Peering inside the peak ring of the Chicxulub Impact Crater-its nature and formation mechanism
Peering inside the peak ring of the Chicxulub Impact Crater-its nature and formation mechanism
复制标题
窥探希克苏鲁伯陨石坑峰环内部——其性质和形成机制
DOI：
10.1111/gto.12261
复制
发表时间：
2019
期刊：
影响因子：
--
通讯作者：
Urrutia-Fucugauchi J
中科院分区：
文献类型：
--
作者：
Urrutia-Fucugauchi J
IODP-ICDP 364 号探险队钻入希克苏鲁伯陨石坑，观察其保存完好的峰环内部。钻孔穿透了峰环顶部的一系列冲击后碳酸盐岩和一个硫石榴石单元以及贫碎屑冲击熔岩。在此层序之下，在浅深度遇到了被预撞击和撞击岩脉切割的基底岩石，以及角砾岩和融化物。基底岩石发生破裂、冲击和隆起，与瞬态空腔塌陷和最终火山口形成过程中弱化物质的动态塌陷、隆起和长距离迁移一致。
The IODP-ICDP Expedition 364 drilled into the Chicxulub crater, peering inside its well-preserved peak ring. The borehole penetrated a sequence of post-impact carbonates and a unit of suevites and clast-poor impact melt rock at the top of the peak ring. Beneath this sequence, basement rocks cut by pre-impact and impact dykes, with breccias and melt, were encountered at shallow depths. The basement rocks are fractured, shocked and uplifted, consistent with dynamic collapse, uplift and long-distance transport of weakened material during collapse of the transient cavity and final crater formation.