K/T boundary: Discussion of the platinum group elements as indicators of extraterrestrial materials |
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Authors: | Quanlin Hou Peixue Ma Xin Ju |
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Institution: | (1) Laboratory of Lithosphere Tectonic Evolution, Institute of Geology, Chinese Academy of Sciences, 100029 Beijing, China;(2) AMS Laboratory, Institute of Heavy Ion Physics, Peking University, 100871 Beijing, China;(3) Institute of High Energy Physics, Chinese Academy of Sciences, 100039 Beijing, China |
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Abstract: | Whether the platinum group elements (PGE) can be taken as the indicators of extraterrestrial materials is a very important
and interesting scientific problem. It is discussed on the basis of systematic investigation and study of a great amount of
related literature. The following conclusions can be obtained: (i) extraterrestrial impact event can cause the PGE anomaly;
conversely, the PGE anomaly may not represent the existence of extraterrestrial impact event, because the PGE anomaly can
be caused by many terrestrial events (e. g. volcanic activity); (ii) the PGE anomaly, especially the global PGE anomaly can
inspire us to think it from extraterrestrial event, but it may not be as useful as previously thought as unambiguous identifiers
of large extraterrestrial impact event in the earth’s history. |
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Keywords: | platinum group elements (PGE) extraterrestrial Impact event K/T boundary |
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