Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1130/B32056.1 |
Reappraisal of Miocene eolian deposition in Tianshui Basin, China, based on an investigation of stratigraphy and provenance | |
Liu, Shanpin1,2; Li, Jijun1,2; Stockli, Daniel F.3; Song, Chunhui1,2,4,5; Guo, Benhong1,2; Stockli, Lisa D.3; Ma, Zhenhua1,2; Li, Xiaomiao1,2; Peng, Tingjiang1,2 | |
2019-07-01 | |
发表期刊 | GEOLOGICAL SOCIETY OF AMERICA BULLETIN |
ISSN | 0016-7606 |
EISSN | 1943-2674 |
出版年 | 2019 |
卷号 | 131页码:1312-1332 |
文章类型 | Article |
语种 | 英语 |
国家 | Peoples R China; USA |
英文摘要 | Eolian deposition in China is intimately related to Asian desertification. The fine-grained sediments in the Cenozoic basins along the northeastern Tibetan Plateau are increasingly reported as eolian deposits due to their loess-like characteristics, thus extending the onset time of Asian desertification from the late Miocene to the early Miocene. However, the basin-scale stratigraphic correlation and geographic origin of these fine-grained sediments remain poorly investigated, limiting any interpretation of the transportation and paleoclimatic conditions responsible for their emplacement. This study combines analyses of detrital zircon U-Pb geochronology and heavy-mineral assemblages to present the first comprehensive stratigraphic and provenance study of Miocene sediments in the Tianshui Basin in northeastern Tibet. Comparison of results from 64 sand-sized and silt-sized samples from various sedimentary beds across the basin reveals that the main stratigraphic packages can be correlated basin-wide, confirming that the silt-sized sediments were a natural part of the basin fill. Statistical visualizations of the large data set from northern and western China clearly shows that the West Qinling Mountains are the main source of the Tianshui Basin silts. Contribution estimates corroborate this conclusion and eliminate the likelihood of substantial contributions from other mountains and drylands. Moreover, the significant differences between the Tianshui Basin silts and the Chinese Loess Plateau/Red Clay are reflected by their heavy-mineral compositions and euhedral zircon U-Pb ages. These provenance analyses strongly contradict the previous assumption of desert origin for the Tianshui Basin silts. Moreover, the northward transport of the Tianshui Basin silts conflicts with the prevailing dust pathway driven by the Asian westerlies and winter monsoons, which do not support the eolian interpretation for their formation. Consequently, we suggest that the Miocene Tianshui Basin silts cannot be used as an indicator of extensive desertification, in contrast with the suggestions of previous studies. This proposal undermines the corresponding hypothesis of an early Miocene onset of Asian interior desertification, and further raises questions about the validity of prevalent paleoclimatic interpretations drawn from fine-grained basin sediments. |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000471802800014 |
WOS关键词 | NORTHERN TIBETAN PLATEAU ; HEAVY MINERAL ANALYSIS ; LOESS-SOIL SEQUENCE ; RED CLAY DEPOSITS ; U-PB ; TECTONIC EVOLUTION ; DETRITAL ZIRCONS ; QAIDAM BASIN ; TARIM BASIN ; NORTHEASTERN TIBET |
WOS类目 | Geosciences, Multidisciplinary |
WOS研究方向 | Geology |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/184604 |
专题 | 地球科学 |
作者单位 | 1.Lanzhou Univ, Coll Earth Environm Sci, Minist Educ, Lanzhou 730000, Gansu, Peoples R China; 2.Lanzhou Univ, Minist Educ, Key Lab Western Chinas Environm Syst, Lanzhou 730000, Gansu, Peoples R China; 3.Univ Texas Austin, Jackson Sch Geosci, Dept Geol Sci, Austin, TX 78712 USA; 4.Lanzhou Univ, Sch Earth Sci, Lanzhou 730000, Gansu, Peoples R China; 5.Lanzhou Univ, Key Lab Western Chinas Mineral Resources Gansu Pr, Lanzhou 730000, Gansu, Peoples R China |
推荐引用方式 GB/T 7714 | Liu, Shanpin,Li, Jijun,Stockli, Daniel F.,et al. Reappraisal of Miocene eolian deposition in Tianshui Basin, China, based on an investigation of stratigraphy and provenance[J]. GEOLOGICAL SOCIETY OF AMERICA BULLETIN,2019,131:1312-1332. |
APA | Liu, Shanpin.,Li, Jijun.,Stockli, Daniel F..,Song, Chunhui.,Guo, Benhong.,...&Peng, Tingjiang.(2019).Reappraisal of Miocene eolian deposition in Tianshui Basin, China, based on an investigation of stratigraphy and provenance.GEOLOGICAL SOCIETY OF AMERICA BULLETIN,131,1312-1332. |
MLA | Liu, Shanpin,et al."Reappraisal of Miocene eolian deposition in Tianshui Basin, China, based on an investigation of stratigraphy and provenance".GEOLOGICAL SOCIETY OF AMERICA BULLETIN 131(2019):1312-1332. |
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