Skip to Main Content
Book Chapter

Original diameter and depth of erosion of the Popigai impact crater, Russia

By
V.L. Masaitis
V.L. Masaitis
Karpinsky Geological Institute, 199106 Sredny prospekt 74, St. Petersburg, Russiavictor_masaitis@vsegei.ru
Search for other works by this author on:
M.V. Naumov
M.V. Naumov
Karpinsky Geological Institute, 199106 Sredny prospekt 74, St. Petersburg, Russia
Search for other works by this author on:
M.S. Mashchak
M.S. Mashchak
Karpinsky Geological Institute, 199106 Sredny prospekt 74, St. Petersburg, Russia
Search for other works by this author on:
Published:
January 01, 2005

Previous and recent geological, topographic, drilling, and geophysical data are summarized to acknowledge the 100 km original size of the relatively young and well-preserved multi-ring Popigai impact structure and to estimate the depth of its erosion. The relics of the bedrock rim are traced in the northern and western sectors of the crater, allowing the correct evaluation of the crater diameter. The depth of erosion varies in different crater sectors and concentric zones from 50 to 100 m to 300 m. The most significant erosion occurred on the crater rim. The crater rim has a complex inner structure and is composed of outwardly dragged and uplifted blocks of target rocks overlain by ejecta. During the 35 m.y. that have passed after the crater formation, ∼1000–1200 km3 of unconsolidated allogenic breccias were eroded from the ejecta blanket on the crater rim and from the upper layers of breccias and suevites of the central depression.

You do not currently have access to this article.

Figures & Tables

Contents

GSA Special Papers

Large Meteorite Impacts III

Thomas Kenkmann
Thomas Kenkmann
Search for other works by this author on:
Friedrich Hörz
Friedrich Hörz
Search for other works by this author on:
Alex Deutsch
Alex Deutsch
Search for other works by this author on:
Geological Society of America
Volume
384
ISBN print:
9780813723846
Publication date:
January 01, 2005

GeoRef

References

Related

Citing Books via

Close Modal
This Feature Is Available To Subscribers Only

Sign In or Create an Account

Close Modal
Close Modal