Cookies

We use cookies to ensure that we give you the best experience on our website. By continuing to browse this repository, you give consent for essential cookies to be used. You can read more about our Privacy and Cookie Policy.


Durham Research Online
You are in:

Direct radiometric dating of the Devonian-Mississippian time-scale boundary using the Re-Os black shale geochronometer.

Selby, D. and Creaser, R. A. (2005) 'Direct radiometric dating of the Devonian-Mississippian time-scale boundary using the Re-Os black shale geochronometer.', Geology., 33 (7). pp. 545-548.

Abstract

Many Phanerozoic time-scale boundaries are characterized by oceanic anoxia and mass extinction events with the deposition of black shale. The Re-Os isotope system in black shale can be used to provide depositional ages for these rocks, thus yielding direct radiometric ages for time-scale boundaries. We demonstrate that the Re-Os black shale geochronometer can yield precise ages useful for time-scale research through study of the Devonian-Mississippian boundary within the Exshaw Formation, Canada. The Re-Os date determined places the Devonian-Mississippian boundary at 361.3 ± 2.4 Ma (2σ including λ uncertainty, model 1, mean square of weighted deviates = 1.2), in accord with recent calibration interpolated from U-Pb zircon dates (360.7 ± 0.7 Ma) for the Hasselbachtal section, Germany.

Item Type:Article
Additional Information:Geological Society of America, P.O. Box 9140, Boulder, CO 80301-9140 USA (http://www.geosociety.org)
Keywords:Re-Os, Black shale, Geochronology, Devonian-Mississippian boundary.
Full text:Full text not available from this repository.
Publisher Web site:http://dx.doi.org/10.1130/G21324.1
Record Created:13 Mar 2007
Last Modified:08 Feb 2011 16:31

Social bookmarking: del.icio.usConnoteaBibSonomyCiteULikeFacebookTwitterExport: EndNote, Zotero | BibTex
Usage statisticsLook up in GoogleScholar | Find in a UK Library