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- W2372445793 abstract "A thick succession of the Cenozoic fluvial-lacustrine sediments was deposited on the southern margin of the Junggar Basin. This succusion preserves useful information to decipher the tectonic history of Tianshan Mountains and the environmental changes in the Junggar Basin. However, an accurate time scale of the Cenozoic strata has not been built. In order to construct a detailed time scale for the Cenozoic strata on the southern margin of Junggar Basin, we carried out a magnetostratigraphic study of the Jingou River section, which is located at the Huoerguosi Anticline, the westernmost one of the second fold and thrust fault zone in the northern piedmont of Tianshan Mountains. The new magnetostratigraphic data provide constraints on the ages of the different formations of the Cenozoic strata on the southern margin of Junggar Basin. The Jingou River section, about 4 160 m in thickness, is continuous according to the observed gradual change in sedimentary environments and can be divided into five formations: Anjihaihe, Shawan, Taxihe, Dushanzi and Xiyu in ascending order. Characteristic remanences (ChRMs) were isolated by progressive thermal demagnetization, generally between 300 and 680℃. A total of 1 285 samples yielded well-defined ChRMs and were used to establish the magnetostratigraphic column of a 3 270 m-thick section from the exposed base of the Anjihaihe Formation to the middle of the Xiyu Formation. Two vertebrate fossil horizons in the section and good correlation of the magnetostratigraphic column with the GPTS suggest that the section was deposited from ~28.0 to ~4.0 Ma. The ages of the Anjihaihe, Shawan, Taxihe, Dushanzi and Xiyu formations in the studied section are estimated to be ~28.0—23.3Ma, 23.3—17.5Ma, 17.5—13.2Ma, 13.2—6.0Ma and 6.0—1.1Ma, respectively. The ages of the Anjihaihe, Shawan and Taxihe formations are comparable to those published by previous researchers, whereas the ages of the Dushanzi and Xiyu formations are older than previously thought." @default.
- W2372445793 created "2016-06-24" @default.
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- W2372445793 date "2010-01-01" @default.
- W2372445793 modified "2023-09-23" @default.
- W2372445793 title "AGES OF THE CENOZOIC STRATA ON THE SOUTHERN MARGIN OF JUNGGAR BASIN,NORTHWESTERN CHINA" @default.
- W2372445793 hasPublicationYear "2010" @default.
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