It indicated evidently tropical floristic remnant and affinity in the Alsophila spinulosa community. Comparing with the fossil flora from late Cretaceous and Tertiary (i.e. Northeast China flora, Fushun flora in Liaoning, Jinggu flora in Yunnan and Shanwang in Shandong) in China, pteridophyte flora of the Reserve was quite similar to that of late Cretaceous. Nevertheless, its spermatophyte flora was little similar to that of Tertiary, where angiosperm were booming in that period.

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New contributions of this work are as follows:(1). Preparation of Spherical MgCl_2-Supported Late-Transition Metal Catalysts for Ethylene PolymerizationFacile and effective immobilization of late-transition metal catalysts. 2,3-bis-(2,6-diisopropylphenyl) butane diimine nickel dibromide (1) and 2,6-bis-[1-(2,4,6-trimethylphenylimino)ethyl]pyridine iron dichloride (2), for ethylene polymerization has been achieved, using spherical MgCl_2 supports obtained by thermal dealcoholization of MgCl_2·2.56C_2H_5OH, and the effects of dealcoholization temperature on supported late-transition metal catalysts and the properties of resultant polymers were studied, the results indicated that:1.Supports with appropriate mechanical strength, high surface area and high porosity could be prepared by thermal dealcoholization of spherical MgCl_2·2.56C_2H_5OH supports; 2.BET, XRD, IR, SEM, GPC and DSC analyses indicate that the activities of the supported late-transition metal catalysts and the properties of resultant polymers are strongly dependent on the dealcoholization temperature.

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New contributions of this work are as follows:(1). Preparation of Spherical MgCl_2-Supported Late-Transition Metal Catalysts for Ethylene Polymerization Facile and effective immobilization of late-transition metal catalysts. 2,3-bis-(2,6-diisopropylphenyl) butane diimine nickel dibromide (1) and 2,6-bis-[1-(2,4,6-trimethylphenylimino)ethyl]pyridine iron dichloride (2), for ethylene polymerization has been achieved, using spherical MgCl_2 supports obtained by thermal dealcoholization of MgCl_2·2.56C_2H_5OH, and the effects of dealcoholization temperature on supported late-transition metal catalysts and the properties of resultant polymers were studied, the results indicated that: 1.Supports with appropriate mechanical strength, high surface area and high porosity could be prepared by thermal dealcoholization of spherical MgCl_2·2.56C_2H_5OH supports; 2.BET, XRD, IR, SEM, GPC and DSC analyses indicate that the activities of the supported late-transition metal catalysts and the properties of resultant polymers are strongly dependent on the dealcoholization temperature.

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The temperature of basin was influenced greatly by matle heat conduction, magmatic heat and radioelement decay during the time of Early Permian-Late Permian rifting, while in the down-warped basin from the late stage of Late Permian to the present the temperature has been greatly affected by geothermal gradient and tectogenetic transition heat.

認為早二疊世-晚二疊世早期裂谷作用階段盆地溫度主要受地幔熱傳導XXXXX欧美视频在线观看免费看、巖漿體熱和放射性元素衰變的影響久久网一区，晚二疊世晚期至今坳陷盆地階段主要受地熱增溫率和構造運動轉化熱的影響。

During early middle Jurassic period, Quemocuo formation in NQB was offshore lake deposition with marine feature, in SQB was shelf deposition, which indicted that an intense rifting and sea level rising with more large range, and consequently, eroding area was shrunk and deposition area was expanded.4. According to the result of stratigraphic surface features, division and correlation, and the paleographic characteristic, Qiangtang Basin during late Triassic -early middle Jurassic period could be divided into two basin developing stages with difficult tectonic nature, remnent epicontinental basin stage in Carian -early Norian of late Triassic and rifting basin stage in middle Norian of late Triassic - early middle Jurassic period respectively.

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This dissertation was focused on the research about the formation and evolution of NQB from the Late Triassic to the early middle Epoch of Jurassic Period, including integrated analyzing the characteristic of the key stratigraphic surfaces, the time of the key stratigraphy, regional rock straigraphy, biostratigraphy and chronostratigraphy, sedimentary system and depositional facies. On basis of these analysis, a tectonic evolution model have been established for NQB during from the Late Triassic to the early middle Epoch of Jurassic Period.1. After the systematic surface analysis about main stratigraphy units, we found that:(1) the bottom of Xiaochaka formation was comformity with the middle Triassic in the basin, and in the north margin it was deposited and overlapped on the different period stratigraphy before Triassic.(2) The top surface of Xiaochaka formation developed regionally karst and paleo-karst breccia, and was uncomformity with Nadigangri Formation, these things suggest that NQB in Xiaochaka depositing stage was developed from middle Triassic basin, and then an extensive regression occurred, the deposition was over and erosion come into being.(3) The lithologic assemblage, geochemistry, mixed fossils, and stratigraphy overlapping characteristic of Quemocuo Formation in early middle Jurassic indicted that the uncomformity surface was an extension-unconformity.2. Integrated analysis about stratigraphy division and correlation indicted that:(1) the paleontologic assemblage of Xiaochaka formation show its time was Carian -Norian stage of late Triassic. According to it was overlapped by late Triassic Nadigangri Formation, so Xiaochaka formation should be Carian - early Norian stage.(2) the SHRIMP Zircon U-Pb age of Nadigangri formation volcanic rocks wear vary form 216 to 205 Ma, so its time should be Norian, but maybe extended into Rhaetian Stage.(3) The age of its bottom volcanic rocks, the fossil assemblages of its middle and upper members and overlapped by lower Jurassic, indicted the age of Riganpeicuo Formation was Norian - Rhaetian stage. And the same time, the volcanic rocks geochemistry of Nadigangri and Riganpeicuo formation both reflected that they wear formed in rift tectonic settings. The lower lithologic and surface characteristic, fossil assemblages and its upper maybe was conformity with lower Jurassic, all reflected that the age of Tumengela Formation in Tumen area should be Norian - Rhaetian stage.

論文對晚三疊世—中侏羅世早期盆地的形成與演化開展了研究美日韩免費黄片，包括關鍵地層界面特征分析亚洲一区精品黄、關鍵地層時代歸屬分析、區(qū)域巖石地層a级视频免费播放、生物地層和年代地層的綜合對比分析欧美性爱在线播放久草、區(qū)域沉積體系與沉積相分析、巖相古地理分析国产色色色视频网站，最終建立晚三疊世—中侏羅世早期羌塘盆沉積—構造動力演化模式亚洲一级av无码毛片精品。1、系統(tǒng)的對各地層單元的界面分析發(fā)現(xiàn)：(1)肖茶卡組底界在盆地內部與中三疊統(tǒng)整合關系美女一级A片免费视频在线观看，在盆地北緣為沉積超覆于不同時代的前三疊系之上：(2)肖茶卡組頂界面發(fā)育古巖溶角礫巖黄色AⅤ，與上覆那底崗日組為巖溶不整合接觸，說明肖茶卡組沉積時期的羌塘盆地是在早中三疊世的盆地基礎發(fā)展起來的插下面的视频，后期出現(xiàn)了廣泛的海退事件18岁网站。，使盆地結束沉積并遭受風化剝蝕作用；(3)中侏羅統(tǒng)雀莫錯組的巖性組合特征、巖石化學特征久久国产综合精品久久国产、古生物化石混積和地層的沉積超覆現(xiàn)象均表現(xiàn)出裂陷環(huán)境下形成的伸展不整合面的特征亚洲国产精品一区二区玖玖爱。2、綜合地層劃分與對比分析認為：(1)肖茶卡組古生物化石組合反映其時代為晚三疊世卡尼期—若利期xx69欧美，根據(jù)其上被上三疊統(tǒng)那底崗日組不整合覆蓋图片区自拍偷拍，將其時代厘定為卡尼期—若利期早期；(2)那底崗日組火山巖SHRIMP鋯石U-Pb年齡在216～205 Ma之間操来操去网站，其時代主要為若利期，可能包含有瑞替期：(3)日干配錯組底部火山巖的年齡欧美孕妇与黑人孕交4p、中上部化石組合及其被下侏羅統(tǒng)整合覆蓋久久精品视频里只有精品，綜合反映的時代為晚三疊世若利期—瑞替期，而且那底崗日組火山巖和日干配錯組火山巖的地球化學成分分析反映兩者均為引張構造背景下的產物免费黄色网站有；土門地區(qū)的土門各拉組的下部巖性及界面特征XXXX性欧美极品V、化石組合和上部可能被下侏羅統(tǒng)整合覆蓋，綜合反映其時代為若利期—若利期日本在线中文字幕播放。

Studies show that regional granitoid of late Triassic, late Jurassic, middle period of early Cretaceous and late period of e arly Cretaceous were formed successively in different stages of interactions of the Yangtze Plate, the North China Craton and the Pacific plate.

研究認為超级超碰，膠東地區(qū)晚三疊世(230～200Ma)、晚侏羅世(160～140Ma)欧美人与动性行为高清视频、早白堊世中期(130～125Ma)玖玖玖玖玖无码、早白堊世晚期(120～100Ma)花崗質巖石可以與揚子板塊、華北板塊午夜中文不卡理伦片、太平洋板塊相互作用的不同階段相對應一区黄色片A级。

By comprehensive analysis of the characteristics of formation and reconstruction, six tectonic belts in the northeast part of Junggar basin were divided: marginal obduction zone in Early Paleozoic(O1-2)?melange mag-ma collision zone of late Paleozoic (D1), volcanic arc-compression zone of Late Paleozoic (D1), back-arc folded belt of Late Paleozoic (D2_3), marginal depression folded belt of Late Paleozoic (C1-P2) and foreland basin gentle anticline belt of Mesozioc era, etc.

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In the scorch stage, average yield of withered grass of second and third year growth prematurity type of Phleum pratense L. is 10672.5 kg/hm2, by cradling one time per year, average yield of wind hay grass is 7575 kg/hm2, the plant average height of selective colony is 160.0cm, the plant height of colony is rather equality. In the course of general nutrition composition analysis, discover that nutrition value of late-maturity type is higher than nutrition value ofprematurity type, coarse fibre and coarse protein and coarse fat of late-maturity type are 10.7%, 3.58%, 24.82% respectively, coarse fibre and coarse protein and coarse fat of prematurity type are 9.84%, 2.61%, 27.59% respectively, dry matter content of prematurity type is 92.63%, dry matter content of late-maturity type is 92.22%.

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The change of REE composition between the upper and lower samples from Hongcan well implied the tectonic setting and property of the sediment provenance in Zoige Basin were altered obviously between late-period of Middle Triassic and mid-period or late-period of Late Triassic. This change was probably due to elevation and erosion of the matured continental crust on the east of Zoige Basin, and lots of clastic materials transported into the basin in late-period of Late Triassic.

通過對比雜砂巖稀土元素組成在上層和下層樣品之間的變化，若爾蓋盆地內中三疊世中期到晚三疊世中期及晚期沉積物源區(qū)的構造背景和性質發(fā)生了明顯的改變人人色人人爱爱，而這一變化很可能是盆地東側成熟陸殼在晚三疊世后期被抬升和剝蝕超碰在线wwww，其大量碎屑物質被帶到盆地的結果。