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1999•Journal of GeomechanicsRequires access

STUDY ON MAGNETOSTRATIGRAPHY IN QINGHAI-TIBETAN PLATEAU IN LATE CENOZOIC

Qian Fang

Open publisher page 15 citations

Abstract

In this paper,the polarity epochs of some twenty and more sections or boreholes in Qinghai Tibetan plateau in Late Cenozoic are discussed in detail,and thence we have the ages of the sediments involved. The Qiangtang Formation at Kunlun pass has an age of 3 1MaBP~0 65MaBP, the Hipperion sp. contained in it being of an age of 2 08MaBP.The Gongba Formation at Dingri county 2 31MaBP~1 90MaBP,the Zhada Formation and Xiangzi Formation in the Zhada Basin 6 15MaBP~3 40MaBP and 3 40MaBP~1 25MaBP respectively, and Jiawa Formation at Litang 1 24MaBP~0 43MaBP. And the age for the Hipperion guizhongensis sp. from Jilong is 5 0MaBP. The age of early Quaternary glaciation is obtained as well. Thus a chronological scale is provided for the study of the time,and rate of the uplifting of the Plateau as well as the consequent environmental changes.

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What this paper is about

In this paper,the polarity epochs of some twenty and more sections or boreholes in Qinghai Tibetan plateau in Late Cenozoic are discussed in detail,and thence we have the ages of the sediments involved. The Qiangtang Formation at Kunlun pass has an age of 3 1MaBP~0 65MaBP, the Hipperion sp. contained in it being of an age of 2 08MaBP.The Gongba Formation at Dingri county 2 31MaBP~1 90MaBP,the Zhada Formation and Xiangzi Formation in the Zhada Basin 6 15MaBP~3 40MaBP and 3 40MaBP~1 25MaBP respectively, and Jiawa Formation at Litang 1 24MaBP~0 43MaBP. And the age for the Hipperion guizhongensis sp. from Jilong is 5 0MaBP. The age of early Quaternary glaciation is obtained as well. Thus a chronological scale is provided for the study of the time,and rate of the uplifting of the Plateau as well as the consequent environmental changes.

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Available abstract

In this paper,the polarity epochs of some twenty and more sections or boreholes in Qinghai Tibetan plateau in Late Cenozoic are discussed in detail,and thence we have the ages of the sediments involved. The Qiangtang Formation at Kunlun pass has an age of 3 1MaBP~0 65MaBP, the Hipperion sp. contained in it being of an age of 2 08MaBP.The Gongba Formation at Dingri county 2 31MaBP~1 90MaBP,the Zhada Formation and Xiangzi Formation in the Zhada Basin 6 15MaBP~3 40MaBP and 3 40MaBP~1 25MaBP respectively, and Jiawa Formation at Litang 1 24MaBP~0 43MaBP. And the age for the Hipperion guizhongensis sp. from Jilong is 5 0MaBP. The age of early Quaternary glaciation is obtained as well. Thus a chronological scale is provided for the study of the time,and rate of the uplifting of the Plateau as well as the consequent environmental changes.

Key concepts: Magnetostratigraphy, Cenozoic, Geology, Plateau (mathematics), Quaternary, Glacial period, Paleontology, Structural basin

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