| 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.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 |