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neogene n.【地質學;地理學】晚第三紀。

neogenesis

The study of neogene calcareous nannofossils from the pearl river mouth basin in the last two decades could be subdivided into two stages ( 1 ) from the beginning period of the 80 ' s to early of the last century , the studies focused on the calcareous nannofossil zones and the descriptions of main genera and species ; ( 2 ) from the middle and late period of the 90 ' s of the last century to the present , the researches concentrated on the high - resolution calcareous nannnofossil biostratigraphy 縱觀二十多年來珠江口盆地新近系鈣質超微化石的研究歷史,大致可分成兩個階段: ( 1 )上世紀80年代初至90年代初,側重于化石帶的報道及主要化石屬種的描述; ( 2 )上世紀90年代中后期至今,主要為高分辨率鈣質超微生物地層研究階段。

From the dongying formation ( ed ) to neogene , the shahejie formation was located in the late diagenetic stage a1 ~ a2 ; the oil and gas pools formed in a wide scale . at present the lower e2s3 , with overmatured source rocks and low porosity reservoir rocks , gets into the late diagenetic stage b - c in the northern qibei sag where is not favorable for petroleum accumulation , but the others of the shahejie formation are locate still in the late diagenetic stage a1 - a2 and propitious to form oil and gas pools based on the diagenetic numerical modeling under the condition of overpressure , we build a multiple unit cubic equation model for porosity prediction , as the result of the application of qibei sag , the prediction error is less than 2 % , and the precision excess that of foreign same model 歧北凹陷的模擬結果表明,在沙河街組沉積末沙河街組三段就進入晚成巖階段a _ 1期,油氣藏開始形成;在東營組沉積時期晚第三紀,沙河街組大部分地層處于晚成巖階段a _ 1 a _ 2期,生、儲、蓋層發育,是其主要成藏期;現今在歧北凹陷北部沙三段下部進入晚成巖階段b c期,儲層物性較差、不利于成藏,其他層段仍處于晚成巖階段a _ 1 a _ 2期,有利于油氣藏的形成。

The study results can be summerized as following aspects : ( 1 ) the basic settling curve of this basin was broken - line shape of seven sections in which upper jurassic , lower cretaceous , eocene , oligocene and neogene corresponded with the decline ones representing five episodic clear subsidences of this basin , late cretaceous to paleocene and early miocene corresponded with the rising ones reflecting the uplift and denudation of this basin . ( 2 ) the subsidence of this basin migrated from the east to the west , from mesozoic to cenozoic 研究表明: ( 1 )北黃海盆地的基本沉降曲線型式為7段折線狀,其中晚侏羅世、早白堊世、始新世、漸新世、新近紀為曲線下降段,代表盆地5幕較明顯的沉降;晚白堊世古新世以及中新世早期為曲線上升段,反映盆地的抬升剝蝕。

The regularity of accumulation distribution is ascertained and directs the exploration orientation . the main results obtained in this paper are : 1 . the analyses of hydrocarbon - bearing rock , reservoir , caprock and oil & gas reservoir indicate the source of oil & gas , the space for reservoir , requirement for preservation , reservoir type and its basic characters . 2 . it is realized by the analyses of sealing up capability of caprock and faults , and fault ' slatter stability from microcosmic and macroscopic that the wide - spread regional caprock of nm t prevented oil & gas of neogene from diffusing fault movement in neogene less violated and fault displacement decreased , which are advantageous for the preservation of oil & gas reservoir . and latter structure movement usually formed the accunulation of oil & gas in neogene . 3 . the research of history of hydrocarbon generation and expulsion of main hydrocarbon - bearing rock in qikou depression reveals the threshold depth and the fime of hydrocarbon generation and expulsion 項目研究取得了如下認識: 1 、對烴源巖、儲集層、蓋層及油氣藏展開分析,明確了歧口凹陷上第三系油氣藏的油氣來源、儲集場所、保存條件和油氣藏類型及其基本特征; 2 、從微觀和宏觀上對蓋層的封蓋能力以及斷層封堵和后期穩定性進行分析,認識到明下段區域蓋層的廣泛分布阻止了上第三系油氣藏的油氣逸散,同時上第三系斷層活動減弱,斷距較小,對油氣藏的保存較為有利。

( 5 ) according to the study on seismicic data , sedimentary characteristics , contact relations , incision relation of the faults and strata related to the folds which are associated with the faults , this paper reached the conclusions : the oblique - thrusting structure of sertengshan - xitieshan in northern qaidam basin was formed in middle jurassic and the left - thrusting fault zone was established in the late pliocene of neogene ( 5 )根據地震質料、沉積特征、地層的沉積接觸關系、斷裂切割地層關系以及與斷裂相關的褶皺卷入地層的研究,認為柴達木盆地北緣的賽什騰? ?錫鐵山逆沖推覆構造形成于中侏羅世,而左行逆沖斷裂帶定型于新第三紀上新世末。

The neogene is a key stage of terrestrial environmental evolution in yunnan . three stratigraphic sections including luhe ( late miocene ) , yangyi and longling ( late pliocene ) were selected to reconstruct vertical landscape of paleovegetation in these areas , based on palynological data . according to principle of the coexistence approach , seven quantitative paleoclimatic parameters of each deposit area were obtained by using meteorological data ( 1951 - 1980 ) of the distribution area of extant taxa found each palynoflora in china 晚第三紀是云南地區環境演變過程中的關鍵地質歷史時段,本論文以晚第三紀晚中新世(呂合) 、晚上新世(羊邑和龍陵)地層中的孢粉為研究對象,結合同層位大化石植物證據,參照現代植被,恢復了云南三個化石出產地區的古植被垂直分布景觀,并定性地描述了古氣候;同時運用共存分析方法( theco - existenceapproach )定量化地重建了三個地區的古氣候參數值;初步推測了沉積地可能的古海拔。

191 specimens of fossil woods collected from neogene sediments of yunnan province are studied . seven taxa are identified and described in details . among of them , three new species are established as ericaceoxylon longlingense , ericaceoxylon hymenanthesoides and vacciniaceoxylon vacciniumoides 本論文研究了我國云南龍陵大壩和鎮安、昌寧紅星晚上新世以及楚雄洲呂合晚中新世191個化石木標本,鑒定出7種化石木類型,其中越桔型木屬為新屬,越桔型木、常綠杜鵑型木和龍陵杜鵑型木為新種。

It is believed that three northeast - striking dextral slip fault zones , i . e . the baxian - shulu - handan fault zone , the huanghua - dezhou - dongming fault zone , and the linyi - huanghekou fault zone , are the result of the tectonic transform of paleogene extending to neogene - quaternary laterally slipping of north china plain rift systems , which extend along the central axis of rifts and accord with the quaternary centers of subsidence as the main seismic structures within the rifts 認為壩縣束鹿邯鄲斷裂帶、唐山河間磁縣斷裂帶和黃驊德州東明斷裂帶3條北東向右旋走滑斷裂帶為華北平原裂谷系從早第三紀伸展拉張作用進入晚第三紀第四紀走滑剪切拉張作用的產物,這3條斷裂帶分別位于3個北東向坳陷帶中部,并構成了第四紀沉降中心,與營口濰坊斷裂帶起構成華北平原內的主要強震構造。

Sxotf is recognized in the northern qaidam based on the analysis of structures of area . this oblique trusting fault zone with northwestern - southeastern trending consists of fault gouge , fault breccia and fault cleavage . fault hanging wall consists of sertengshan - xitieshan napple , which is distribution in dextral en echelon . fault footwall consists of youcangshan formation in neogene 本文在對賽什騰? ?錫鐵山斜沖斷裂詳細地段構造解析的基礎上,結合盆地的沉積特征、地球物理資料等對該斜沖斷裂的幾何學、運動學及形成時代進行了研究,論文著重探討了賽什騰? ?錫鐵山斜沖斷裂的地質意義。

4 . the types of of oil & gas are systematicly summarized . there are three basic type : first : lateral migration along layers with medium distance formed self - producing oil reservoir of neogene . second : migration along fault with short distance formed shallow oil reservoir . third : lateral migration along interlayer and unconformity with long distance 4 、系統總結了歧口凹陷油氣二次運移的三種基本方式:一是中距離沿層側向運移形成下第三系原生油藏;二是短距離沿斷裂通道運移,形成淺層油藏;三是長距離沿層間或不整合面的側向運移。

Situated at the both e w sides of pamir , the s w tarim and tadjik basins have the similar evolution history of tectono sedimentary processes during cenozoic , i . e . steady subsidence with transgressive sequence in paleogene and speedy subsidence with continental molassetype sediments in strong compressive tectonic environment in neogene - quaternery . since neogene , for the effect of pamir and west kunlun s northward moving and thrusting , there is complicated tectonostructural deformation taking place in tadjik and sw tarim . neogene stratigraphic combination and later structural deformation of tadjik basin and southwestern tarim much resemble each other in terms of extent of transpressional processes . paleogene in tadjik basin is main oil - bearing sequence and many substantial oil - gas fields there have been found . so , it can be assured in comparison that there is oil - gas perspective also in southwestern tarim region 第四紀受強烈擠壓快速沉降接受陸相磨拉石沉積。自新第三紀以來,受帕米爾西昆侖北移和隆升沖斷的影響,塔西南和塔吉克盆地發生了復雜的褶皺沖斷變形,其差異在于塔西南明顯地受走滑為主的剪壓構造作用,而塔吉克盆地是受擠壓為主的剪壓構造作用的影響。塔西南和塔吉克盆地下第三系巖相組合類似,后期構造變形也相似,塔吉克盆地下第三系是該盆地的主力油層,已有許多油氣田發現,因此可以推斷塔西南也應該有良好的油氣前景。

To reconstruct the evolution and variability of the east asian monsoon during the late cenozoic on millennial , orbital and tectonic time scales . 3 . to identify and better understand the links between tectonic uplift , erosion and weathering hemipelagic deposition , and climate change , including the evolution of the asian monsoon and the neogene global cooling Odp184航次1999年2月至4月間在中國南海進行鉆探取樣,通過鉆取半遠洋沉積,以期說明南海的新生代歷史,包括它的生物地層學、巖石地層學、年代學、古氣候學和古海洋學;重建千年級的晚新生代東亞季風的發展和演化、軌道和構造時間尺度;識別和更好地理解構造抬升、侵蝕和風化、半遠洋沉積和氣候變化,包括亞洲季風和晚第三紀的全球變冷。

For better understanding the influence of tectonic structural features in soil mass to subgrade of infrastructure , the author defined the faults , structural joints and structural fissures as neogene tectonic structural planes , and studied the features of the planes with the methods of systematic analysis 摘要為闡明土體中存在的構造形跡對工程建(構)筑物地基的影響,將土體中的斷層、構造節理和構造裂縫統稱為土體新近紀構造結構面,用系統分析方法對土體新近紀構造結構面特性進行了分析。

In this paper , the requirements of oil - bearing rock , reservoir and caprock , which formed the neogene reservoir in qikou depression are analyzed . the geological actions and process which are imperative and indispensable to form the reservoir in neogene , are systematicly studied 本文對歧口凹陷上第三系油氣藏形成的生儲蓋層條件進行分析,系統研究了形成上第三系油氣藏所必不可少又相互關聯的地質作用和過程,明確了其富集分布規律,指明了勘探方向。

In a word , the stress field variation since mesozoic can be divided into five periods such as indosinian epoch , early yanshan epoch ( j3 - k1 ) , end of yanshan epoch , eogene , neogene and quaternary , it is mainly affected by the active pattern of tanlu large fault 綜合研究認為,本區自中生代以來的應力場變化可分為印支期、早燕山期( j3 - k1 ) 、燕山末期、早第三紀、晚第三紀及第四紀五個階段,應力場的變化主要受郯廬大斷裂活動方式的影響。

7 . it is indicated the prospects for exploration are beidagang bueried - hill - drape - lik fold oil accumulation belt , baidong structure belt and chengbei fault step oil accumulation belt , which directs the explorations of neogene in qikou depression 7 、指出了有利的勘探區帶是北大港潛山?披覆背斜油氣聚集帶、白東構造帶和埕北斷階式油氣聚集帶,為歧口凹陷上第三系的勘探明確了實施方向。

The fossil birds of the early cenozoic ( paleogene - neogene ) are clearly attributable to the modern birds , and the earliest well - estabished record of most traditional orders and families of modern birds occur then 新生代早期(包括古近紀和新近紀)鳥類的分類已被清晰地歸入到現生鳥類中,并且現生鳥類傳統的“目” “科”類型在早期已經出現并確立。

The basin tectonic model : it is intermont basin during late jurassic to early cretaceous , developed into faulted - lacustrine basin in eogene , and evolved into depression in neogene and quaternary “盆地”構造發育模式為:從晚侏羅世到白堊紀末期發育的山間“盆地”開始、發展到早第三紀斷陷湖盆的發育、再演化為晚第三紀及第四紀地陷發育階段。

6 . the forming regularity of oil & gas reservoir of neogene in shallow ocean regions which are less explored in qikou depression are studied and are summaried into two models : one term + episodic type and ladder type 6 、對歧口凹陷低勘探程度區極淺海區上第三系油氣藏成藏規律進行研究,并將其歸結為一期成藏+幕式成藏和階梯式成藏兩種模式。