Yes, you will have to treat telemetry encounters as recapture/resighting events. That way the data will be amenable for analysis using SECR models. You could also seek some help on SECR/DENSITY forums. I am not sure if anyone has done it exactly the way you have proposed, but a few studies using a similar approach are as follows.  

Miller, S. D., White, G. C., Sellers, R. A., Reynolds, H. V, Schoen, J. W., Titus, K., … Schwartz, C. C. (1997). Brown and black bear density estimation in Alaska using radiotelemetry and replicated mark-resight techniques. Wildlife Monographs, 133, 5–55.

Powell, L. A., Conroy, M. J., Hines, J. E., Nichols, J. D., & Krementz, D. G. (2000). Simultaneous Use of Mark-Recapture and Radiotelemetry to Estimate Survival, Movement, and Capture Rates. The Journal of Wildlife Management, 64, 302–313. doi:10.2307/3803003

I also had done something similar, but not with radio-telemetry data

Sharma, R. K., & Jhala, Y. V. (2010). Monitoring tiger populations using intensive search in a capture–recapture framework. Population Ecology, 53(2), 373–381. doi:10.1007/s10144-010-0230-9

I don't think you can do it, unless you know what is the proportion of animals you have telemetry data on. Otherwise, there is no information on resights of a sample of tagged animals on the proportion of untagged animals, and hence you can't get density/abundance. At best, if you have a large and representative sample of animals for which you have telemetry, you can construct a RELATIVE density surface, which essentially would represent habitat use (assuming you get locations  independently of habitat, which might or not be true!). But you have no information on the telemetry data alone to inform about the height of said function. I believe the references provided by @Rishi Kumar Sharma are only useful if you have BOTH telemetry data and additional information (e.g. captures and recaptures of both telemetry and non telemetry animals), which is clear form the wording in the title ("....radiotelemetry and replicated mark-resight techniques..." and "....radiotelemetry and replicated mark-resight techniques...") 

Rishi and Tiago,

Thanks for your thoughts.  Tiago's summary is what I suspected that you need to have some complimentary information (e.g. camera trapping or live trapping etc...) beyond telemetry data but I was not certain. I will look at the papers that Rishi suggested.

Thanks again for your thoughts!

PAZ

I agree with Tiago. You need more information. Maybe you could read the attached paper:

I don't have a clue apart of what Tiago already mentioned, but I suggest that you should contact Dan Linden. I am pretty sure he have deal in a way with this kind of problem and certainly is someone to ask about if you are thinking on spatial capture-recapture using telemetry.

Cheers

Fer

I agree with Tiago. You can get survival estimates with Mark from radiotagging data, but I don't think you will be able to get abundance or density estimates. The issue is that, as far as I know, all methods rely on a fundamental assumption: that all animals have the same capture probability, regardless of being marked or not. The assumption is essential to use the information from your sample for estimates of the population. This assumption can be relaxed by allowing p c, but you still need information to estimate those independently. In your case, p for unmarked animals will always be 0 (and probably p for marked animals 1). I cannot imagine a way to get population estimates from there...but of course, I am far from am expert...and some cool methoud could exist.

Good luck with those data!!

 Asier