摘要
风暴沉积的研究主要以海相为主,湖泊风暴沉积的发现和报道较少,笔者通过柴7井100多m岩心的观察,发现了大量湖泊风暴沉积构造和层序,柴7井井区N1、N21为滨浅湖沉积,具有形成风暴沉积的沉积环境,岩心观察发现冲刷面、截切、沟模、撕扯痕;波状交错层理、波状层理、粒序层理、变形层理、虫迹、波痕等多种与风暴沉积相关的沉积构造。风暴沉积序列遵循5层结构的普遍规律,但大部分风暴沉积序列由于后期风暴的截切、改造而缺失部分层序,形成两期、三期不完整序列沉积叠加,柴7井为近源风暴沉积,以ab、abc、bc等组合为主。
The Study of storm deposits mainly in marine facies and the discovery and report of Lake storm deposits is less. From 100 m core observation of Chai7 well, the author found a lot of storm sedi-mentary structure and sequence in lacustrine deposits. The Chai7 well area was coastal and shallow lake depositional environment for storm deposits easily forming in N1, N21 period. Multiple sedimentary structures related to storm deposits was observed in core for example scour surface, cutting, tearing, gouge marks, hummocky cross stratification, hummocky bedding, graded bedding, deformation bedding, worm trail, wave mark. The storm sedimentary sequences has 5 layer structure, but most of the storm sedimentary sequence missed part sequence due to the later storm cut and transformation and formed two or three incomplete combination sedimentary sequence. Chai7 well as proximal storm deposits with AB, ABC and BC combination.
出处
《地球科学前沿（汉斯）》
2017年第6期837-846,共10页
Advances in Geosciences
