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广泛分布于南海北部大陆架的残留风成沙,在形态、粒度、石英沙粒表面微结构、矿物组成及浅地层剖面等方面总体上具备风成沉积特征。同时,南海北部沙质海岸多处发育的晚更新世古风成沙,在粒度、沉积构造与结构等方面亦有明显的风成沉积特征。二者构成的风沙地貌体发育具有同期性、形态有相似性、空间分布有大陆架向海岸带延伸的连续性。由此表明,南海北部大陆架与毗邻沙质海岸的沙源有同源性,沉积环境有类比性。据此可以认为,南海北部大陆架残留风成沙与海岸带古风成沙为近源沉积成因系列,二者为同期同相连续性沉积。
Residual wind-sediment, which is widely distributed in the northern shelf of the South China Sea, has the characteristics of aeolian sedimentation on the whole in terms of morphology, grain size, surface microstructure of quartz sand, mineral composition and shallow stratum profile. At the same time, paleoclimatology and sedimentation of late Pleistocene developed in many places on the sandy coast of the northern South China Sea also have obvious characteristics of aeolian sedimentation in terms of grain size, sedimentary structure and structure. The sandstorm landform body formed by the two has the same period, similar in morphology, and the spatial distribution has the continuity of extending the continental shelf to the coast. This shows that the northern continental shelf of the South China Sea has similarities with the sand sources adjacent to the sandy coast, and the sedimentary environment is analogous. Based on this, it can be concluded that the remnant wind-sediment of the continental shelf in the northern South China Sea and the ancient coast of the coastal zone are the sedimentary facies series of near-source sedimentation, both of which are in-situ continuous deposition in the same period.