东昆仑东段哈拉郭勒—哈图一带中生代的岩石隆升剥露——锆石和磷灰石裂变径迹年代学证据

王国灿; 向树元; GarverJohn I; WintschRobert P; Roden-TiceMary

Volume 28 Issue 6

Nov. 2003

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Article Navigation > Earth Science > 2003 > 28(6): 645-652

WANG Guo-can, XIANG Shu-yuan, Garver John I, Wintsch Robert P, Roden-Tice Mary, 2003. Uplift and Exhumation during Mesozoic in Halaguole-Hatu Area, East Segment of Eastern Kunlun Mountains : Evidence from Zircon and Apatite Fission-Track Ages. Earth Science, 28(6): 645-652.

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Uplift and Exhumation during Mesozoic in Halaguole-Hatu Area, East Segment of Eastern Kunlun Mountains : Evidence from Zircon and Apatite Fission-Track Ages

1.
Faculty of Earth Sciences, China University of Geosciences, Wuhan 430074, China
2.
Department of Geology, Olin Center, Union College, Schenectady, New York 12308-2311, USA
3.
Department of Geological Sciences, Geology Building, Indiana University, Bloomington, Indiana 47405-1403, USA
4.
Earth and Environment Sciences, State University of New York at Plattsburgh, Plattsburgh, NY 12901, USA

Received Date: 2003-05-15
Publish Date: 2003-11-25

Abstract

Abstract

This paper discusses the uplift and exhumation processes during Mesozoic in Halaguole-Hatu area, east segment of the eastern Kunlun, by dating the zircon and apatite fission-track ages and geobarometer analysis of the hornblende of intermediate-acidic intrusive rocks. The geobarometer analysis of the hornblende of intermediate-acidic intrusive rocks in Hatu area illustrates that the total exhumation range is about 8-9 km since the Late Hercynian-Indosinian, which happened vey slowly, about (20-) 40 m/Ma, from the Early Permian to the early stage of the Late Triassic. While the zircon fission-tract age dating of the samples from different elevations reveals a slow uplift process during the Middle and Late Jurassic. The uplift rate in the Middle Jurassic, 77-88 m/Ma, is correspondingly faster than that in the Late Jurassic, less than 37 m/Ma. This slowing down tendency reflects the gradual decay of the intensive uplift at the boundary time of the Early and Middle Jurassic. The zircon and apatite fission-track age pairs show the exhumation rate is normally less than 55 m/Ma since the Middle Jurassic. Meanwhile, the rock exhumation rate is basically at the same quantity grade as that of its uplift rate, implying that its exhumation and uplifting were in equilibrium on the whole.
- east segment of the eastern Kunlun,
- Mesozoic,
- uplift and exhumation,
- zircon and apatite fission-track chronology

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References

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