Gravity field aspects for identification of cosmic impact structures on Earth
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985815%3A_____%2F22%3A00566815" target="_blank" >RIV/67985815:_____/22:00566815 - isvavai.cz</a>
Alternative codes found
RIV/61989100:27350/22:10251374
Result on the web
<a href="http://dx.doi.org/10.1130/2021.2553(21)" target="_blank" >http://dx.doi.org/10.1130/2021.2553(21)</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1130/2021.2553(21)" target="_blank" >10.1130/2021.2553(21)</a>
Alternative languages
Result language
angličtina
Original language name
Gravity field aspects for identification of cosmic impact structures on Earth
Original language description
We studied the following proven as well as hypothetical impact craters (among others), and some of the relevant results are reviewed in this chapter: (1) a hypothetical impact structure in Saginaw Bay, Great Lakes, Michigan, (2) a putative impact crater basin under the ice of Antarctica in Wilkes Land, (3) two recently discovered subglacial impact craters in Greenland, (4) a possible huge impact crater in Kotuykanskaya in a remote area of Siberia near the proven impact crater Popigai, and (5) a hypothetical impact object Burckle on the bottom of the Indian Ocean. They were tested using the gravity data derived from the recent gravity field model EIGEN 6C4 (with ground resolution of similar to 9 km). Our method is novel, we introduce gravity aspects (descriptors) to augment traditional gravity anomalies. The following gravity aspects were used: (a) gravity disturbances/anomalies, (b) second derivatives of the disturbing potential (the Marussi tensor), (c) two of three gravity invariants, (d) their specific ratio (known as 2D factor), (e) strike angles, and (f) virtual deformations. These gravity aspects are sensitive in various ways to the underground density contrasts. They describe the underground structures (not only the craters) more carefully and in more detail than the traditional gravity anomalies could do alone. Our results support geological evidence of the impact craters found by others in many cases or suggest new impact places for further study.
Czech name
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Czech description
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Classification
Type
C - Chapter in a specialist book
CEP classification
—
OECD FORD branch
10508 - Physical geography
Result continuities
Project
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Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2022
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Book/collection name
In the Footsteps of Warren B. Hamilton: New Ideas in Earth Science
ISBN
978-08-1372-553-6
Number of pages of the result
10
Pages from-to
251-260
Number of pages of the book
434
Publisher name
Geological Society of America
Place of publication
Boulder
UT code for WoS chapter
000891146500022