Tithonian age of dinosaur fossils in central Patagonian, Chile: U-Pb SHRIMP geochronology

被引:4
|
作者
Suarez, Manuel [1 ]
De La Cruz, Rita [2 ]
Fanning, Mark [3 ]
Novas, Fernando [4 ]
Salgado, Leonardo [5 ]
机构
[1] Univ Andres Bello, Fac Ingn, Carrera Geol, Santiago 2315, Chile
[2] Serv Nacl Geol & Mineria, Ave Santa Maria, Santiago 0104, Chile
[3] Australian Natl Univ, Res Sch Earth Sci, Canberra, CT 0200, Australia
[4] Museo Argentino Ciencias Nat Bernardino Rivadavia, Buenos Aires, DF, Argentina
[5] Univ Nacl Rio Negro, CONICET, Inst Invest Paleobiol & Geol, Ave Gral JA Roca 1242, RA-8332 Gen Roca, Rio Negro, Argentina
关键词
U-Pb; Tithonian; Dinosaurs; Chilesaurus diegosuarezi gen. et sp nov; Patagonia; Chile; CORDILLERA; BASIN;
D O I
10.1007/s00531-015-1287-7
中图分类号
P [天文学、地球科学];
学科分类号
07 ;
摘要
Three Tithonian concordant U-Pb SHRIMP zircon ages of 148.7 +/- A 1.4, 147.9 +/- A 1.5 and 147.0 +/- A 1.0 from tuffs intercalated in a clastic sedimentary succession with exceptional dinosaur bones including the new taxon Chilesaurus diegosuarezi gen. et sp. nov. exposed in central Chilean Patagonia (ca. 46A degrees 30'S) are reported herein. The fossiliferous beds accumulated in a synvolcanic fan delta reaching a shallow marine basin as indicated by glauconite present in some of the beds, and coeval with the beginning of the transgression of the Ays,n Basin.
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页码:2273 / 2284
页数:12
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