The Deniliquin multiple-ring feature is a distinct deeply buried structure in southeast Australia. It is named after the town of Deniliquin. Its characteristics suggest that it is associated with an asteroidimpact structure of diameter Шаблон:Cvt, which would make it the largest one on Earth, exceeding the largest known one, the Vredefort impact structure of about Шаблон:Cvt in diameter.[1][2]
It is located beneath the Murray Sedimentary Basin and partly beneath the Darling Sedimentary Basin , and centered about Шаблон:Cvt northwest of Deniliquin. The principal features of the Deniliquin structure are a multiple ring total magnetic intensity (TMI) pattern with the minimal TMI ring radius of Шаблон:Cvt; a central quiet magnetic zone; circular Bouguer gravity patterns; an underlying mantleMoho rise about Шаблон:Cvt shallower than under the adjacent TasmanOrogenic belt; and radial faults associated with magnetic and demagnetized anomalies. The above features suggest that the Deniliquin feature is a root zone of a large impact structure, a multi-ring impact basin.[3] Its existence was proposed by Anthony Yeates somewhere between 1995 and 2000, basing in the magnetic patterns in the area.[1] A 2022 paper by Glikson and Yeates further supports this suggestion basing on recent geophysical data, drill-hole samples and airborne magnetic data.[3]Шаблон:As of most evidence comes from the surface data. Further confirmation of the suggestion would require further deep drilling.[1]
