Seems I found a source:
In her memoir, Ravished Armenia, Aurora Mardiganian described being raped and thrown into a harem. From a wealthy banking family, she was just one of thousands of Armenian girls to suffer a similar fate. Many were eventually killed and discarded.
In the city of Malatia, she saw 16 girls crucified, vultures eating their corpses. “Each girl had been nailed alive upon her cross, spikes through her feet and hands,” Mardiganian wrote. “Only their hair blown by the wind covered their bodies.”
Wow, I had heard of the Armenian genocide but never really looked into it. What a horror. After reading your source I no longer doubt the image.