Sedimentary Environment of Tertiary Recorded in the Yongdeng Section of Lanzhou Basin

YUE Le ping; QIU Zhan xiang; XIE Guang pu; QIU Zhu ding; ZHANG Li; ZHANG Yun xiang; Heller F

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Article Navigation > Acta Sedimentologica Sinica > 2003 > 21(4): 683-687

YUE Le ping, QIU Zhan xiang, XIE Guang pu, QIU Zhu ding, ZHANG Li, ZHANG Yun xiang, Heller F. Sedimentary Environment of Tertiary Recorded in the Yongdeng Section of Lanzhou Basin[J]. Acta Sedimentologica Sinica, 2003, 21(4): 683-687.

Citation:

Sedimentary Environment of Tertiary Recorded in the Yongdeng Section of Lanzhou Basin

1.
Geology Department of Northwest University,Key laboratory for Continental Dynamics of Ministry Education,Xi'an 710069;
2.
State Key Laboratory of Loess and Quaternary Geology,Insitute of Earth Environment,Chinese Academy of Sciences,Xi'an 710075;
3.
Institute of Vertebrate Paleontology and Paleoanthropology,Chinese Academy of Sciences,Beijing 100044;
4.
Natual Museum of Lanhou,Lanzhou 730050;
5.
Guangzhou Institute of Geochemistry,Chinese Academy of Sciences,Guangzhou 510640;
6.
Institute of Gephisice,ETH.Honggerberg,CH 8093,Zurich,Switzerland

Received Date: 2002-10-14
Rev Recd Date: 2003-03-21
Publish Date: 2003-12-10

Abstract

With the result of chronological research, sedimentology has been used to study the Tertiary sediments of Yongdeng Section of Lanzhou Basin and analyzed the changes of sedimentary environment and climate since Cenozoic.A set of fan delta deposits formed from the late Paleocene to early Eocene is red sandstone with crossstratification.The age of upper layers is about 51Ma.Great environmental changes took place in Lanzhou area at 51MaB.P.,which led to the climate transformation from warm and humid to semiarid and serihumid and climate was characterized by hot.Lake bed changed from freshw ater to salty, which implied the diversion toward north of arid zone controlled by semit ropical high-pressure belt.Lanzhou area became arid zone controlled by planetary wind system.The basin had a stage from slig ht saline-lake to salt-lake(Yiehusheng Formation)within the interval of about 20Ma(from late early Eocene to early early Oligocene(51 ～ 31.5Ma)), sand-mud stone contains plenty of interbeds of gypsum.The area was converting to moist climate in early Oligocene.Lanzhou Basin changed from saltwater lake to fresh lake,which probably indicates gradual formation of southeast monsoon.Mainland of China has been cont rolled by the monsoon instead of planetary wind system befo re.East-westward arid zone disappeared in early period and north-westward arid zone appeared.The area became moist comparing to before.Having endured three great cycles of sedimentation from the middle early Oligocene to middle Miocene (31.5 ～ 15Ma), the basinhad died gradually.The three cycles are respectively composed of sandstone of river facies —sand-mud stone of shore facies of light saline-lake, sandstone of river facies —sand-mud stone of shore facies of freshlake —mudstone of marsh facies and valley plain facies, sandstone of river facies—mudstone of marsh facies and valley plain facies.Plenty of the sediments of sand and gravel deposited in the basin at 20MaB.P., which reflects fast uplift of surrounding mountain mass and consequent degradation and implied that uplift of Qing hai-Tibean Plateau had influence on Lanzhou area.
- sedimentary environment,
- enviro nment of palaeoclimate,
- Lanzhou Basin,
- Tertiary

References

[1]	邱占祥,谷祖纲.甘肃兰州-第三纪中期哺乳动物化石地点[J].古脊椎动物学报,1988, 26(3):198～213[Qiu Zhanxiang,Gu Zugang. A new locality yielding Mid-Tertiary mammals near Lanzhou, Gansu[J].Vertebrata Palasiatica, 1988, 26(3): 198～213]
[2]	邱占祥,谢骏义,阎德发.甘肃东乡几种早中新世化石地点[J].古脊椎动物学报,1990,28(1):9～24[Qiu Zhanxiang, Xie Junyi, Yan Defa. Discovery of some Early Miocene Mammalian fossils from Dongxiang, Gansu[J]. Vertebrata Palasiatica, 1990, 28(1): 9～24]
[3]	Qiu Zhanxiang,Wangbanyue,Qiuzhuding. Land mammal geochronology and magnetostratigraphy of Mid-Tertiary deposits in the Lanzhou Basin,Gansu Province,China[J]. Eclogae Geology Helv, 2001, 94: 373～385
[4]	李吉均,方小敏.青藏高原隆起与环境变化研究[J].科学通报,1998,43(15):1 569～1 574[Li Jijun, Fang Xiaomin. Uplift of the Tibetan Plateau and the environmental changes[J]. Chinese Science Bulletin, 1999, 44(23):2117
[5]	方小敏,李吉均,朱俊杰,等.甘肃临夏盆地新生代地层年代测定与划分[J].科学通报,1997,42(14):1 457～1 471[Fang Xiaomin, Li jijun, Zhu Junjie, et al . Absolute dating and classification of Cenozoic deposits of the Linxia Basin, Gansu[J]. Chinese Science Bulletin, 1997, 42(14): 1457]
[6]	谷祖纲,王四海,黄钊文,等. 临夏盆地第三系年代地层学研究与Giraffokeryx在中国的发现[J].科学通报,1995,40(5):440～420[Gu Zugang, Wang Sihai, Huang Zhaowen,et al. Discovery of Giraffokeryx in China and the Tertiary chronostratigraphy of Linxia, Gansu Province[J]. Chinese Science Bulletin, 1995, 40(9):758]
[7]	宋春辉,孙淑荣,方小敏,等.酒西盆地晚新生代沉积物重矿物分析及沉积演化[J].沉积学报,2002,20(4)552～559[Song C H, Sun S R, Fang X M,et al. Analysis of tectonic uplift and heavy minerals of sediments on Jiuxi Basin in the northern margin of Tibetan Plateau since the Late Cenozoic[J]. Acta Sedimentologica Sinica, 2002,20(4)552～559]
[8]	黄华芳,彭作林,卢伟,等. 酒西盆地、酒东盆地第三系磁性地层的划分与对比[J]. 甘肃地质,1993,2(1): 6～16[Huang H F, Peng Z L, Lu W, et al.Paleomagnetic division and comparison of the Tertiary in Jiuxi and Jiudong Basins[J]. Acta Geologica Gansu,1993, 2(1):6～16]
[9]	岳乐平,Heller F,邱占祥,等. 兰州盆地第三系磁性地层年代与古环境记录[J].科学通报,2000, 45(18):1 998～2 002[Yue Leping, Heller F, Qiu Zhanxiang. Magnetostratigraphy and paleoenvironmental record of Tertiary deposits of Lanzhou Basin[J].Chinese Science Bulletin,2000,45(18):1 998～2 002]
[10]	Reading. Sedimentary environment and facies. 2nd[M]. London: Blackwell, 1986
[11]	Mial Andrew D.Lithofacies types and vertical profile models in braided river deposits(A Summary)[A]. In: Fluvial Sedimentology[C].Canada Calagary,Alberta. 1978.597～604
[12]	王苏民. 世界咸水湖的物理与化学特征[J].湖泊科学,1993,5(3):278～286[Wang Sumin. Physics and chemistry of saline lakes[J]. Journal of Lakes Sciences, 1993, 5(3): 278～286]
[13]	刘东生,郑绵平,郭正堂. 亚洲季风的起源和发展及其与两极冰盖和区域构造运动的时代偶合性[J]. 第四纪研究,1998,(3):194～204[Liu Dongsheng, Zheng Mianping, Guo Zhengtang. Initiation and evolution of the Asia Monsoon System timely coupled with the ice-sheet growth and the tectonic movements in Asia[J]. Quaternary Science, 1998, (3): 194～204]
[14]	钟大赉,丁林. 青藏高原隆升过程及其机制的探讨[J].中国科学(D辑),1996,26(4):289～295[Zhong Dalai, Ding Lin. Rising process of the Qinghai-Xizang(Tibet) Plateau and its mechanism[J]. Science in China( Series D),1996, 39(4):369]

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通讯作者: 陈斌, bchen63@163.com

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沈阳化工大学材料科学与工程学院沈阳 110142

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Sedimentary Environment of Tertiary Recorded in the Yongdeng Section of Lanzhou Basin

1. Geology Department of Northwest University,Key laboratory for Continental Dynamics of Ministry Education,Xi'an 710069;

2. State Key Laboratory of Loess and Quaternary Geology,Insitute of Earth Environment,Chinese Academy of Sciences,Xi'an 710075;

3. Institute of Vertebrate Paleontology and Paleoanthropology,Chinese Academy of Sciences,Beijing 100044;

4. Natual Museum of Lanhou,Lanzhou 730050;

5. Guangzhou Institute of Geochemistry,Chinese Academy of Sciences,Guangzhou 510640;

6. Institute of Gephisice,ETH.Honggerberg,CH 8093,Zurich,Switzerland

Received Date: 2002-10-14

Rev Recd Date: 2003-03-21

Publish Date: 2003-12-10

Key words:

Abstract: With the result of chronological research, sedimentology has been used to study the Tertiary sediments of Yongdeng Section of Lanzhou Basin and analyzed the changes of sedimentary environment and climate since Cenozoic.A set of fan delta deposits formed from the late Paleocene to early Eocene is red sandstone with crossstratification.The age of upper layers is about 51Ma.Great environmental changes took place in Lanzhou area at 51MaB.P.,which led to the climate transformation from warm and humid to semiarid and serihumid and climate was characterized by hot.Lake bed changed from freshw ater to salty, which implied the diversion toward north of arid zone controlled by semit ropical high-pressure belt.Lanzhou area became arid zone controlled by planetary wind system.The basin had a stage from slig ht saline-lake to salt-lake(Yiehusheng Formation)within the interval of about 20Ma(from late early Eocene to early early Oligocene(51 ～ 31.5Ma)), sand-mud stone contains plenty of interbeds of gypsum.The area was converting to moist climate in early Oligocene.Lanzhou Basin changed from saltwater lake to fresh lake,which probably indicates gradual formation of southeast monsoon.Mainland of China has been cont rolled by the monsoon instead of planetary wind system befo re.East-westward arid zone disappeared in early period and north-westward arid zone appeared.The area became moist comparing to before.Having endured three great cycles of sedimentation from the middle early Oligocene to middle Miocene (31.5 ～ 15Ma), the basinhad died gradually.The three cycles are respectively composed of sandstone of river facies —sand-mud stone of shore facies of light saline-lake, sandstone of river facies —sand-mud stone of shore facies of freshlake —mudstone of marsh facies and valley plain facies, sandstone of river facies—mudstone of marsh facies and valley plain facies.Plenty of the sediments of sand and gravel deposited in the basin at 20MaB.P., which reflects fast uplift of surrounding mountain mass and consequent degradation and implied that uplift of Qing hai-Tibean Plateau had influence on Lanzhou area.

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Reference (14)

[1]	邱占祥,谷祖纲.甘肃兰州-第三纪中期哺乳动物化石地点[J].古脊椎动物学报,1988, 26(3):198～213[Qiu Zhanxiang,Gu Zugang. A new locality yielding Mid-Tertiary mammals near Lanzhou, Gansu[J].Vertebrata Palasiatica, 1988, 26(3): 198～213]
[2]	邱占祥,谢骏义,阎德发.甘肃东乡几种早中新世化石地点[J].古脊椎动物学报,1990,28(1):9～24[Qiu Zhanxiang, Xie Junyi, Yan Defa. Discovery of some Early Miocene Mammalian fossils from Dongxiang, Gansu[J]. Vertebrata Palasiatica, 1990, 28(1): 9～24]
[3]	Qiu Zhanxiang,Wangbanyue,Qiuzhuding. Land mammal geochronology and magnetostratigraphy of Mid-Tertiary deposits in the Lanzhou Basin,Gansu Province,China[J]. Eclogae Geology Helv, 2001, 94: 373～385
[4]	李吉均,方小敏.青藏高原隆起与环境变化研究[J].科学通报,1998,43(15):1 569～1 574[Li Jijun, Fang Xiaomin. Uplift of the Tibetan Plateau and the environmental changes[J]. Chinese Science Bulletin, 1999, 44(23):2117
[5]	方小敏,李吉均,朱俊杰,等.甘肃临夏盆地新生代地层年代测定与划分[J].科学通报,1997,42(14):1 457～1 471[Fang Xiaomin, Li jijun, Zhu Junjie, et al . Absolute dating and classification of Cenozoic deposits of the Linxia Basin, Gansu[J]. Chinese Science Bulletin, 1997, 42(14): 1457]
[6]	谷祖纲,王四海,黄钊文,等. 临夏盆地第三系年代地层学研究与Giraffokeryx在中国的发现[J].科学通报,1995,40(5):440～420[Gu Zugang, Wang Sihai, Huang Zhaowen,et al. Discovery of Giraffokeryx in China and the Tertiary chronostratigraphy of Linxia, Gansu Province[J]. Chinese Science Bulletin, 1995, 40(9):758]
[7]	宋春辉,孙淑荣,方小敏,等.酒西盆地晚新生代沉积物重矿物分析及沉积演化[J].沉积学报,2002,20(4)552～559[Song C H, Sun S R, Fang X M,et al. Analysis of tectonic uplift and heavy minerals of sediments on Jiuxi Basin in the northern margin of Tibetan Plateau since the Late Cenozoic[J]. Acta Sedimentologica Sinica, 2002,20(4)552～559]
[8]	黄华芳,彭作林,卢伟,等. 酒西盆地、酒东盆地第三系磁性地层的划分与对比[J]. 甘肃地质,1993,2(1): 6～16[Huang H F, Peng Z L, Lu W, et al.Paleomagnetic division and comparison of the Tertiary in Jiuxi and Jiudong Basins[J]. Acta Geologica Gansu,1993, 2(1):6～16]
[9]	岳乐平,Heller F,邱占祥,等. 兰州盆地第三系磁性地层年代与古环境记录[J].科学通报,2000, 45(18):1 998～2 002[Yue Leping, Heller F, Qiu Zhanxiang. Magnetostratigraphy and paleoenvironmental record of Tertiary deposits of Lanzhou Basin[J].Chinese Science Bulletin,2000,45(18):1 998～2 002]
[10]	Reading. Sedimentary environment and facies. 2nd[M]. London: Blackwell, 1986
[11]	Mial Andrew D.Lithofacies types and vertical profile models in braided river deposits(A Summary)[A]. In: Fluvial Sedimentology[C].Canada Calagary,Alberta. 1978.597～604
[12]	王苏民. 世界咸水湖的物理与化学特征[J].湖泊科学,1993,5(3):278～286[Wang Sumin. Physics and chemistry of saline lakes[J]. Journal of Lakes Sciences, 1993, 5(3): 278～286]
[13]	刘东生,郑绵平,郭正堂. 亚洲季风的起源和发展及其与两极冰盖和区域构造运动的时代偶合性[J]. 第四纪研究,1998,(3):194～204[Liu Dongsheng, Zheng Mianping, Guo Zhengtang. Initiation and evolution of the Asia Monsoon System timely coupled with the ice-sheet growth and the tectonic movements in Asia[J]. Quaternary Science, 1998, (3): 194～204]
[14]	钟大赉,丁林. 青藏高原隆升过程及其机制的探讨[J].中国科学(D辑),1996,26(4):289～295[Zhong Dalai, Ding Lin. Rising process of the Qinghai-Xizang(Tibet) Plateau and its mechanism[J]. Science in China( Series D),1996, 39(4):369]

Sedimentary Environment of Tertiary Recorded in the Yongdeng Section of Lanzhou Basin

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通讯作者: 陈斌, bchen63@163.com

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