Here's something more recent than Shchukin or Veselovskyi:
http://kronk.narod.ru/library/guschina-zasetskaya-1994.htm
Judging by the contents account (and that's all we have here) the burials were of the "catacomb" type. That settles it: this was the primary Alanic custom. So these are Alanic graves. Not "barbarized Romans" (Veselovskyi) nor "Romanized barbarians" of uncertain Sarmatian ethnicity (Shchukin). Yatsenko peripherally speaks of the "kurgans" and gakks of this cemetery (in your "tamga feast" posting). The Roman influence is probably explainable by the political contacts of the Bosporan kingdom. Which was actively "sarmatized" from the 1rst c. CE. These Sarmats were Alans (this we know from many sources).