Skip to main content

The Late Cretaceous Middle Fork caldera, its resurgent intrusion, and enduring landscape stability in east-central Alaska

Dates

Publication Date

Citation

Bacon, C.R., Dusel-Bacon, C., Aleinikoff, J.N., and Slack, J.F., 2014, The Late Cretaceous Middle Fork caldera, its resurgent intrusion, and enduring landscape stability in east-central Alaska: Geosphere, v. 10, p. 1432–1455.

Summary

Dissected caldera structures expose thick intracaldera tuff and, uncommonly, cogenetic shallow plutons, while remnants of correlative outflow tuffs deposited on the pre-eruption ground surface record elements of ancient landscapes. The Middle Fork caldera encompasses a 10 km × 20 km area of rhyolite welded tuff and granite porphyry in east-central Alaska, ∼100 km west of the Yukon border. Intracaldera tuff is at least 850 m thick. The K-feldspar megacrystic granite porphyry is exposed over much of a 7 km × 12 km area having 650 m of relief within the western part of the caldera fill. Sensitive high-resolution ion microprobe with reverse geometry (SHRIMP-RG) analyses of zircon from intracaldera tuff, granite porphyry, and outflow tuff [...]

Contacts

Attached Files

Click on title to download individual files attached to this item.

metadata1805253304529417371.xml
Potential Metadata Source

View
5.58 KB application/mods+xml
Thumbnail
Thumbnail

Tags

Categories
Publication
Types

Provenance

Data source
Harvester
Harvested on Thu Feb 12 15:42:51 MST 2015 from MODS XML Service

Additional Information

Identifiers

Type Scheme Key
local-index unknown 70134557
local-pk unknown 70134557
doi http://www.loc.gov/standards/mods/mods-outline-3-5.html#identifier doi:10.1130/GES01037.1
series unknown Geosphere

Citation Extension

citationTypeArticle
journalGeosphere
languageEnglish
parts
typevolume
value10
typeissue
value6

Item Actions

View Item as ...

Save Item as ...

View Item...