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Earth Science Conservation Review
| Laghta Bridge, Tievenameena - Mineralogy | Tyrone |
| Site number: | 545 | ||
| ESCC: | EO | ||
| Locality Type: | River bed | Status: | local interest |
| Grid Reference: | H640884 Centroid | ||
| Google maps: | 54.73995,-7.00632 | ||
| County: | Tyrone | Council area: | Fermanagh & Omagh District Council |
| Site Description | |
|---|---|
 | |
| Highlights: | |
Two auriferous vein outcrops, one with base metal sulphides. | |
| Introduction: | |
The site comprises two vein occurrences (GR 264030 388400 and 264170 388430) that are of regional metallogenic interest (Earls et al., 1996). The eastern and western outcrops are located respectively 70m upstream of the bridge on the north bank, and 25m downstream of the bridge on the south bank. | |
| Description: | |
The western vein is a 0.5m wide fault and vein zone that includes a 5cm-wide galena-bearing vein. This outcrop would be sensitive to specimen collection. The eastern outcrop comprises pyritic vein quartz and brecciated psammitic wallrock that is exposed over a length of c.10m in river bed. Material is abundant and collecting is not an issue. Assay results indicate elevated (though sub-economic) concentrations of gold in both vein occurrences. Earls et al. (1996) report the occurrence of an iron arsenide (possibly gersdorffite) containing 1.2% Pb and 2.6% Au in Tievenameena vein material. | |
| Notes: | |
This site is complimentary to the more important metallogenic localities at Curraghinalt (Key Site 521) and Rylagh Burn (Key Site 522). See also SLNCI Key Site 735 - Laghta Bridge, Tievenameena. | |
| Keywords | |
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| Minerals: | Galena, Gold, Pyrite, Gersdorffite |
| Rocks: | Psammite |
| Structures: | hydrothermal vein |
| Access | |
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| Management: | |
The localities are easily accessed as they are close to a minor road with parking space, and as such are ideal to visit on field excursions. |
| Record type: | ESCR report | Recorded by: | R. Nawaz and N.R. Moles |
| Entered by: | E M Porter | ||
| Last updated: | 07 MAY 68 | ||
| Enlander, I., Dempster, M. & Doughty, P., 2026. Laghta Bridge, Tievenameena - Mineralogy, County Tyrone, site details. [In] Earth Science Conservation Review. https://www.habitas.org.uk/escr/site.php?item=545. Accessed on 2026-11-06. |
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