论文部分内容阅读
晚更新世以来,中国近海北部陆架近岸地区至少发生了三次海侵并保留三期海相地层.在研究了数千千米的浅地层剖面仪测量资料及大量钻孔资料后,笔者发现最后冰期最盛时期陆架出露,海相地层并非简单地、原封不动地被保留下来.在强大的风力作用下,除进行正常的风成沉积以外,还产生了沉积分异作用,出现风暴沉积及其衍生沉积,裸露的陆架至少部分地改变了原来的沉积结构,形成了新的沉积类型,构成复杂的混杂堆积区和黄土堆积区.这样,原先的海相地层被破坏,或者部分被保留下来,即陆架上海相地层发生了解体.
Since the late Pleistocene, at least three transgressions have occurred and three phase marine reservoirs have been retained in the inshore continental shelf of the northern China offshore. After studying thousands of kilometers of shallow stratum profile measurement data and a large number of borehole data, I found that the shelf was exposed in the heyday of the last ice age, and the marine strata was not retained simply and intact. In addition to the normal aeolian deposits, strong winds produced sedimentary differentiation and storm deposits and their derived deposits. The bare shelf changed, at least partially, the original sedimentary structure and formed a new sediment Type, form a complex mixed accumulation area and loess accumulation area. In this way, the original marine strata were destroyed or partially preserved, that is, the marine strata on the shelf were disintegrated.