Hello Janos,

I realize this is outside of conventional tectonics, but we did a study
on impact cratering experiments in marble and quartzite comparing
inter- and intragranular fractures:

https://onlinelibrary.wiley.com/doi/abs/10.1111/maps.13080

Cheers,

Michael



On Thu, 26 Mar 2020 11:23:44 +0100
 Janos Urai RWTH <[log in to unmask]> wrote:
>Dear colleagues,
>
>we are studying Mode I fractures in limestone using BIB-SEM and see
>that the fracture is partly intracrystalline (nice flat and stepped
>calcite cleavage) and partly intercrystalline (broken grain boundaries
>and pores).
>
>I tried to find papers about intragranular versus intergranular
>fracture surfaces and the ratio between intra- and intercrystalline
>microcracking in different rocks but was not very successful - may I
>ask your help in finding the relevant literature?
>
>Thanks in advance
>
>kind regards, Janos
>
>Prof. Dr. Janos L. Urai
>RWTH Aachen University
>e-mail: [log in to unmask]
>
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