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引用本文:王节涛,裴来政,张宏鑫,N'dji dit Jacques DEMBELE. 大别山南麓阳逻组砾石层砾石形貌学研究[J]. 中国地质, 2021, 48(1): 139-148.
WANG Jietao,PEI Laizheng,ZHANG Hongxin,N'dji dit Jacques DEMBELE. Morphology of gravels from the Yangluo Formation in the Southern Piedment of Dabie Mountains[J]. Geology in China, 2021, 48(1): 139-148(in Chinese with English abstract).
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大别山南麓阳逻组砾石层砾石形貌学研究
王节涛1,2,3, 裴来政1, 张宏鑫1, N'dji dit Jacques DEMBELE2,3
1.中国地质调查局武汉地质调查中心, 湖北 武汉 430205;2.Université3.des Sciences Sociales et de Gestion de Bamako, Bamako, Mali, bp2575
摘要:
阳逻组砾石层分布于大别山南麓长江北岸地区,是长江中游地区一个重要的第四纪地层单位。其成因主要有两种观点:一种观点认为阳逻组砾石层为古长江冲积物,后期经过构造抬升而在长江北岸形成阶地;另一种观点认为其为大别山南麓河流冲积扇。砾石层中的砾石形貌记录了砾石的演化历史,对砾石进行形貌学研究可以用来进行古环境重建。文章选取武汉地区黄陂区横店镇、新洲区阳逻镇附近的25个砾石剖面中的2693颗砾石的外形参数进行测量。其中横店14个剖面中1377颗砾石、阳逻11个剖面中1316颗砾石。Zingg分类显示砾石以扁长形为主,砾石层在Sneed-Folk三角图中的主要分布于过渡相和河流相,砾石层中存在的大量片岩。这些特征均指示阳逻组砾石层是的物源区为大别山地区,它是大别山南麓河流形成的冲洪积扇堆积物。
关键词:  长江  阳逻组  砾石层  砾石组构  物源分析  形貌参数  地质调查工程
DOI:10.12029/gc20210110
分类号:P931.1
基金项目:国家自然科学基金“利用沉积学和地貌学方法反演晚新生代大别山南麓水系的重组过程”(41501004)、中国地质调查局项目“武汉多要素城市地质调查”(DD20160250-6)、“长江中游宜昌-荆州和武汉-黄石沿岸段1∶5万环境地质调查”(DD20160250)资助。
Morphology of gravels from the Yangluo Formation in the Southern Piedment of Dabie Mountains
WANG Jietao1,2,3, PEI Laizheng1, ZHANG Hongxin1, N'dji dit Jacques DEMBELE2,3
1.Wuhan Center of China Geological Survey, Wuhan, Hubei Province 430205, China;2.Université3.des Sciences Sociales et de Gestion de Bamako, Bamako bp2575, Mali
Abstract:
As one of the most important Quaternary strata in the middle reach of Yangtze River, the gravel layers within the Yangluo Formation are distributed in the north bank of the Yangtze River at the southern foot of Dabie Mountains. There are two views on the origin of the gravel layers. One view holds that the gravel layers of Yangluo Formation are alluvial sediments of the Ancient Yangtze River, which formed terraces on the north bank of the Yangtze River after later tectonic uplifting. Another view is that they are the alluvial fans at the southern foot of Dabie Mountains. As gravel's morphology records its evolution, the study of its morphology can be used to reconstruct palaeoenvironment. In our project, 25 gravel layer profiles were chosen to select total 2693 gravels for measurement of morphological parameter, including 1377 gravels from 14 profiles in Hengdian Town and 1316 gravels from 11 profiles in Yangluo Town. Zingg classification shows that most gravel is mainly oblong shape, and it is mainly distributed in the transitional and fluvial facies in the Sneed Folk triangle. There is a large amount of schist in the gravel layer. The morphological characteristics of the gravel layer of Yangluo Formation indicate that it is of alluvial-diluvial fan deposits formed by rivers at the southern foot of Dabie Mountains.
Key words:  Yangtze River  Yangluo Formation  gravel layer  provenance  morphometric parameter  geological survey engineering