黑龙江省鸡西盆地南、北两带城子河组精细对比

鸡西盆地被平麻断裂分割成南、北两个条带，多数研究者将南带1煤之下的海相层叠伏于北带海相层或底砾岩之下，称为“城子河组下段”或“石河北组”。利用事件地层学的原理，分析盆地内城子河组早期盆地裂陷、海侵、火山喷发、聚煤等重大事件在地层精细对比方面的意义，甄别出了盆地中重大事件的地层记录．以等时层为基础建立对比框架。通过大量钻井资料追溯对比，认为盆地中坳陷部位的渴湖海湾沉积是南北两带的沉积过渡类型，根据微体古生物研究，南北两带海相层中的沟鞭藻类化石面貌基本一致，南北带的海相层应是同一层位，初步实现了盆地内南、北两个条带城子河组的精细对比，为恢复盆地古地理环境奠定了可靠的基础。

Meticulous Correlation between Southern and Northern Belts of Chengzihe Formation in Jixi Basin,Heilongjiang Province

The Jixi basin can be divided into southern and northern belts demarcated by the Pingyang-Mashan fault. Through the ages, the marine sequence below No.1 coal seam in the southern belt, which is customarily called as ＂Lower Member of Chengzihe Formation＂ or ＂Shihebei Formation＂, had traditionally considered to be under the marine sequence or basal conglomerate of the northern belt. Using the event stratigraphy theory, the author analyzed important significances of consequential event of rifts, transgressions, volcano eruptions and coal accumulations in the earlier stage of the forming of Jixi basin, discriminated stratigraphic records of consequential events, thus the correlation frame is established on the basis of isochronous sequence. Through review and correlation of large amount drilling data, considered that the lagoon bay deposit in the depression part of the basin belongs to intermediate type deposit between the two belts. Based on micropaleontological study, visage of Dinoflagellate fossil in marine sequences of the .wo belts is basically the same, so the marine sequences in the two belts should belong to one and the same horizon. Thus the meticulous correlation of Chengzihe Formation in the two belts is preliminarily brought to success and has set a dependable basis for the restoration of the basin＇s paleogeographic environment.