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“残留砂”一般是指晚更新世末期或全新世早期留在大陆架上的沉积物.它是在晚大理冰期最低海面后海平面不断上升过程中不同阶段的滨海相沉积,从冰后期海平面大规模上升以来,沉积作用在这些地区是微不足道的或者竟完全缺失,从而使砂质沉积直接裸露在海底表面,未被现代沉积所覆盖.根据F·P·谢帕德、K·O·埃默里等人的研究,覆盖着世界上全部大陆架的沉积物中,大约有70%是属于残留物质,而其中分布最广的乃是残留砂.我国1962年秦蕴珊首次对东海陆架残留砂进行了初步研究.之后,有关单位通过对渤海、黄海、东海和南海的调查,进一步证实了在我国大陆架上也广泛发育着残留砂,尤其以在东海的分布更为宽阔,占该陆架总面积的2/3,并向北延伸到黄海的南部.
“Residual sand” generally refers to the sediments left on the continental shelf in the late Late Pleistocene or early Holocene, and it is a sedimentary facies sedimentation at different stages of the sea level rising after the lowest sea level in the late Dali ice age. Sedimentation has been negligible or virtually absent in these areas since the scale was up, leaving sandy sediments directly exposed to the surface of the seafloor without being covered by modern sediments. According to FRP Shepard, Among others, about 70% of the sediments in all the continental shelf sediments in the world belong to residual matter, of which the most widely distributed is residual sand. In 1962, Qin Yunshan first made a preliminary study of the East China Sea shelf residual sand After that, the investigation of the Bohai Sea, the Yellow Sea, the East China Sea and the South China Sea further confirmed that the residual sand was widely developed on the continental shelf of China, especially in the East China Sea, accounting for 2 / 3, and extends north to the south of the Yellow Sea.