RUN-THROUGH ALONG THE ESTUARY OF THE YALONG RIVER-JINGPINGZI REACH OF THE JINSHA RIVER

XU Qin-mian; YANG Da-yuan Yang; GE Zhaoshuai

Volume 17 Issue 2

Jun. 2011

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XU Qin-mian, YANG Da-yuan Yang, GE Zhaoshuai, 2011. RUN-THROUGH ALONG THE ESTUARY OF THE YALONG RIVER-JINGPINGZI REACH OF THE JINSHA RIVER. Journal of Geomechanics, 17 (2): 185-199.

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XU Qin-mian, YANG Da-yuan Yang, GE Zhaoshuai, 2011. RUN-THROUGH ALONG THE ESTUARY OF THE YALONG RIVER-JINGPINGZI REACH OF THE JINSHA RIVER. Journal of Geomechanics, 17 (2): 185-199.

Citation:

XU Qin-mian, YANG Da-yuan Yang, GE Zhaoshuai, 2011. RUN-THROUGH ALONG THE ESTUARY OF THE YALONG RIVER-JINGPINGZI REACH OF THE JINSHA RIVER. Journal of Geomechanics, 17 (2): 185-199.

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RUN-THROUGH ALONG THE ESTUARY OF THE YALONG RIVER-JINGPINGZI REACH OF THE JINSHA RIVER

1.
Tianjin Institute of Geology and Mineral Resources, China Geological Survey, Tianjin 300170, P R China
2.
School of Geographic and Oceanographic Sciences; Nanjing University, Nanjing 210093, P R China
3.
School of Urban and Environmental Sciences, Xuzhou Normal University, Xuzhou, Jiangsu 221116, P R China

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Received: 2010-11-04
Published: 2011-06-28

Abstract

Abstract

Based on the study of the fluvial geomorphology along the Jinsha river from the estuary of Yalongjiang to Jinpingzi by using the methods of sedimentology, geomorphology and chronology, combining with the character of geomorphology and the Cenozoic sediment in this region, we suggest that the development of reach can be divided into four stages, i.e, 1) the river developing on the plateau (7-4.2 Ma), 2) the lake and basin developing on plateau (4.2-1.1 Ma), 3) the ancient water system developing (1.1-0.73 Ma), and 4) the eastward flowing of Jinsha river (0.73 Ma). 7-4.2 Ma, the river developed after planation surface discomposed.The two steep slopes of 1800-2000 m and 1600-1800 m had formed after the river incised planation surface of 2000 m, and the pebble layer underlying the Formation depositing had formed.The ancient Shenyu river run through Jinsha river, entered into the ancient Zhangjiu river, and converged into the Dianchi lake. 4.2-1.1 Ma, Xigeda formation, and Huili and Huidong basins developed.the ancient Cheng river probably converged into Yuanmou basin and began to form Yuanmou formation.These ancient lake in Panzhihua area and Yuanmou did not link.The ancient Shenyu river divagated and flawed eastward, but not run through. 1.1-0.73 Ma, the ancient Shenyu river run through and formed the Jinsha river.Intensive headward erosion took place toward the ancient Cheng river, so the platform did not form in area of 1400 m along Luonong to Jinpingzi of Jinsha river.The ancient Yalong and Cheng rivers converged into Yuanmou basin. 0.73 Ma, the Jinsha river captured the ancient Cheng and Yalong rivers, and run through this area.The developed of Yuanmou formation finished. 0.73 Ma to now, the bank of 1200-1400 m along Jinsha river had formed steep slop under speedy incising of the river.Terraces has began to form since the late middle Pleistocene.
- Jinsha River,
- fluvial geomorphology,
- Cenozoic sediments,
- run-through,
- headward erosion

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References(34)

References

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