Estimates for Peak Shock Pressure Based on Analyses of Planar Deformation Features (PDFs) of Shocked Quartz Grains in the Chicxulub Crater and Constraints on Ejecta Depositional Processes.

DOI

Bibliographic Information

Other Title
  • チクシュルーブ・クレーター内部の衝撃変成石英の平面変形構造(PDFs)分析に基づくイジェクタ経験圧力推定及び堆積過程の制約

Description

In this study, we report vertical profile of the shocked quartz grains to constraint the depositional processes of impactite of the YAX-1 core. We analyzed both the grain size distribution and planar deformation features (PDFs) on shocked quartz contained in the impactite of the YAX-1 core. We examined characteristics and vertical profiles of PDFs along with the YAX-1 core to discuss the excavation, transport, and depositional processes of each impactite unit of the YAX-1 core. We found that, in the middle part of impact melt layer (Unit 5), shocked quartz grains were dominated high shocked grains. These results suggest that unit 5 is likely to have been formed by an outward flow of impact melt-sheet from the transient crater cavity during the collapse of the central uplift and transient crater. In unit 1, i.e., the uppermost impactite unit, both the grain size and shocked quartz abundance profiles show cyclic variations in unit 1, which suggest water invasions into the crater.<br>

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Keywords

Details 詳細情報について

  • CRID
    1390845713059013248
  • NII Article ID
    130007616832
  • DOI
    10.14824/jakoka.2014.0_215
  • Text Lang
    ja
  • Data Source
    • JaLC
    • CiNii Articles
  • Abstract License Flag
    Disallowed

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