Thanks to Rob for providing this reference. Haven't been able to look at it myself, and I don't know if it is online -- any info gratefully received!
J.W Janusek, P.R.Williams,M.Golitko and C.L.Aguirre 2013. Building Taypikala: Telluric transformations in the lithic production of Tiwanaku. In Mining and Quarrying in the Ancient Andes, N. Tripcevich and K.J.Vaughn (Eds), 65-98 Springer.