We have an example from the Main Central Thrust zone of central Himalaya (Nyalam transect, south Tibet - central Nepal) that may be interesting to you. In one sample, staurolite and kyanite coexist with identical ilmenite and graphite inclusions (Fig. 3c); in another sample, kyanite is perhaps relatively late that it cut the inclusion trails within the staurolite (Appendix Fig. A.1c).

Related reference: Wang J.M., Zhang J.J., Wei C.J., Rai S.M., Wang M., Qian J.H., 2015. Characterising the metamorphic discontinuity across the Main Central Thrust Zone of eastern-central Nepal. Journal of Asian Earth Sciences, 101, 83–100.

Jiamin Wang
Email: [log in to unmask]; [log in to unmask]
Institute of Geology and Geophysics, Chinese Academy of Sciences
Beijing, China, 100029

From: Dave Pattison

Date: 2016-06-23 02:19

To: GEO-METAMORPHISM

Subject: staurolite-kyanite relations

Hi all. Do any of you know of samples/photomicrographs showing textural evidence of of staurolite breaking down to form kyanite in metapelites? I have examples of staurolite being replaced or pseudomorphed by andalusite, and by sillimanite (the latter commonly in association with muscovite pseudomorphs after staurolite, as Tom Foster has documented), but not by kyanite. In the St-Ky samples I have observed, staurolite and kyanite appear to coexist with no apparent reaction relationship, or they may be intergrown. But, my sample size is not that great, hence my request. Regards to all, Dave

David R.M. Pattison

Department of Geoscience

University of Calgary

ES 154 | 2500 University Drive NW, Calgary, Alberta, CANADA T2N 1N4

T: 403.220.3263 | [log in to unmask] | www.ucalgary.ca/pattison