Thanks for the radiocarbon link.
I went through that thesis. I'm not sure that its contents are precise enough to definitively date Puma Punku. Excerpts include :
"Because of the changing amount of 14C isotope in the atmosphere, results obtained in laboratories should be converted from radiocarbon years into calendar ages. This transformation called calibration is unfortunately not a one-to-one transformation.
This collection consists of more than 130 dates.
More than one in every five dates gathered here, however, do not mention when they were produced. It was assumed, that the six `not-fully-described' dates from Chile were probably produced in 1960s or 1970s (according to date of publication by Berenguer 1978).
The set of Tiwanaku radiocarbon dates gathered here is certainly not complete nor is it statistically very large, therefore it is difficult to treat the results presented here as precise answers to above mentioned aims.
98 dates form the set from the Titicaca lake basin. Cultural/stylistic contexts of samples were determined from original publications as Tiwanaku I, II, III, IV, V, Early, Classic, Late Formative 1 or 2, or the dates were related to construction phases of supposed state / ritual architecture. There are 62 dates from samples collected from the Tiwanaku site: 14 from Kalasasaya, 13 from Akapana, 5 from the area "between Akapana and Putuni", 4 from Kantatayita (Ziólkowski et al. 1994), 12 from Akapana East sector, 7 from Putuni, 1 from Kheri Kala, and 1 from Puma Punku (A.Vranich, 1999).
Although newer dates produced in the 1980s and 1990s (mainly from the Wila Jawira Project) represent almost half of collection, they come only from sites in the Moquegua valley and Titicaca basin. The cultural context of all gathered dates is often not described according to Tiwanaku I-V phases. Furthermore, in most cases, sample materials were charcoal, but often references lack any information about sample material."
With only one sample being from Puma Punku and stone being undatable, do you have any more reliable data to accurately date the site of Puma Punku?