"I prefer to preserve the evidence in place," she said.
But she has issued summonses to the naval officers who were aboard the Seabed Constructor when it found the submarine on Friday, a year and a day after it vanished in the South Atlantic with all aboard.
Crushed from an implosion, the submarine was located at a depth of more than 900 metres (3,000 feet) in a desolate area of undersea craters and canyons 400 kilometres (250 miles) off the coast.
"I don't have words to describe it, I feel profound pain and anguish," he said in a brief video carried by local media. "But at the same time we know where they are and it is the first step to learn the truth of what happened."
"It's a very hard day, an inconceivable, unreal day. But it is also the first step, which has taken a year, to reach the truth. We are not going to rest until we know what happened."
Defence Minister Oscar Aguad met Saturday with the families of the victims and showed them photographs of the wreckage, including images of a propeller, the sub's torpedo-launching tubes and an upper section of the vessel lying on the ocean floor. (To see these images, see out story from yesterday.)
"We are all destroyed here," said Yolanda Mendiola, the mother of crewman Leandro Cisneros, 28.
"I still had hopes that they could be alive," Luis Niz, the father of a missing sailor, told reporters, even though President Mauricio Macri's government had declared two weeks after the sub's disappearance that there could be no survivors.
Although an official investigation was opened a year ago, investigators have had little to go on until now.
Nonetheless, Navy chief Marcel Srur was removed from his post in December.
Seabed Constructor, a jewel in the fleet of US-based exploration company Ocean Infinity, was headed Sunday for Capetown, South Africa for maintenance, the Navy said. It currently has onboard four relatives of missing crew-members, who were observing the search from the ship.
According to preliminary information released by the Navy, the San Juan imploded two hours after its last communication with the Mar del Plata naval base, its home port, on November 15, 2017. The sound of the explosion was recorded and traced to the general area where the submarine was found.
In a message broadcast, Macri promised to get to "the truth needed to honour and respect our heroes and their families."
"A serious phase of investigation is underway to know the whole truth, a truth to which we've all been committed from day one," he said, announcing three days of national mourning.