The Slate Islands Impact Structure: Structural Interpretation and Age Constraints

Details The Slate Islands Impact Structure: Structural Interpretation and Age Constraints The Slate Islands Impact Structure: Structural Interpretation and Age Constraints

Mar 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996lpi....27.1177s&link_type=abstract

Lunar and Planetary Science, volume 27, page 1177

Computer Science

Craters: Impact, Slate Islands, Terrace Zone, Uplift: Central

Scientific paper

The ~7-km-wide Slate Islands group, located in northern Lake Superior ~10 km south of Terrace Bay, Ontario, represents the heavily eroded central portion of a complex impact crater. Bathymetric data suggest an original crater diameter of ~32 km. Macroscopic and microscopic shock metamorphic features are common expressions within the Archean-to-Proterozoic igneous, metamorphic, and sedimentary target complex. Field studies conducted over the last two years reveal that the islands preserve not only the uplifted basement of the central structure, as previously recognized, but also allogenic breccia deposits of the original peripheral trough. Allogenic breccias are particularly prevalent along the eastern and northern island exposures. Heterogeneous melt bodies are located within heavily brecciated units of the central uplift. The intensely deformed structural trough and rim zone are evident on the N-S GLIMPCE reflection seismic line traversing the crater ~7 km to the west of the crater center. Currently available age constraints are weak but the apparent lack of post-Jacobsville clasts in the preserved breccia units suggests a Late Proterozoic-Early Paleozoic (800-500 Ma) age. Isotopic analyses of melt rocks, essential for refining the production age of this impact crater are currently underway.

Affiliated with

Also associated with

No associations

Rating

The Slate Islands Impact Structure: Structural Interpretation and Age Constraints does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with The Slate Islands Impact Structure: Structural Interpretation and Age Constraints, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The Slate Islands Impact Structure: Structural Interpretation and Age Constraints will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1614395