From the source:
The only reliable information provided by the scientists was that they were planning an expedition to the pyramids to research them more thoroughly and determine for sure whether the structures were artificial or natural.
However, I am even doubtful that there is such a group of scientists or a planned expedition. No names are given. They don't mention a team, university, or research group affiliation.
This is an old claim, with a YouTube video to go along with it. It provides three photos, two of which are of the same feature.
Another Youtube video includes a 4th photo that other sites use (ref, ref). However, that photo is by Al Powers during his 2008 Antarctica trip. He says: "it is just an ice and snow covered hill".
The photo in the question and most of the stories is a known glacial horn (also known as a "pyramidal peak").
It's actually just the east end of Schatz Ridge. Here's a Google map view of it. Here are some other photos of this peak from a slightly different viewpoint pic 1, pic 2, pic 3.
Coincidentally, there is also a specific peak named "Pyramid Peak"
Here's a top down view of Pyramid Peak in Google maps. It was named in 1963.
An ice and snow covered hill, from 2008
The third, credited to Etienne Classen
A peak actually named "Pyramid Peak", that the stories don't even mention, demonstrating that these formations are not that hard to find