maintain echelon 后勤保養(yǎng)隊(duì)。 vt. 使成梯隊(duì)。 an army echeloned along the road 沿公路排成梯隊(duì)的大軍。 vi. 排成梯隊(duì)。
Sliding structures are recognized appling multiple ways , and they occur in sections in the shape of flowers . the main sliding fault has the characteristics of straightness and sectionality in plane view . in the main displacement belt or its adjacent areas , an echelon faults and an echelon folds appeared 應(yīng)用多種標(biāo)志識(shí)別走滑構(gòu)造,主要表現(xiàn)為剖面上出現(xiàn)花狀構(gòu)造,主走滑斷層平面上呈平直狀和分段性,在主位移帶內(nèi)或其毗鄰地區(qū)出現(xiàn)雁列斷層及雁列褶皺,在主干斷裂帶兩側(cè)的褶皺構(gòu)造可見(jiàn)火山巖體被錯(cuò)開(kāi),位移2 4km ,在鉆井巖心樣品中見(jiàn)到明顯的走滑構(gòu)造運(yùn)動(dòng)形跡。
The basin - formed mechanism , evolution model and petroliferous geological features of compresso - shear basins in the world are analyzed , by which six aspects of the features are summarized as follows : 1 ) in the compresso - shear process , the sedimentary speed of basin is high , forming thicker coarse - grained clastic rocks which normally shape good petroleum reservoir ; 2 ) the source rocks of basin tend to coming from the organic matter - enriched rocks formed in pre - compresso - shear stages , except that in intense compresso - shear process , deep water - semi deep water source rocks are possibly developed in pre - compresso - shear stages , e4xcept that in intense compresso - shear process , deep water - semi deep water source rocks are possibly developed in frontal of deep depression ( fore deep ) of thrust belt ; 3 ) the en echelon folds ( including anticline and fault - nose structure ) are generally as good oil traps ; 4 ) the compresso - shear process is helpful to hydrocarbon accumulation ; 5 ) it may promote the maturity and hydrocarbon - generating process of organic matte , and 6 ) the thrust belts in the surrounding areas of compresso - shear basin are favorable are favorable domains for petroleum concentration 摘要通過(guò)對(duì)世界上壓扭性盆地的成盆機(jī)制、演化模式和油氣地質(zhì)特點(diǎn)分析,總結(jié)壓扭性盆地具有6個(gè)方面的石油地質(zhì)特征:壓扭作用期間盆地的沉積速率較高,一般形成較厚的粗碎屑沉積,它們常構(gòu)成很好的油氣儲(chǔ)集層:盆地的烴源巖往住來(lái)自于前壓扭期砂成的富含有機(jī)質(zhì)的巖石,但在強(qiáng)烈的壓扭作用期間,在沖斷帶的前緣深坳陷(前淵)中有可能發(fā)育深水半深水相的烴源巖;壓扭(張扭)作用期間形成的雁行式褶皺(包括背斜和斷鼻等)往住是很好的油氣圈閉;壓扭作用易于成藏;壓扭作用可以促進(jìn)有機(jī)質(zhì)的成熟生烴作用;壓扭性盆地的周邊沖斷帶是油氣賦存的有利部位。