uu.seUppsala University Publications
Change search
ReferencesLink to record
Permanent link

Direct link
Fossil diagenesis in the Burgess Shale
Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences, Palaeobiology.
2007 (English)In: Palaeontology, ISSN 0031-0239, E-ISSN 1475-4983, Vol. 50, no 3, 537-543 p.Article in journal (Refereed) Published
Abstract [en]

Current models for the exceptional preservation of Burgess Shale fossils have focused on either the HF-extractable carbonaceous compressions or the mineral films identified by elemental mapping. BSEM, EDX and microprobe analysis of two-dimensionally preserved Marpolia, Wiwaxia and Burgessia identifies the presence of both carbonaceous and aluminosilicate films for most features, irrespective of original lability. In the light of the deep burial and greenschist facies metamorphism documented for the Burgess Shale, the aluminosilicate films are identified as products of late-stage volatilization and coincident mineralization of pre-existing compression fossils, whereas the three-dimensionally preserved gut-caecal system of Burgessia is interpreted as an aluminosilicate replacement of a pre-existing carbonate phase. The case for late diagenetic emplacement of aluminosilicate minerals is supported by the extensive aluminosilicification of trilobite shell and (originally) calcareous veinlets in the Burgess Shale, as well as documentation of other secondarily aluminosilicified compression fossils. By distinguishing late diagenetic alteration from the early diagenetic processes responsible for exceptional preservation, it is possible to reconcile the range of preservational modes currently expressed in the Burgess Shale.

Place, publisher, year, edition, pages
2007. Vol. 50, no 3, 537-543 p.
Keyword [en]
Taphonomy, Cambrian, diagenesis, metamorphism, aluminosilicates
National Category
Earth and Related Environmental Sciences
URN: urn:nbn:se:uu:diva-11071DOI: 10.1111/j.1475-4983.2007.00656.xISI: 000246624300001OAI: oai:DiVA.org:uu-11071DiVA: diva2:38839
Available from: 2007-05-21 Created: 2007-05-21 Last updated: 2011-01-31Bibliographically approved

Open Access in DiVA

No full text

Other links

Publisher's full text

Search in DiVA

By author/editor
Balthasar, Uwe
By organisation
In the same journal
Earth and Related Environmental Sciences

Search outside of DiVA

GoogleGoogle Scholar
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

Altmetric score

Total: 188 hits
ReferencesLink to record
Permanent link

Direct link