1998
DOI: 10.1144/pygs.52.2.215
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The petrology and paragenesis of fracture mineralization in the Sellafield area, west Cumbria

Abstract: SUMMARY The petrology and paragenesis of fracture mineralization hosted in the Ordovician, Dinantian (Carboniferous Limestone) and Permo-Triassic rocks of the Sellafield area were studied as part of the United Kingdom Nirex Limited programme of site investigations around Sellafield in west Cumbria for a deep repository for radioactive waste. This paper summarizes the petrological and mineralogical observations from 23 of the deep (up to 2 km) boreholes drilled by Nirex. A parag… Show more

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Cited by 54 publications
(33 citation statements)
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“…It must therefore be present in trace quantities, and so most likely has a relatively fast dissolution rate to produce the observed increase in sulphate. This is consistent with either anhydrite or pyrite dissolution, both of which have relatively fast dissolution kinetics and commonly occur as fracture-filling phases within the BVG in the Sellafield area and elsewhere in west Cumbria (Milodowski et al, 1998;.…”
Section: Reactions Of Young Cement Porewater (Ynfp) With Bvg Changes supporting
confidence: 76%
“…It must therefore be present in trace quantities, and so most likely has a relatively fast dissolution rate to produce the observed increase in sulphate. This is consistent with either anhydrite or pyrite dissolution, both of which have relatively fast dissolution kinetics and commonly occur as fracture-filling phases within the BVG in the Sellafield area and elsewhere in west Cumbria (Milodowski et al, 1998;.…”
Section: Reactions Of Young Cement Porewater (Ynfp) With Bvg Changes supporting
confidence: 76%
“…The age of the quarry is not known, but it seems likely that it was probably worked during the last 100-200 a to produce local stone for the construction of field boundary walls. However, the presence of euhedral secondary calcite crystals lining the surfaces of fractures within the carbonated larnite nodules might indicate that the calcite crystals grew within water-saturated pores (Milodowski et al, 1998) -i.e. when the rock was below the groundwater table.…”
Section: Low-temperature Alterationmentioning
confidence: 99%
“…24,25 The volcanic rock was the mineralogically most complex of the geomaterials. 26 It consisted of approximately 50 wt% quartz, with chlorite, mica (probably muscovite; Fig. 1C), plagioclase, and calcite (apparently with some Mg content because the main peak is displaced from 3.03 to 3.024Å; Fig.…”
Section: Characterisation Of Geomaterialsmentioning
confidence: 99%