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老红砂是主要分布于我国东南沿海的,呈现以棕红色、红色、橙黄色为主的半胶结中-细砂质沉积物。笔者综述了前人在老红砂的分布与形态、沉积特征、形成机制、发育时代、红化作用、古地理环境等方面的研究成果,认为其为晚更新世沉积物,主体属风成沉积,热带-亚热带湿热季风气候导致的含铁物质分解和氧化是砂体红化的主要原因。根据研究现状,对存在的问题和今后的研究重点做一探讨和展望。
Old red sand is mainly distributed in China’s southeast coast, showing a reddish brown, red, orange-based semi-cemented - fine sandy sediments. The author summarizes the research results of the predecessors in the distribution and morphology of red sandstone, sedimentary characteristics, formation mechanism, developmental age, redness, paleogeography and so on. It is considered that it is a late Pleistocene sediment, The main reason for sandstone redistribution is the decomposition and oxidation of ferrous materials caused by tropical-subtropical hot and humid monsoon climate. According to the status quo of research, make a discussion and prospect on the existing problems and future research priorities.