The Permian-Triassic boundary Lung Cam expanded section, Vietnam, as a high-resolution proxy for the GSSP at Meishan, China

被引:0
|
作者
Ellwood, Brooks B. [1 ]
Nestell, Galina P. [2 ]
Luu Thi Phuong Lan [3 ]
Nestell, Merlynd K. [2 ]
Tomkin, Jonathan H. [4 ]
Ratcliffe, Kenneth T. [5 ]
Wang, Wei-Hsung [6 ]
Rowe, Harry [7 ]
Thanh Dung Nguyen [3 ]
Chien Thang Nguyen [3 ]
Tran Huyen Dang [8 ]
机构
[1] Louisiana State Univ, Dept Geol & Geophys, E235 Howe Russell Geosci Complex, Baton Rouge, LA 70803 USA
[2] Univ Texas Arlington, Dept Earth & Environm Sci, Arlington, TX 76019 USA
[3] Vietnamese Acad Sci & Technol, Inst Geophys, Hanoi, Vietnam
[4] Univ Illinois, Sch Earth Soc & Environm, 428 Nat Hist Bldg,1301 W Green St, Urbana, IL 61801 USA
[5] Chemostrat Inc, 3760 Westchase Dr, Houston, TX 77042 USA
[6] Louisiana State Univ, Ctr Energy Studies, 112 Nucl Sci Bldg, Baton Rouge, LA 70803 USA
[7] Premier Oilfield Labs, 11335 Clay Rd,Suite 180, Houston, TX 77041 USA
[8] Vietnam Union Geol Sci, Hanoi, Vietnam
基金
美国国家科学基金会;
关键词
Permian-Triassic boundary; time-series analysis; stable isotopic analysis; magnetic susceptibility; elemental geochemistry; graphic correlation; EIFELIAN-GIVETIAN GSSP; MAGNETIC-SUSCEPTIBILITY; MAGNETOSTRATIGRAPHY SUSCEPTIBILITY; MAGNETOSUSCEPTIBILITY EVENT; INTERNATIONAL-COMMISSION; ASTRONOMICAL CALIBRATION; CARBONATE PLATFORM; ANTI-ATLAS; MARINE; STRATIGRAPHY;
D O I
10.1017/S0016756819000566
中图分类号
P [天文学、地球科学];
学科分类号
07 ;
摘要
The Lung Cam expanded stratigraphic succession in Vietnam is correlated herein to the Meishan D section in China, the GSSP for the Permian-Triassic boundary. The first appearance datum of the conodont Hindeodus parvus at Meishan defines the Permian-Triassic boundary, and using published graphic correlation, the Permian-Triassic boundary level has been projected into the Lung Cam section. Using time-series analysis of magnetic susceptibility (chi) data, it is determined that H. parvus arrived at Lung Cam 18 kyr before the Permian-Triassic boundary. Data indicate that the Lung Cam section is expanded by 90 % relative to the GSSP section at Meishan. Given the expanded Lung Cam section, it is possible to resolve the timing of significant events during the Permian-Triassic transition with high precision. These events include major stepped extinctions, beginning at 135 kyr and ending at 110 kyr below the Permian-Triassic boundary, with a duration of 25 kyr, followed by deposition of Lung Cam ash Bed + 13, which is equivalent to Siberian Traps volcanism is graphically correlated to a precession Time-series model, placing onset of this major volcanic event at 242 kyr before the PTB. The Meishan Beds 25 and 26, at 100 kyr before the Permian-Triassic boundary. In addition, the elemental geochemical, carbon and oxygen isotope stratigraphy, and magnetostratigraphy susceptibility datasets from Lung Cam allow good correlation to other Permian-Triassic boundary succession. These datasets are helpful when the conodont biostratigraphy is poorly known in sections with problems such as lithofacies variability, or is undefined, owing possibly to lithofacies exclusions, anoxia or for other reasons. The Lung Pu Permian-Triassic boundary section, 45 km from Lung Cam, is used to test these problems.
引用
收藏
页码:65 / 79
页数:15
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