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Earth Science Conservation Review
| Laghta Bridge, Tievenameena - site of local interest | Tyrone |
| Site number: | 735 | ||
| 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: | |
The site comprises two vein occurrences [H640 884] and [H642 884], one with base metal sulphides. | |
| Description: | |
The site comprises two vein occurrences [H640 884] and [H642 884], 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. 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 the river bed. Material is abundant and collecting is not an issue. Assay results indicate elevated (though sub-economic) concentrations of gold in both veins. 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. | |
| Importance: | |
These sites are of scientific significance as they comprise two vein occurrences and are complimentary to nearby mineralisation at Curraghinalt (ESCR Key Site 521) and Cashel Rock (ESCR Key Site 523). The site is of significant educational value to researchers of mineralisation. 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. | |
| Notes: | |
See also ESCR Key Site 545 - Laghta Bridge, Tievenameena [Mineralogy and Metallogenesis Block]. | |
| Keywords | |
|---|---|
| Minerals: | Galena, Gold, Pyrite, Gersdorffite |
| Rocks: | Psammite |
| Structures: | fault, hydrothermal vein |
| Access | |
|---|---|
| Approach: | This site is located 4km northeast of Glenhull. |
| Uses | |
| Educ. Level: | The site is of significant educational value to researchers of mineralisation. |
| Record type: | SLNCI Report | ||
| Entered by: | E M Porter | ||
| Last updated: | 09/10/03 | ||
| Enlander, I., Dempster, M. & Doughty, P., 2026. Laghta Bridge, Tievenameena - site of local interest, County Tyrone, site details. [In] Earth Science Conservation Review. https://www.habitas.org.uk/escr/site.php?item=735. Accessed on 2026-11-06. |
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