The Cretaceous Songliao Basin: Volcanogenic Succession, Sedimentary Sequence and Tectonic Evolution, NE China
The Cretaceous Songliao Basin: Volcanogenic Succession, Sedimentary Sequence and Tectonic Evolution, NE China
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DOI：
10.1111/j.1755-6724.2007.tb01022.x
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发表时间：
2007-12
期刊：
影响因子：
--
通讯作者：
Wang Pujun;Xie Xiao-an;Mattern Frank;Ren Yan-guang;Z. Defeng;Sun Xiaomeng
中科院分区：
文献类型：
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作者：
Wang Pujun;Xie Xiao-an;Mattern Frank;Ren Yan-guang;Z. Defeng;Sun Xiaomeng
摘要松辽盆地是一个具有两种不同充填类型的叠合盆地。下一层的特征是由穿插的火山岩、火山碎屑岩和表碎屑岩组成的断层边界火山构造序列。火山岩年龄为110 ~ 130 Ma，为地球化学活跃的大陆边缘型火山岩。根据其古地磁信息推断，在火山活动的主要时期，SB地块发生了快速北移。盆地上部充填物以非海相凹陷型沉积层序为主，主要为硅屑和少量碳酸盐岩。GGT地震速度结构显示早白垩世至晚白垩世盆地中心西移，表明盆地演化发生了动态变化。因此，提出了叠置盆地模型。SB的演化经历了三个时期：(1)阿普阗期和前阿普阗期：与蒙古-鄂霍次克碰撞带（mob）有关的弧后盆地和安第斯型山脉体系；(2)阿连—康连：沿欧亚板块东缘与太平洋板块斜俯冲有关的拉张下的凹陷状走滑盆地；(3)马斯特里赫特以来：与太平洋板块在欧亚板块下的正常俯冲有关的挤压构造逆盆地，以逆冲、沉积中心西移、盆地边缘东隆为特征。
Abstract: The Songliao basin (SB) is a superposed basin with two different kinds of basin fills. The lower one is characterized by a fault‐bounded volcanogenic succession comprising of intercalated volcanic, pyroclastic and epiclastic rocks. The volcanic rocks, dating from 110 Ma to 130 Ma, are of geochemically active continental margin type. Fast northward migration of the SB block occurred during the major episodes of the volcanism inferred from their paleomagnetic information. The upper one of the basin fill is dominated by non‐marine sag‐style sedimentary sequence of siliciclastics and minor carbonates. The basin center shifted westwards from the early to late Cretaceous revealed by the GGT seismic velocity structure suggesting dynamic change in the basin evolution. Thus, a superposed basin model is proposed. Evolution of the SB involves three periods including (1) Alptian and pre‐Aptian: a retroarc basin and range system of Andes type related to Mongolia‐Okhotsk collisional belt (MOCB); (2) Albian to Companian: a sag‐like strike‐slip basin under transtension related to oblique subduction of the Pacific plate along the eastern margin of the Eurasian plate; (3) since Maastrichtian: a tectonic inverse basin under compression related to normal subduction of the Pacific plate under the Eurasian plate, characterized by overthrust, westward migration of the depocenter and eastward uplifting of the basin margin.