Late Mesozoic transgressions of eastern Heilongjiang and their significance in tectonics, and coal and oil accumulation in northeast China
Late Mesozoic transgressions of eastern Heilongjiang and their significance in tectonics, and coal and oil accumulation in northeast China
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DOI：
10.1016/j.palaeo.2008.02.008
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发表时间：
2008-06
期刊：
影响因子：
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通讯作者：
J. Sha;H. Hirano;X. Yao;Yan-Hong Pan
中科院分区：
文献类型：
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作者：
J. Sha;H. Hirano;X. Yao;Yan-Hong Pan
黑龙江东部晚中生代海相和咸水沉积物的时空分布记录了三个主要的海侵间期：中卡洛世晚期—瓦兰吉阶、巴列姆—阿普第阶和阿尔布阶海侵期。卡洛夫—瓦兰吉阶海侵仅限于黑龙江东部的东北角，其他海侵沿云山浅海湾断断续续地向西北、西南和向西延伸，向西北古太平洋开放并加深。它们不仅淹没了海湾周围几乎所有的沉降盆地，而且在海侵高峰期间还广泛淹没了黑龙江东部以外的地区，例如中国东北部沿郯庐断裂系的延吉、北票-阜新和松辽盆地。所有的海侵都来自西北部的古太平洋，也可能来自北冰洋。除海平面升降变化外，中国东北地区早白垩世晚期的海侵与郯庐断裂系和环古太平洋的构造运动密切相关，这些构造运动非常明显，并与强烈的火山活动和持续沉降密切相关。早白垩世晚期，黑龙江东部海港的长期存在，以及东北地区郯庐断裂带的连续海侵和洪水，使得东北地区气候湿润。这些海侵和气候条件在沼泽和湖沼环境中产生了许多大面积且持久的沼泽和沼泽地。茂盛的植物和繁盛的动物生长导致沉积物中积累了丰富的有机质。黑龙江东部、吉林东部延吉盆地、辽西北票—阜新盆地、松辽盆地等地区形成了一批早白垩世晚期煤盆地和油田。
The spatial and temporal distribution of Late Mesozoic marine and brackish-water sediments in eastern Heilongjiang records three main transgressive interludes: The late Middle Callovian–Valanginian, Barremian–Aptian and Albian marine invasion phases. The Callovian–Valanginian transgressions were limited to the northeastern corner of eastern Heilongjiang, but the others intermittently extended northwest-, southwest- and westwards along the Yunshan shallow embayment, which opened into and deepened towards the northwestern Palaeo-Pacific. They not only flooded almost all of the subsiding basins surrounding the embayment, but during peak transgressions also widely flooded areas outside eastern Heilongjiang, such as the Yanji, Beipiao–Fuxin and Songliao basins along the Tan–Lu fault system of northeast China. All the transgressions came from the northwestern Palaeo-Pacific Ocean, and probably the Arctic Sea as well. In addition to the eustatic sea level changes, the late Early Cretaceous transgressions of northeast China were closely related to the tectonic movements within the Tan–Lu fault system and the circum-Paleo-Pacific, which were very pronounced and went hand in hand with a strong volcanic activity and ongoing subsidence. During the late Early Cretaceous, the long-term existence of a marine embayment in eastern Heilongjiang, successive marine transgressions, and flooding along the Tan–Lu fault system in northeast China ensured a humid climate across all of northeast China. These transgression and climatic conditions produced a number of extensive and long-lasting swamps and marsh lands in both paralic and limnic environments. Luxuriant plant and thriving animal growth led to the accumulation of abundant organic matter in the deposits. As a result, a number of late Early Cretaceous coal basins and oil fields formed in eastern Heilongjiang, the Yanji basin of eastern Jilin, Beipiao–Fuxin basin of western Liaoning, and the Songliao basin, northeast China.