PDFs are exclusive to impact events. However, lightning strikes might reach the PT values needed for their creations. Are there any recent studies or papers discussing the matter?
yeah of course. This is actually a major topic for my master thesis with Prof. Kenkmann. I am just inquiring if there is some literature on the matter.
M. A. Pasek1, G. S. Collins2, E. A. Carter3, H. J. Melosh4 and Z. Atlas1.SHOCKED QUARTZ IN A FULGURITE. Abstract of the 73rd Annual Meteoritical Society Meeting (2010).
the authors reported on shocked quartz in a Fulgurite showing planar fractures and toasted quartz. The shocked quartz, however, lacks planar deformation features (PDFs) and shows no high pressure SiO2 polymorphs like coesite or stishovite.
In an earlier study, a Brasilien author reported on PDFs and high pressure SiO2 polymorphs in "lightning quartz", but I do not remember the title of the study and the results were never confirmed.
there is another paper on possible shocked quartz grains produced by lightning recently published (Gieré et al. 2015. Lightning-induced shock lamellae in quartz). I feel that the results are not completely convincing (in particular the TEM analyses), but get your own idea. However, the reference list provides the most recent literature in this case. I attached the paper for your convenience (-:
I think Elmar's answer was quite comprehensive—the Gieré et al. (2015) paper should cover the most recent reference list. However, I recently stumbled over an abstract
by Martin Ende dealing with that topic, which later led to the Ende et al., 2012, European Journal of Mineralogy 24, pp. 499–507 paper also cited by Gieré et al. Maybe this is also of help to you.
Greetings from Berlin!
Chris
Conference Paper Shocked quartz in Sahara fulgurite