XU Baoliang

Peking University

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Baolei Mu

Peking University

Zhang Renhu

Lanzhou University of Technology

Guohan Yan

Peking University

Qiao Guangsheng

Chinese Academy of Sciences

Guanyu Wang

Peking University Third Hospital

Xiaofang Wang

Jiangxi Science and Technology Normal University

Bao‐Fu Han

Peking University

Linkun Tan

Peking University

Hui Zhao

Southern University of Science and Technology

Guoqi He

North China University of Water Resources and Electric Power

Cooperative Institutions

Peking University

Chinese Academy of Sciences

Chinese Academy of Geological Sciences

Czech Academy of Sciences, Institute of Geology

Institute of Geology and Geophysics

Kunming University of Science and Technology

China University of Geosciences (Beijing)

Saudi Heart Association

Peking University Third Hospital

University of Science and Technology of China

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Alkaline Intrusives at the East Foot of the Taihang‐Da Hinggan Mountains: Chronology, Sr, Nd and Pb Isotopic Characteristics and Their Implications

Acta Geologica Sinica - English Edition (2000)

Guohan Yan XU Baoliang Baolei Mu Guanyu Wang Zhaoshan Chang

Abstract Based on the Rb‐Sr isochron dating results, this paper suggests that the alkaline intrusive belt at the east foot of the Taihang‐Da Hinggan Mountains were formed between 135 and 122 Ma. And the alkaline intrusives in the north and south sections of this belt have entirely different Sr, Nd and Pb isotopic characteristics, i.e., all the rocks in the south section have positive ɛ Sr ( t ) and negative ɛ Nd ( t ) values and all those in the north have the opposite values. On the ɛ Sr ( t ) versus ɛ Nd ( t ) correlation diagram, the samples from the south are concentrated along the enriched mantle evolution trend lines and nearby, while those from the north fall along the depleted mantle trend lines and nearby. On the Pb isotope composition diagram, most of the samples from the south section fall on the mantle Pb evolution line and nearby, while those from the north lie between the Pb evolution lines of the mantle and the orogenic belt. The above‐stated isotopic characteristics not only indicate that the source rocks of the alkaline intrusives in the south section have a close connection to materials from the enriched mantle reservoir, while those in the north are related to materials from the depleted one, but also reveal that the upper mantle below the North China platform is enriched and that below the Inner Mongolia geosyncline is depleted.

Geosyncline

Chronology

Isochron dating

10.1111/j.1755-6724.2000.tb00493.x

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Citations (17)

Triassic alkaline intrusives in the Yanliao-Yinshan area: their chronology, Sr, Nd and Pb isotopic characteristics and their implication

Science in China Series D Earth Sciences (1999)

Guohan Yan Baolei Mu XU Baoliang Guoqi He Linkun Tan

Chronology

10.1007/bf02877785

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