Dating diagenetic monazite in mudrocks: constraining the oil window?

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dc.contributor.author Evans, J. A.
dc.contributor.author Zalasiewicz, J. A.
dc.contributor.author Rasmussen, B.
dc.contributor.author Fletcher, I.
dc.contributor.author Pearce, Nicholas J. G.
dc.date.accessioned 2011-09-06T11:34:08Z
dc.date.available 2011-09-06T11:34:08Z
dc.date.issued 2011-09-06
dc.identifier.citation Evans , J A , Zalasiewicz , J A , Rasmussen , B , Fletcher , I & Pearce , N J G 2011 , ' Dating diagenetic monazite in mudrocks: constraining the oil window? ' Journal of the Geological Society , pp. 619-622 . en
dc.identifier.issn 2041-479X
dc.identifier.other PURE: 170484
dc.identifier.other dspace: 2160/7559
dc.identifier.uri http://hdl.handle.net/2160/7559
dc.description Evans, J. A., Zalasiewicz, J. A., Fletcher, I., Rasmussen, B., Pearce, N. J. G. (2002). Dating diagenetic monazite in mudrocks: constraining the oil window?. Journal of the Geological Society, 519 (6), 619-622. en
dc.description.abstract Authigenic monazite nodules, increasingly recognized in Pre-Mesozoic mudrock successions, provide a means for dating diagenesis by exploiting trace uranium within the monazite structure. But, dating is difficult in practice because of zonation and abundant host rock inclusions. We report here a refined technique that has yielded a date of 419 +/- 14 Ma 2sigma MSWD = 1.2 for a 17-point Pb-Pb regression age from a Telychian (Silurian: late Llandovery) mudrock from central Wales. SHRIMP analyses of monazite nodules from the same horizon are consistent with this, and additionally demonstrate concordance of the U-Pb and Th-Pb systems. These results open the door to providing robust dates for a phase of burial-related diagenesis which, in Wales, seems approximately coincident with, and perhaps was related to, hydrocarbon expulsion. en
dc.format.extent 4 en
dc.language.iso eng
dc.relation.ispartof Journal of the Geological Society en
dc.title Dating diagenetic monazite in mudrocks: constraining the oil window? en
dc.type Text en
dc.type.publicationtype Article (Journal) en
dc.contributor.institution Institute of Geography & Earth Sciences en
dc.contributor.institution Other IGES Research en
dc.description.status Peer reviewed en


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