THE AGE OF THE PERMIAN TRIASSIC BOUNDARY

被引：105
作者：
CLAOUELONG, JC [1 ]
ZHANG, ZC [1 ]
MA, GG [1 ]
DU, SH [1 ]
机构：
[1] YICHANG INST GEOL & MINERAL RESOURCES,YICHANG 443003,PEOPLES R CHINA
来源：
EARTH AND PLANETARY SCIENCE LETTERS | 1991年 / 105卷 / 1-3期
关键词：
D O I：
10.1016/0012-821X(91)90129-6
中图分类号：
P3 [地球物理学]; P59 [地球化学];
学科分类号：
0708 ; 070902 ;
摘要：
The 5 cm boundary clay bed in the Chinese stratotype section through the Permian-Triassic boundary has been recognised as a bentonite. SHRIMP ion microprobe dating of zircons in the bentonite indicates a magmatic age of 251.2 +/- 3.4 Ma (2-sigma); this is the first direct constraint on the numerical age of the Permian-Triassic boundary. Future refinements of ages at this important, but poorly constrained, level of the Phanerozoic timescale may depend on re-analysis of this uniquely placed volcanic horizon, and other bentonites in the fossiliferous Chinese Upper Permian and Lower Triassic. The utility of defining the Permian-Triassic boundary in the Chinese stratotype section, in the vicinity of known dateable horizons, should be considered.
引用
收藏
页码：182 / 190
页数：9
相关论文
共 21 条
[1]  
Anderson J.M., 1978, Palaeontologia Africana, V21, P15
[2]  
Compston W., 1984, J GEOPHYS RES, V89, pB525, DOI DOI 10.1029/JB089IS02P0B525
[3]   ORE LEAD ISOTOPE RATIOS IN A CONTINUOUSLY CHANGING EARTH [J].
CUMMING, GL ;
RICHARDS, JR .
EARTH AND PLANETARY SCIENCE LETTERS, 1975, 28 (02) :155-171
[4]  
DEJERSEY NJ, 1972, PUBL QLD GEOL SURV, V357, P1
[5]  
Ding M., 1988, Memorie della Societa Geologica Italiana, V34, P263
[6]  
FORSTER SC, 1985, GEOL SOC LONDON MEM, V10, P99
[7]  
Green D.C., 1974, TASMAN GEOSYNCLINE S, P275
[8]   HIGH-PRECISION RADIOMETRIC AGES FROM THE NORTHERN SYDNEY BASIN AND THEIR IMPLICATION FOR THE PERMIAN TIME INTERVAL AND SEDIMENTATION-RATES [J].
GULSON, BL ;
DIESSEL, CFK ;
MASON, DR ;
KROGH, TE .
AUSTRALIAN JOURNAL OF EARTH SCIENCES, 1990, 37 (04) :459-469
[9]  
Harland W. B., 1990, GEOLOGIC TIME SCALE
[10]  
IRWIN MJ, 1976, PAP DEP GEOL U QLD, V7, P46
123