Provenance and tectonic significance of the Lower Paleozoic Douglas Conglomerate, northern Churchill Mountains, Antarctica

The Douglas Conglomerate in the Churchill Mountains of Antarctica is a polymictic, unconformity-bounded unit whose age is poorly constrained between Late Cambrian and Devonian. Its source areas were local, including outcrops of Cambrian Shackleton Limestone, the craton of Greater Antarctica, and perhaps, terranes that lay outboard of the craton but subsequently were dispersed along transform faults; Petrographic analyses suggest a recycled orogen provenance for the Douglas Its depositional basin may have developed within a fold-and-thrust belt or along an active transform fault. Subsequent tectonism dismembered the formation, but its composition suggests the basin had fault-controlled margins walled within Shackleton Limestone and numerous simultaneously active depositional systems; Although the Douglas crops out within the trend of Cambro-Ordovician granitic batholiths it does not record the unroofing of these plutons. Therefore, it is probably older than the intrusives and was deposited in response to an earlier tectonic event.

Name thesis:degree_name

Master of Science (MS)

Level thesis:degree_level

Thesis

Discipline thesis:degree_discipline

Geoscience

Grantor dc:publisher

University of Nevada, Las Vegas

Year

1997

Author dc:creator

• Panttaja, Susan Kay

Contributors dc:contributor

• Margaret N. Rees

Statement dc:rights

• IN COPYRIGHT. For more information about this rights statement, please visit http://rightsstatements.org/vocab/InC/1.0/

Language dc:language

English

Identifier

https://oasis.library.unlv.edu/rtds/8

OAI identifier oai:identifier

oai:oasis.library.unlv.edu:rtds-1007