Abstract
A detailed petrographic, mineralogical and sedimentological study has been made of five drift sediment cores taken from shallow boreholes at Drigg, Cumbria, forming part of the British Geological Survey`s migration test borehole array. The cores correspond to the aquifer in which tests are undertaken. The study shows that several discrete units can be recognised within the aquifer but that these may vary laterally by a considerable amount over short distances. The sands and silts comprising the aquifer zone are generally finely laminated and show an upwards coarsening of grain size. They are interpreted as proximal glacial sediments, possibly having been deposited in a lake or ponded basin. Petrographic analysis shows that most of the porosity is lined by detrital ferruginous illitic clay which coats the sand grains. Some evidence of feldspar dissolution is identified. Pyrite is also present as an important detrital component. In the upper part of the aquifer the pyrite has been largely oxidised to form secondary ferric oxide compounds. However, pyrite increases in abundance with depth and its preservation may reflect a variation in redox across the aquifer. (author).
Milodowski, A E
[1]
- British Geological Survey, Keyworth (United Kingdom)
Citation Formats
Milodowski, A E.
Petrographic and sedimentological characteristics of drift sediments from the radiotracer experiment array at Drigg, Cumbria.
United Kingdom: N. p.,
1990.
Web.
Milodowski, A E.
Petrographic and sedimentological characteristics of drift sediments from the radiotracer experiment array at Drigg, Cumbria.
United Kingdom.
Milodowski, A E.
1990.
"Petrographic and sedimentological characteristics of drift sediments from the radiotracer experiment array at Drigg, Cumbria."
United Kingdom.
@misc{etde_10128099,
title = {Petrographic and sedimentological characteristics of drift sediments from the radiotracer experiment array at Drigg, Cumbria}
author = {Milodowski, A E}
abstractNote = {A detailed petrographic, mineralogical and sedimentological study has been made of five drift sediment cores taken from shallow boreholes at Drigg, Cumbria, forming part of the British Geological Survey`s migration test borehole array. The cores correspond to the aquifer in which tests are undertaken. The study shows that several discrete units can be recognised within the aquifer but that these may vary laterally by a considerable amount over short distances. The sands and silts comprising the aquifer zone are generally finely laminated and show an upwards coarsening of grain size. They are interpreted as proximal glacial sediments, possibly having been deposited in a lake or ponded basin. Petrographic analysis shows that most of the porosity is lined by detrital ferruginous illitic clay which coats the sand grains. Some evidence of feldspar dissolution is identified. Pyrite is also present as an important detrital component. In the upper part of the aquifer the pyrite has been largely oxidised to form secondary ferric oxide compounds. However, pyrite increases in abundance with depth and its preservation may reflect a variation in redox across the aquifer. (author).}
place = {United Kingdom}
year = {1990}
month = {Nov}
}
title = {Petrographic and sedimentological characteristics of drift sediments from the radiotracer experiment array at Drigg, Cumbria}
author = {Milodowski, A E}
abstractNote = {A detailed petrographic, mineralogical and sedimentological study has been made of five drift sediment cores taken from shallow boreholes at Drigg, Cumbria, forming part of the British Geological Survey`s migration test borehole array. The cores correspond to the aquifer in which tests are undertaken. The study shows that several discrete units can be recognised within the aquifer but that these may vary laterally by a considerable amount over short distances. The sands and silts comprising the aquifer zone are generally finely laminated and show an upwards coarsening of grain size. They are interpreted as proximal glacial sediments, possibly having been deposited in a lake or ponded basin. Petrographic analysis shows that most of the porosity is lined by detrital ferruginous illitic clay which coats the sand grains. Some evidence of feldspar dissolution is identified. Pyrite is also present as an important detrital component. In the upper part of the aquifer the pyrite has been largely oxidised to form secondary ferric oxide compounds. However, pyrite increases in abundance with depth and its preservation may reflect a variation in redox across the aquifer. (author).}
place = {United Kingdom}
year = {1990}
month = {Nov}
}