B. J. Skinner
E. Roedder
1968
<p><span>The possibility of leakage of fluids into or out of </span>fluid<span> </span>inclusions<span> subjected to large pressure gradients has always been considered a serious problem in the interpretation of </span>inclusion<span> data. As previous </span>experimental<span> </span>evidence<span> on leakage was contradictory, new experiments were performed. </span>Inclusion<span> vapor bubble diameters in twelve quartz crystals (≤ 3 mm; 8 localities), </span>not<span> sawn, ground or polished, were measured. The samples were run at Pa-.o,-4,000 bars, at T u 100°-410° C, for ≤ 17 days total, and remeasured after each run. Similar experiments at ≤ 155° C were made on sphalerite and calcite. Most </span>inclusions<span> in most samples (even those only 5am under the surface in quartz) showed no change in bubble diameter, hence no leakage. A few exceptions, mainly among </span>inclusions<span> homogenizing at T « Tru, had P </span><sub>internal</sub><span> » P </span><sub>internal</sub><span>, hence they ruptured and lost liquid during the 410° C run. From this work and a review of the literature, we conclude that most </span>inclusions<span> have </span>not<span> suffered major leakage. Some previous experiments indicating leakage may be explained by microfractures introduced during sample preparation. The present work does </span>not<span>, however, preclude the possibility of diffusion of small but chemically significant amounts of substances such as hydrogen in or out of </span>inclusions<span>.</span></p>
application/pdf
10.2113/gsecongeo.63.7.715
en
Society of Economic Geologists
Experimental evidence that fluid inclusions do not leak
article