Authigenic potassium feldspar in Cambrian carbonates: Evidence of Alleghanian brine migration
Science
By: Paul P. Hearn Jr. and John F. Sutter
Links
- More information: Publisher Index Page (via DOI)
- Download citation as: RIS | Dublin Core
Abstract
The shallow-water limestones and dolostones of the Conococheague Limestone (Upper Cambrian) of western Maryland contain large amounts of authigenic potassium feldspar. The presence of halite daughter crystals in breached fluid inclusions, low whole-rock ratios of chlorine to bromine, and thermochemical data suggest that the potassium feldspar formed at low temperature by the reaction of connate brines with intercalated siliciclastic debris. Analyses of argon age spectra indicate that the authigenic feldspar probably formed during Late Pennsylvanian to Early Permian time. These results may indicate mobilization and migration of connate brines brought about by Alleghanian folding. The widespread occurrence of authigenic potassium feldspar in Cambrian and Ordovician carbonate rocks throughout the Appalachians suggests that this may have occurred throughout the entire basin.
Suggested Citation
Hearn, P., Sutter, J.F., 1985, Authigenic potassium feldspar in Cambrian carbonates: Evidence of Alleghanian brine migration: Science, v. 228, no. 4707, p. 1529-1531, https://doi.org/10.1126/science.228.4707.1529.
Study Area
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | Authigenic potassium feldspar in Cambrian carbonates: Evidence of Alleghanian brine migration |
| Series title | Science |
| DOI | 10.1126/science.228.4707.1529 |
| Volume | 228 |
| Issue | 4707 |
| Year Published | 1985 |
| Language | English |
| Publisher | American Association for the Advancement of Science |
| Description | 3 p. |
| First page | 1529 |
| Last page | 1531 |
| Country | United States |
| State | Maryland |
| Other Geospatial | western Maryland |