中文摘要：

地球历史中生命与环境不断发生更替,先后形成寒武纪生态系统、古生代生态系统和现代生态系统。地域上,又分为海洋生态系统和陆地生态系统。中生代以来,中国以陆地生态系统为特色。东北地区发育以松辽、嘉荫盆地为主的大型白垩纪沉积盆地,以及冀北、辽西和内蒙古东部盛产热河生物群的火山-沉积盆地。白垩纪先后发育有热河生物群、阜新生物群、松花江生物群和嘉荫生物群。该地区白垩系是建立中国陆相地层格架的标准,依据不同生物群发育及气候演化阶段,自下而上被划分为下白垩统冀北阶、热河阶和辽西阶,上白垩统农安阶、松花江阶和绥化阶。基于松科1井多重地层学研究,完善了包括磁性地层、天文地层、同位素年代地层、生物地层和定量地层学为主的中国晚白垩世陆相年代地层的标准,还使其达到与国际地层表的对比。通过生物群的宏观演化,探讨了中国东北地区白垩纪环境与气候的演化规律,明确了晚白垩世的2次重大湖泊事件。其中,湖泊咸化问题得到深入研究,从古生物学和地球化学角度为松辽湖盆的海侵活动提供了可靠证据。化石与地化记录揭示,当时全球高海平面的影响可能波及松辽盆地,海水短暂地侵入湖盆,带入海相生物,引发海水咸化、δ~（13） Corg异常和有机质大量埋藏。这些记录可与全球高海平面地层对比。嫩江组下部海侵印记最为明显,其背景与第3期大洋缺氧事件（OAE 3）极为相近。松辽盆地的环境演化既受制于区域性构造作用,也受控于全球气候的影响,更代表了白垩纪温室时期的东亚陆地表现。

英文摘要：

Northeast China offers a unique opportunity to perceive Cretaceous stratigraphy and climate of terrestrial settings.The sediments contain variegated clastic and volcanic rocks,diverse terrestrial fossils,and important coal and oil resources.Four Cretaceous biotas of Jehol,Fuxin,Songhuajiang and Jiayin occurred in ascending order.For scientific purpose,a coring program（SK1）provides significant material for Cretaceous research.The SK1 presents a continuous section of Upper Cretaceous non-marine fossils,magnetochron successions and chronostratigraphic events.These events are integrated with marine events by an X/Y graphic plot between the core data and a global database of GSSP and key reference sections.More precisely,age interpolation based on CA-ID-TIMS U-Pb zircon dates and the calibrated cyclostratigraphy places the end of the Cretaceous Normal Superchon at 83.07±0.15 Ma.This date also serves as an estimate for the SantonianCampanian stage boundary.It also places the K/Pg boundary within the upper part of the Mingshui Formation.The terrestrial and marine life and the analysis of elemental composition,δ~（13） Corg,biomarkers show that lake water salinity changed along with a Coniacian-Santonian marine incursion.High lake-level coincides with the sea transgression during the time.High salinity resulted in the development of periodic anoxic environments of the basin.One of these times of deposition of organic-rich mud correlates with the magnetochron of C34n/C33 rand Coniacian-Santonian planktic foraminifera.This marine flooding correlates with OAE 3and it is possible that the global oceanic anoxic event may have influenced organic carbon burial in the Songliao Basin for this brief period.The evolution of 4biotas corresponds to the Cretaceous climate change.We tentatively interpret the terrestrial record to reflect the changes in both global climate and regional basin evolution.