Dating of syngenetic ice wedges in permafrost with 36Cl

被引：19

作者：

Gilichinsky, D. A. ^{[1
]}

Nolte, E.

Basilyan, A. E.

Beer, J.

Blinov, A. V.

Lazarev, V. E.

Kholodov, A. L.

Meyer, H.

Nikolskiy, P. A.

Schirrmeister, L.

Tumskoy, V. E.

机构：

[1] Russian Acad Sci, Soil Cryol Lab, Inst Physicochem & Biol Problems Soil Sci, Pushchino 142290, Russia

[2] Tech Univ Munich, Fac Phys E15, D-85747 Garching, Germany

[3] Russian Acad Sci, Inst Geol, Lab Quaternary Deposits, Moscow 119017, Russia

[4] EAWAG, Dept Environm Phys, CH-8600 Dubendorf, Switzerland

[5] Polytech Univ St Petersburg, Dept Cosm Res, St Petersburg 195251, Russia

[6] Alfred Wegener Inst Polar & Marine Res, Res Unit Potsdam, D-14473 Potsdam, Germany

[7] Moscow MV Lomonosov State Univ, Fac Geog, Dept Cryolithol & Glaciol, Moscow 119899, Russia

来源：

QUATERNARY SCIENCE REVIEWS | 2007年 / 26卷 / 11-12期

基金：

俄罗斯基础研究基金会;

关键词：

D O I：

10.1016/j.quascirev.2007.04.004

中图分类号：

P9 [自然地理学];

学科分类号：

0705 ; 070501 ;

摘要：

A new method of permafrost dating with the cosmogenic radionuclide Cl-36 is presented. In the first application, syngenetic ice wedges are dated using the ratio of Cl-36 and Cl concentrations in ice as the signal. Cl-36 is produced in the atmosphere by nuclear reactions of cosmic rays on argon. Stable chlorine enters the atmosphere from the oceans. Their ratio does not depend on chloride concentration in precipitations and on sublimation of snow. In situ production of Cl-36 in permafrost ice via cosmic ray-induced reactions and neutron capture are calculated and the dating age limit is estimated as 3 million years. Cl-36/Cl ratios in permafrost samples from cape Svyatoy Nos (Laptev Sea coast), North-Eastern Siberia, are measured by accelerator mass spectrometry. Analysis of the first results and the calculated dates support the feasibility of the Cl-36 permafrost dating method. (C)2007 Elsevier Ltd. All rights reserved.

引用

页码：1547 / 1556

页数：10

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