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The AAPG/Datapages Combined Publications Database
Journal of Petroleum Geology
Abstract
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Journal of Petroleum Geology, Vol.
IN FLUORITES FROM NORTHERN ENGLAND
* Imperial College, Prince Consort Road, London SW7 2BR
Abstract
Block
area of the Northern Pennine Orefield (NPO), is
reported. Reproducibility of the data is demonstrated by
comparing the analysis of samples collected on two separate
occasions. Although it has not proved possible to use the
technique to differentiate zones in individual crystals, it has
been shown that there is a good correlation between the amount of
gas and the nature of the mineral. Thus, massive fluorite
contains roughly twice the total amount of gas as single
crystals. The balance of saturated to unsaturated gases is shown
to be dependent on the temperature of emplacement of the mineral.
A comparison of this data with data obtained earlier from
minerals from the Askrigg
Block
and Derbyshire Dome has confirmed
these findings. The relationship between these saline fluid
inclusions, and those filled with oil from Derbyshire and
elsewhere, has led to speculation on the nature and timing of the
fluids responsible for mineralization.
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