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Population polygons of tektite specific gravity for various localities in Australasia
Affiliation:1. Sibley School of Mechanical and Aerospace Engineering, Field of Theoretical & Applied Mechanics, Cornell University, Ithaca, NY 14853, United States;2. Laboratoire Sciences et Ingénierie de la Matière Molle, PSL Research University, UPMC Univ Paris 06, ESPCI Paris, CNRS, 10 rue Vauquelin, Paris, Cedex 05 75231, France;3. Global Station for Soft Matter, Global Institution for Collaborative Research and Education, Hokkaido University, Sapporo, Japan;1. School of Geosciences, China University of Petroleum, Qingdao 266580, China;2. State Key Laboratory of Shale Oil and Gas Enrichment Mechanisms and Effective Development, SINOPEC, Beijing 100083, China;3. Petroleum Exploration and Production Research Institute, SINOPEC, Beijing 100083, China;4. Reseach Institute of Shaanxi Yanchang Petroleum (Group) Co., Ltd., Xi''an 710075, China;1. School of Economics, Finance & Marketing, RMIT University, Australia;2. Pakistan Institute of Development Economics (PIDE), Pakistan;3. Department of Economics, COMSATS University Islamabad, Pakistan;4. Department of Economics, Monash University, Australia
Abstract:Measurements of specific gravity by the method of liquid flotation have been made on about 6000 tektites from 18 different localities in Australasia, from 1 locality in Texas and 2 in Czechoslovakia. Comparison of specific-gravity population polygons for various localities has led to the unanticipated conclusion that the australite population in southwest Australia is essentially the same as the philippinite population, rather than the population elsewhere in Australia. The javanite population appears closely related to certain populations in Australia. In several localities the presence of two superimposed populations is demonstrated. The specific-gravity evidence indicates that the Australasian tektites represent a single event comprising many distinguishable clusters, some of which have partially overlapped.
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