The structure is characterized by a gravity anomaly low of −35 mGal amplitude, one of the largest magnitude gravity anomalies associated with a terrestrial impact structure. Superimposed on the gravity low is a concentric ring-shaped high, ~45 km in diameter, that coincides with uplifted ...
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As this age is also similar to that of the North American tektites, which have been associated with the Chesapeake Bay impact structure in the eastern United States, there seem to have been at least two large and essentially contemporaneous impacts during the Late Eocene....
Popigai Impact Crater References [1] Impactites - Ghostly Footprints of Ancient Meteorites: Geoffrey Notkin, Meteorwritings, Geology.com, 2009. [2] U-Pb Analyses of Zircons from the Popigai Impact Structure, Russia: First Results: Richard Armstrong, Sergei Vishnevsky and Christian Koeberl, ...
We also use the magnetic anomalies from the model EMAG2 and emphasize the evidence of much deeper sources in the suspected area, constraining the impact origin of this structure.doi:10.1038/s41598-020-62998-6Jaroslav KlokoníkJan Kosteleck
The impact (cosmogenic) origin of this unique structure, as well as the Sudbury intrusive complex and ores therein, has been admitted by all researchers. In this respect, the Popigai astrobleme (100 km across) with the largest (except for the Sudbury astrobleme) volume of impact melting ...
The 35-Ma-old Popigai impact structure (about 100 km in diameter) is characterized by its good preservation state and exposure, and detailed investigations that were made through deep drilling and mapping. The present contribution shows data on the post-impact faulting in the Popigai crater that ...
G. 2002. Mineralogy and petrology of melt rocks from the Popigai impact structure, Siberia. Meteoritics & Planetary Science 37:623-647.Whitehead, J., R. A. F. Grieve, and J. G. Spray (2002), Mineralogy and petrology of melt rocks from the Popigai impact structure, Siberia, Meteorit. ...
G. 2002 . Mineralogy and petrology of melt rocks from the Popigai impact structure, Siberia . Meteoritics amp; Planetary Science 37 : 623 – 648 .Whitehead J., Grieve R. A. F., and Spray J. G. 2002. Mineralogy and petrology of melt rocks from the Popigai impact structure, Siberia. ...
A new analysis of Nd and Sr isotopic compositions confirms previous work and the assignment of the uppermost microtektite layer to the North American tektites, which are associated with the 35.5 Ma, 85 km diameter Chesapeake impact structure of Virginia, USA. Extensive major element and Nd and ...