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白垩纪松辽盆地:从火山裂谷到陆内拗陷的动力学环境
  • ISSN号:1005-2321
  • 期刊名称:地学前缘
  • 时间:2015.1
  • 页码:99-117
  • 分类:P534.53[天文地球—古生物学与地层学;天文地球—地质学] P547[天文地球—构造地质学;天文地球—地质学]
  • 作者机构:[1]吉林大学地球科学学院,吉林长春130061, [2]大庆油田有限责任公司勘探开发研究院,黑龙江大庆163712, [3]吉林大学古生物学与地层学研究中心,吉林长春130026
  • 相关基金:国家重点基础研究发展计划“973”项目(2012CB822000); 国家自然科学基金项目(41202072)
  • 相关项目:松辽盆地北部晚白垩世古土壤的综合识别及地层对比意义
中文摘要:

基于科探井等新成果,从全球构造-盆地分类和松辽盆地成因类型综述入手,通过区域构造背景和盆地构造-充填特征分析,研究松辽盆地类型、构造演化和地球动力学。松辽盆地位于蒙古—华北板块东北部边缘带,其北部通过蒙古—鄂霍茨克缝合带与西伯利亚板块相连,东部通过锡霍特—阿林构造带与太平洋板块相连。其形成演化受这两个活动陆缘带的影响。营城组和嫩江组顶部的2个区域性不整合面把松辽盆地分成3个构造层:断陷层(火石岭组—营城组)、拗陷层(登娄库组—嫩江组)和反转层(四方台组—依安组)。前者属火山裂谷盆地,后两者为陆内拗陷盆地。断陷期150~110 Ma,在北部与东部两个活动陆缘带共同作用下,板块重组导致区域性伸展和大规模裂陷,形成同裂谷期火山-沉积序列。后裂谷期110~79.1 Ma沉积,是火山期后热沉降与区域走滑拉分沉降叠加的结果,其沉降速率高沉积厚度大,因此形成大规模烃源岩沉积。挤压反转期79.1~40 Ma,表现为沉积沉降中心向西北迁移和盆地逐渐萎缩消亡,是白垩纪中期至中始新世太平洋板块向欧亚大陆边缘近于正向俯冲、区域挤压的结果。

英文摘要:

On the basis of the new results of the CCSD (China Cretaceous Continental Scientific Drilling) and the integrated information concerning tectonic basin classification and 3-D description of the Songliao Basin (SB), we reevaluate the type, tectonic evolution, and geodynamics of the SB according to systematical analysis of tectonic setting and basin fillings. The SB is on the northeast marginal zone of Mongolia-North China Plate. It is united with the Siberian Plate by the Mongolia- Okhotsk suture belt to the north, and connected with the Pacific Plate by Sikhote- Alin accretionary belt to the east. The vertical filling successions of the SB can be subdivided into three tectono-stratigraphic units by two regional unconformities which are on the top boundaries of the Yingcheng (Kly) (ca. 110 Ma) and Nenjiang (K2n) (ca. 79.1 Ma) Formations, respectively. The three tectono-stratigraphic units are block faulting (Huoshiling to Yingcheng Formations), interior sag (Denglouku to Nenjiang Formations), and structural inversion (Sifangtai to Yi'an Formations) sequences. The block faulting sequence is a kind of volcanic rift basin, and the latter two all belong to the type of interior sag basin. In the block faulting period (150 - 110 Ma), syn-rift volcanogenic successions were formed under the impact of regional extension that may be caused by the Plate reorganization from two sides, the northern and eastern active continental margins. The post-rift basin fills (110-79.1 Ma) may result from the superimposed subsidence of both post volcanic thermal declining and regional strike-slip pull-apart effect. Widespread and thick source rocks deposited because of the high rate and under-compensation of sedimentation in this period. In the structural inversion period (79.1 - 40 Ma), depocenter of the SB migrated northwestward, and the basin was shrinking to demise. This was a result of the regional compression that should be caused by the Pacific Plate subduction under the eastern marg

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期刊信息
  • 《地学前缘》
  • 中国科技核心期刊
  • 主管单位:教育部
  • 主办单位:中国地质大学(北京) 北京大学
  • 主编:王成善
  • 地址:北京市学院路29号
  • 邮编:100083
  • 邮箱:frontier@cugb.edu.cn
  • 电话:010-82322973
  • 国际标准刊号:ISSN:1005-2321
  • 国内统一刊号:ISSN:11-3370/P
  • 邮发代号:
  • 获奖情况:
  • 荣获第五、六届"百种中国杰出学术期刊","首届中国高校精品科技期刊"称号
  • 国内外数据库收录:
  • 俄罗斯文摘杂志,美国化学文摘(网络版),荷兰文摘与引文数据库,美国工程索引,美国地质文献预评数据库,英国动物学记录,日本日本科学技术振兴机构数据库,中国中国科技核心期刊,中国北大核心期刊(2004版),中国北大核心期刊(2008版),中国北大核心期刊(2011版),中国北大核心期刊(2014版)
  • 被引量:34961