The structural inventory of a small complex impact crater: Jebel Waqf as Suwwan, Jordan

The structural inventory of a small complex impact crater: Jebel Waqf as Suwwan, Jordan
复制标题

小型复杂撞击坑的结构清单:Jebel Waqf as Suwwan,约旦

DOI:
10.1111/maps.12823
复制
发表时间:
2017
影响因子:
2.2
通讯作者:
Konsul
Konsul
中科院分区:
地球科学3区
文献类型:
--
作者:
Kenkmann;Krüger;Salameh;Al-Raggad;Konsul

文献摘要

参考文献

被引文献

相似文献

对陆地撞击结构的调查对于深入了解太阳系的撞击坑过程是至关重要的。在这里,我们使用撞击构造Jebel Waqf as Suwwan,Jordan,作为陨石坑形成具有对比流变学的层状沉积目标的代表。复杂火山口为中度侵蚀(300-420米),视直径为6.1公里,原始边缘断层直径为7公里。在广泛的野外工作、IKONOS图像和地球物理测量的基础上,我们提出了整个陨石坑结构的新地质图,为结构分析提供了基础。参数标度表明,构造抬升(250-350米)和环向斜深度(200米)异常低。陨石坑的极浅起伏、不对称中央隆起的NE向收敛以及环形护城河和陨石坑边缘上、下部的变形增强,表明撞击很可能是非常倾斜的(~20°)。流变各向异性目标的存在的主要后果之一是,在撞击过程中发生了广泛的地层屈曲,既有分米级的,也有数百米级的。火山口边缘的定义是一条主要向火山口倾斜的周向正断层。边缘断层下方的下盘岩层在下部地段呈弯曲状,但在上部地段似乎不受影响。悬壁在下部显示各种合成旋转和对偶旋转,但在上部总是显示对偶块旋转。在更深处,边缘有逆断层或褶皱作用,表明边缘断裂在开挖阶段就已经形成。
The investigation of terrestrial impact structures is crucial to gain an in‐depth understanding of impact cratering processes in the solar system. Here, we use the impact structure Jebel Waqf as Suwwan, Jordan, as a representative for crater formation into a layered sedimentary target with contrasting rheology. The complex crater is moderately eroded (300–420 m) with an apparent diameter of 6.1 km and an original rim fault diameter of 7 km. Based on extensive field work, IKONOS imagery, and geophysical surveying we present a novel geological map of the entire crater structure that provides the basis for structural analysis. Parametric scaling indicates that the structural uplift (250–350 m) and the depth of the ring syncline (<200 m) are anomalously low. The very shallow relief of the crater along with a NE vergence of the asymmetric central uplift and the enhanced deformations in the up‐range and down‐range sectors of the annular moat and crater rim suggest that the impact was most likely a very oblique one (~20°). One of the major consequences of the presence of the rheologically anisotropic target was that extensive strata buckling occurred during impact cratering both on the decameter as well as on the hundred‐meter scale. The crater rim is defined by a circumferential normal fault dipping mostly toward the crater. Footwall strata beneath the rim fault are bent‐up in the down‐range sector but appear unaffected in the up‐range sector. The hanging wall displays various synthetic and antithetic rotations in the down‐range sector but always shows antithetic block rotation in the up‐range sector. At greater depth reverse faulting or folding is indicated at the rim indicating that the rim fault was already formed during the excavation stage.
约旦 Suwwan 陨石坑的 Waqf:陨石坑形成和重力数据的数值模拟
DOI: --
发表时间: 2011
期刊:
影响因子: --
作者:
K. Wünnemann;H. Kuhn;P. Janle;T. Kenkmann
通讯作者: T. Kenkmann
探索剪切在倾斜撞击中的作用:平面目标的实验结果与数值结果的比较
DOI: --
发表时间: 2011
期刊:
影响因子: --
作者:
A. Stickle;P. Schultz
通讯作者: P. Schultz
简单陨石坑中的不对称特征作为倾斜撞击方向的指示
DOI: --
发表时间: 2008
期刊:
影响因子: --
作者:
M. Poelchau;T. Kenkmann
通讯作者: T. Kenkmann
萨卡尔:沙特阿拉伯直径 34 公里的撞击结构
DOI: 10.1111/maps.12555
发表时间: 2015
影响因子: 2.2
作者:
T. Kenkmann;A. Afifi;S. Stewart;M. Poelchau;D. Cook;A. S. Neville
通讯作者: A. S. Neville
弗里德堡撞击构造地质学:感兴趣地点指南,作者:Roger L. Gibson 和 Wolf Uwe Reimold
DOI: --
发表时间: 2009
期刊:
影响因子: --
作者:
J. Morrow
通讯作者: J. Morrow