The paper of Kisch and van den Kerkhof (1991) gave rise to a discussion by Pasteris et al. (1993) about the accuracy of quantitative gas analysis by Raman micro-spectrometry. We feel that this discussion concerns not only our data, but many other Raman data published so far. The Raman data published in Kisch and van den Kerkhof (1991) have some shortcomings, as seen from the present state of knowledge. In this paper, we report some corrections of our earlier published Raman results, and we briefly discuss the possibilities of Raman analyses for geological applications. The recalculated gas compositions show only small deviations compared with the earlier values, and they do not change the interpretation of geological trapping conditions in Kisch and van den Kerkhof (1991).

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First page of CH<sub>4</sub>-rich inclusions from quartz veins in the Valley-and-Ridge province and the anthracite fields of the Pennsylvania Appalachians—Reply
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