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Provenance analysis of the Late Cenozoic sediments in Dalangtan area, northwestern Qaidam Basin: evidence from detrital zircon U-Pb ages and Hf isotopes
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Menghan XIAO, Mianping ZHENG, Yongsheng ZHANG, Xianhua HOU, Linfeng SHI
Journal of Palaeogeography (Chinese Edition) | 2026, 28(3) : 949 - 969
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Journal of Palaeogeography (Chinese Edition) | 2026, 28(3): 949-969
• SPECIAL TOPIC ON THE 100TH ANNIVERSARY OF PROFESSOR FENG ZENGZHAO •
Provenance analysis of the Late Cenozoic sediments in Dalangtan area, northwestern Qaidam Basin: evidence from detrital zircon U-Pb ages and Hf isotopes
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Menghan XIAO, Mianping ZHENG, Yongsheng ZHANG, Xianhua HOU, Linfeng SHI
Affiliations
  • MLR Key Laboratory of Saline Lake Resources and Environments, Institute of Mineral Resources,Chinese Academy of Geological Sciences, Beijing 100037, China

    • XIAO Menghan,born in 1999,Ph.D. candidate,is primarily engaged in researches on salinology and paleomagnetism. E-mail: .

About Author:

XIAO Menghan,born in 1999,Ph.D. candidate,is primarily engaged in researches on salinology and paleomagnetism. E-mail: .

Published: 2026-06-01 doi: 10.7605/gdlxb.2026.110
Outline
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The Qaidam Basin,on the northeastern margin of the Tibetan Plateau,preserves distinctive stratigraphic and sedimentary records of a complex basin-mountain system and multiple provenance sources. In the Dalangtan-Heibei sag of the northwestern basin,a thick Late Cenozoic gravel succession hosts a newly recognized gravel-type potash-bearing brine deposit. In this study,seven sandstone samples from different depths in boreholes CJ-2 and CJ-3 were analyzed for detrital zircon U-Pb geochronology,trace elements,and Lu-Hf isotopes. The detrital zircons are predominantly magmatic in origin,with Th/U ratios of 0.02-1.26 and REE patterns characterized by HREE enrichment,pronounced negative Eu anomalies,and positive Ce anomalies. U-Pb ages range from 213.9 to 3307 Ma and define four main age groups: 200-300 Ma,330-510 Ma,740-990 Ma,and 1.1-3.3 Ga. Provenance comparison shows that the Qigequan Formation in borehole CJ-2 was sourced mainly from the East Kunlun-Qimantagh,whereas that in borehole CJ-3 was influenced chiefly by the Altyn Tagh and the northern Qaidam margin. The Shizigou Formation shows stronger multi-source mixing: in borehole CJ-2 it records contributions from the East Kunlun-Qimantagh,northern Qaidam margin,South Qilian Mountains,and Altyn Tagh,whereas in borehole CJ-3 it was derived mainly from the East Kunlun-Qimantagh,with subordinate input from the Altyn Tagh and northern Qaidam margin. These inter-well provenance differences reflect the combined effects of lateral differentiation within the piedmont alluvial-proluvial fan system and intensified Late Cenozoic tectonic activity. The results can provide reliable age evidence for the rapid uplift of the Altun Mountains and the northern margin of the Tibetan Plateau,and offer new age constraints for exploring the gravel type potassium-bearing brine resources in the Dalangtan-Heibei sag of Qaidam Basin.

Zircon U-Pb dating  /  Hf isotopic  /  LA-ICP-MS  /  provenance analysis  /  Qaidam Basin
肖梦晗, 郑绵平, 张永生, 侯献华, 施林峰. 柴西北晚新生代沉积源区分析:来自碎屑锆石U-Pb年龄及Hf同位素的约束*. 古地理学报, 2026 , 28 (3) : 949 -969 . DOI: 10.7605/gdlxb.2026.110
Menghan XIAO, Mianping ZHENG, Yongsheng ZHANG, Xianhua HOU, Linfeng SHI. Provenance analysis of the Late Cenozoic sediments in Dalangtan area, northwestern Qaidam Basin: evidence from detrital zircon U-Pb ages and Hf isotopes[J]. Journal of Palaeogeography (Chinese Edition), 2026 , 28 (3) : 949 -969 . DOI: 10.7605/gdlxb.2026.110
Funding
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  • National Key Research and Development Program of China(2023YFC2906501)
  • Geological Survey Project of the China Geological Survey(DD20230755)
Appendix
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Year 2026 volume 28 Issue 3
188
79
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Article Info
doi: 10.7605/gdlxb.2026.110
  • Receive Date：2026-02-27
  • Online Date：2026-09-24
  • Published：2026-06-01
Article Data
Affiliations
History
  • Received：2026-02-27
  • Revised：2026-04-15
Funding
National Key Research and Development Program of China(2023YFC2906501)
Geological Survey Project of the China Geological Survey(DD20230755)
Affiliations
    MLR Key Laboratory of Saline Lake Resources and Environments, Institute of Mineral Resources,Chinese Academy of Geological Sciences, Beijing 100037, China

Corresponding:

ZHANG Yongsheng,born in 1963,Ph.D.,researcher and Ph.D. supervisor,is primarily engaged in researches on the geology of salt deposits and “oil-potash dual exploration”. E-mail: .
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Citations
表12种不同金属材料的力学参数
科
Family		 属数
Number of
genus		 种数
Number of
species		 占总种数比例
Percentage of
total species (%)		 属
Genus		 种数
Number of
species		 占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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