Depositional Environment of the Tertiary Fenghuoshan Group in the Hoh Xil Basin, Northern Tibetan Plateau
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摘要: 青藏高原北部的可可西里盆地是高原腹地最大的第三纪沉积盆地,分布着沉积厚度达 4 782.8m的早始新世—早渐新世风火山群灰紫色砂岩、泥岩和砾岩,其沉积环境演化经历了四个阶段,从早期 56.0~ 52.2Ma河流为主的环境,到中期 52.2~ 4 3.1Ma的湖泊环境和 4 3.1~ 3 8.3Ma的河流与扇三角洲环境,演变到晚期 3 8.3~ 3 2.0Ma河流为主的环境。古水流方向也由北东向变为南东向,到晚期又转变为北向为主,反映盆地沉积中心逐渐向东向北迁移。这种沉积环境演化和盆地沉积中心迁移可能受青藏高原早期隆升的影响.Abstract: Fcnghuoshan Group, with total thickness up to 4 782.8 m and geologic age from Earlv Eoccnc to Earlv oligocene, is widclv distributed in the Hoh Xil hasin, which is the largest Tcrtiarv scdimcntarv basin in the hinterland of the Tibetan plateau.The pile of sediments consists of gray-violet sandstone mudstonc and conglomerate.The evolution of dcpositional environment has undergone four periods: mainly fluvial environment during 56.0-52.2 Ma, lacustrinc environment during 52.2-43.1 Ma, fluvial and fan-delta environments during 43.1-38.3 Ma}~and mainly fluvial environment during 38.3 -32.0 Ma.Palcocurrcnt directions were changed to castsouthward from castnorthward in the early period then to north-ward in the late period.Thcsc changes indicate the dcpoccntcr of the Hoh Xil basin migrated eastward and northward. The evolution of the dcpositional environment and migration of the dcpoccntcr could he affected by early uplift of the Tibetan plateau
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Key words:
- depositional environment /
- Fenghuoshan Group /
- Tertiary /
- Hoh Xil basin /
- Tibetan plateau
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[1] 1 李吉均,文世宣,张青松等. 青藏高原隆起的时代、幅度和形式的探 讨[J]. 中国科学,1979,6:608 ~ 616
2 Ruddiman W F and Kutzbach J E. PIateau upIift and cIimatic change[J]. Scientific American,1991,264:66 ~ 75
3 Ruddiman W F,Raymo M E,PreII W L,et aI. The upIift-cIimate connection:A synthesis[A]. In:Ruddiman W F. Tectonic upIift and cIimate change[C]. New York and London:PIenum Press,1997. 471 ~ 515
4 李吉均. 青藏高原隆升与环境研究的回顾与争议[A]. 见:施雅风,李吉均,李炳元. 青藏高原晚新生代隆升与环境变化[C]. 广东:广东科技出版社,1998. 1 ~ 16
5 汪品先. 亚洲形变与全球变冷———探索气候与构造的关系[J]. 第四纪研究,1998,3:213 ~ 221
6 CopeIand P. The when and where of the growth of the HimaIaya and the Tibetan pIateau[A]. In:Ruddiman W F,de. Tectonic upIift and cIimate change[C]. New York and London:PIenum Press,1997. 19 ~ 40
7 刘志飞. 青藏高原腹地第三纪沉积与高原隆升的关系:[学位论文][D]. 成都:成都理工学院,1999
8 Wang C S,Liu Z F,Zhao X,et aI. SedimentoIogy of the Fenghuoshan Group in the Hoh XiI basin,northern Oinghai-Tibet pIateau:ImpIication for the pIateau upIift history. In: Universities of Potsdam, T bingen and W rzburg. The 14th HimaIaya-Karakorum-Tibet Workshop[C]. KIoster EttaI:Terra Nostra,1999. 166 ~ 167
9 尹集祥,徐均涛,刘成杰等. 拉萨至格尔木的区域地层[A]. 见:中英青藏高原综合地质考察队. 青藏高原地质演化[C]. 北京:科学出版社,1990. 1 ~ 48
10 张以弗,郑健康. 青海可可西里及邻区地质概论[M]. 北京:地震出版社,1994. 40 ~ 44,177
11 Liu Z F,Zhao X,Wang C S,et aI.Magnetostratigraphy of Tertiary sediments from the Hoh XiI basin:ImpIications for the Cenozoic tectonic history of the Tibetan pIateau[J].Geophys J Int,2 000(in revision)
12 HarIand W B,Armstrong R L,CoX A V,et aI. A geoIogic time scaIe 1989[R]. Cambridge:Cambridge Univ. Press,1990. 263
13 青海省地质矿产局. 青海省区域地质志[M]. 北京:地质出版社,1991. 662
14 Liu Z F and Wang C S. OiI shaIe in the Tertiary Hoh XiI basin,northern Oinghai-Tibet pIateau[J]. Am Assoc Pet GeoI BuII,1999,83:1 890
15 Coward W P,Kidd W S F,潘耘等. 拉萨至格尔木的构造[A]. 见:中英青藏高原综合地质考察队. 青藏高原地质演化[C]. 北京:科学出版社,1990. 321 ~ 347
16 MiaII A D. Lithofacies types and verticaI profiIe modeIs in braided river deposits:a summary[A]. In:MiaII A D. FIuviaI SedimentoIogy[C]. Can Soc Petro GeoI Mem 5,1978. 597 ~ 604
17 MiaII A D. PrincipIes of sedimentary basin anaIysis[M]. New York:Springer-VerIag,1984. 668
18 Chung S,Lo C,Lee T,et al. Diachronous upIift of the Tibetan pIateau starting 40 Myr ago[J]. Nature,1998,394:769 ~ 773
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