45-9 Songalio Basin Hypervelocity Meteor Impact Event- Integration of the Ultra-deep Well Stress Data Northeastern China

Session: Surface Processes Across the Solar System (Posters)

Presenting Author:

Authors:

Abstract:

Hypervelocity bolide bombardments on Earth are a periodic process and the tectonic strains they impart are variable  resulting in a new state of punctuated tectonic equilibrium. The purpose of his presentation is to investigate the recent hypothesis by Buthman ( 2023) of  a Triassic hypervelocity impact crater forming the Songalio Basin, Northeastern China . This presenation is the second work presented at the GSA ( 2024),  concerning hypervelociy impacts effects on Chinese geology ( Ordos, Tarim, and Szechuan Basins).The primary basis is evidenced by satellite gravity exhibiting clear circular geometries, with radial wheel and spoke like geometries; and E-2 magnetics show simple high-susceptibility. The magnetics exhibit a 90 km transient crater, a 185 km inner ring, with calculated instantaneous energy of 3.62 times ten to the 23^rd joules,.

 The current tectonic basin model  Songalio Basin formed since the Middle Jurassic by the collisions between the Siberian-Middle Korean-paleo-Pacific plates, causing the deep asthenosphere to rise upward and the crust to thin and stretch.During the Early Cretaceous mantle uplift and strike-slip motion extensional stresses dominated the Songalio Basin ( Yang, 2021)

In Songalio’s Basin deepest borehole (SK-II, 7018m) anelastic strain data ( Wang e al., 2020) conclude the stress-state differences between the  basement and Cretaceous sedimentary cover  shows the maximum principal  basement as horizontal( strike -slip or thrust faults)  whereas the sedimentary cover as vertical (  normal faulting) .The  transition of principal  stress field from  compressional to extensional  exhibit the effects of a hypervelocity  impact, providing  an alternate hypothesis to the current theories regarding changes in tectonic plate motion  exclusively.

In the Songalio Basin ,volcanic gas reservoirs, originated  from Upper Triassic impact effects of crustal and  a upper mantle  reflected and rarefaction shock waves leading to tensile failure and magmatism, created  a  mantle bulge , further  may be enhanced by continued  deep subduction convection upwelling and Upper Cretaceous rifting (Xu e al., ,2023)  Earth’s moon impact geogravataional signature maps demonstrate widespread magmatic material around It’s craters The mantle bulge has significantly increased  the geothermal gradients 

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Geological Society of America Abstracts with Programs. Vol. 58, No. 2, 2026

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