河南南召盆地上三叠统太山庙组软沉积物变形构造及其古地理意义

发布时间：2018-11-25 14:46

【摘要】：河南南召盆地上三叠统太山庙组中发现的软沉积物变形构造包括同沉积断层、液化均一层与泄水脉、底劈构造、塑性变形层、碎裂岩及大型负载构造。它们集中保存在太山庙组中段深湖环境中,以该层段为界,其下水体渐深,其上水体渐浅。多数软沉积物变形构造与浊流沉积砂体相伴生,也可保存在泥岩层中,其形成可能与浊流沉积过程相关,但古地震活动是主要的触发机制。软沉积物变形的类型包括液化变形、塑性变形和脆性变形,指示了高强度的古地震活动,记录了秦岭造山带印支期一次强烈的造山活动。造山带逆冲推覆作用造成南召盆地的抬升,代表了前陆盆地系统中的楔顶沉积。
[Abstract]:The soft sediment deformation structures found in the Upper Triassic Taishanmiao formation in Nanzhao Basin, Henan Province include synsedimentary faults, liquefaction one layer and drainage vein, bottom wedge structure, plastic deformation layer, cataclastic rock and large load structure. They are concentrated in the deep lake environment of the middle section of the Taishanmiao formation. Most of the soft sediment deformation structures are associated with turbidite sedimentary sand facies and can also be preserved in mudstone beds. Their formation may be related to the turbidity deposition process, but paleoseismicity is the main trigger mechanism. The types of deformation of soft sediments include liquefaction deformation plastic deformation and brittle deformation indicating high intensity paleoseismicity and recording a strong orogenic activity during the Indosinian period in the Qinling orogenic belt. The uplift of Nanzhao basin caused by thrusting and nappe of orogenic belt represents the wedge top deposition in the Foreland basin system.
【作者单位】： 河南理工大学资源环境学院;
【基金】：国家自然科学基金项目(编号:41440016);国家自然科学基金青年科学基金(编号:41502106) 河南理工大学博士基金(编号:B2013-076)联合资助~~
【分类号】：P542;P534.51

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