Fracture induced emission of alkali atoms from feldspar |
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| Authors: | J. T. Dickinson L. C. Jensen S. C. Langford P. E. Rosenberg |
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| Affiliation: | 1. Physics Department, Washington State University, 99164-2814, Pullman, WA, USA
2. Geology Department, Washington State University, 99164-2812, Pullman, WA, USA
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| Abstract: | Emission of neutral atoms (K and Na) and molecules (H2O and KOH) observed during fracture of K-feldspar have been accounted for by two independent mechanisms. H2O and KOH emissions are attributed to the venting of fluid-filled inclusions, while emission of atomic K is due to surface effects accompanying cleavage of crystalline feldspar. The intensity of emitted potassium, at least 6 × 1014 atoms/cm2 of surface area, is sufficient to affect K activities in solution during microbrecciation in the presence of rock-dominated fluids. |
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