Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1130/B35334.1 |
Conglomerate recycling in the Himalayan foreland basin: Implications for grain size and provenance | |
Quick, Laura1; Sinclair, H. D.1; Attal, M.1; Singh, V2 | |
2020-07-01 | |
发表期刊 | GEOLOGICAL SOCIETY OF AMERICA BULLETIN
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ISSN | 0016-7606 |
EISSN | 1943-2674 |
出版年 | 2020 |
卷号 | 132期号:7-8页码:1639-1656 |
文章类型 | Article |
语种 | 英语 |
国家 | Scotland; India |
英文摘要 | The nature of coarse sediment in rivers emerging from mountain ranges determines rates of downstream fining, the position of the gravelsand transition, sediment entrainment thresholds, and channel morphologies. Additionally, in the stratigraphic record, clast size distributions and lithologies are used to reconstruct paleohydraulic conditions and source area provenance. Using Himalayan rivers, we demonstrate that the signal of first-generation clasts derived from the hinterland of a mountain range can be significantly altered by recycling older, structurally exhumed foreland deposits. The Siwalik foothills of the Himalaya comprise Neogene fluvial sandstones and quartzite- rich conglomerates with well-rounded clasts that were deposited in the Indo-Gangetic foreland basin and later exhumed by erosion, following uplift along the Himalayan mountain front. Mass balance calculations reveal that the Upper Siwalik conglomerate may contribute a significant proportion of the total gravel flux exported from the main Himalayan catchments (up to 100%) despite forming <1% of the catchment geology. Three end-member catchments with variable proportions of gravel flux from Siwalik conglomerates are analyzed to test for the effects of conglomerate recycling. Catchments that recycle the most Upper Siwalik conglomerate form quartzite-rich gravel bars comprising well-rounded pebbles and a narrow grain size distribution, mimicking the characteristics of the Upper Siwalik conglomerate. Conversely, catchments that recycle the least Upper Siwalik conglomerate form gravel bars with a range of Himalayan lithologies, angular quartzite pebbles and a wider grain size distribution. This study highlights that recycling of quartzite-rich conglomerate can dramatically modify the flux, lithology, grain size, and shape of gravel entering the Indo-Gangetic Plain. |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000545115400017 |
WOS关键词 | MAGNETIC POLARITY STRATIGRAPHY ; INDIA-EURASIA COLLISION ; GRAVEL PROGRADATION ; TECTONIC EVOLUTION ; CHANNEL MORPHOLOGY ; GRAVITY-ANOMALIES ; KINEMATIC HISTORY ; RIVER MORPHOLOGY ; SEDIMENT STORAGE ; GANGETIC PLAINS |
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/289431 |
专题 | 地球科学 |
作者单位 | 1.Univ Edinburgh, Sch GeoSci, Drummond St, Edinburgh EH8 9XP, Midlothian, Scotland; 2.Univ Delhi, Dept Geol, Delhi 110007, India |
推荐引用方式 GB/T 7714 | Quick, Laura,Sinclair, H. D.,Attal, M.,et al. Conglomerate recycling in the Himalayan foreland basin: Implications for grain size and provenance[J]. GEOLOGICAL SOCIETY OF AMERICA BULLETIN,2020,132(7-8):1639-1656. |
APA | Quick, Laura,Sinclair, H. D.,Attal, M.,&Singh, V.(2020).Conglomerate recycling in the Himalayan foreland basin: Implications for grain size and provenance.GEOLOGICAL SOCIETY OF AMERICA BULLETIN,132(7-8),1639-1656. |
MLA | Quick, Laura,et al."Conglomerate recycling in the Himalayan foreland basin: Implications for grain size and provenance".GEOLOGICAL SOCIETY OF AMERICA BULLETIN 132.7-8(2020):1639-1656. |
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