This side-mission can be found by entering the Normandy’s galaxy map and having the ship travel to the following location:
Crescent Nebula > Lusarn > Tarith.
Scan the planet and locate the anomoly to begin the mission.
Follow the path away from the landing site until you reach an abandoned camp. Check out the crates for a datapad , and activate the beacon on the left side. Continue down the path and hit the next beacon terminal you see on the left. As you approach the third beacon , you will be attacked by a Klixen so just keep your distance and pop it before activating the terminal.
Look to the left to find a raw material deposit containing Palladium , then follow the beacon into the mist. Eliminate another few Klixen then head to the very left portion of this area for another raw mineral deposit . Find your way up the hill, using the blue stream of energy as a guide. At the top of the path you will enter another derelict camp. Here you will find another datapad . Activate the beacon terminal here.
Follow the path down the hill into the mist. At the fork, check the left area first for another raw material node before cruising down the path to the right towards the next beacon. As you approach, a group of three Klixen will approach through the mist to the left. So destroy them before picking up the PDA nearby and activating the beacon . Continue onwards to the left. In the next area, check out the right side for a raw material node , then return to the right and climb the hill. Hit the next beacon at the top before continuing down the path towards the next beacon. Kill the two Klixen that attack you, and then hit the beacon .
Climb the hill nearby and kill the pair of Blood Pack Vorcha defending the top. Look behind them for a canister of Refined Platinum . Return down the hill and follow the blue energy to the final beacon . After hitting this switch, make your way up to the relay at the top of the mountain.
When you arrive you will be attacked by a named Krogan - Salumal - who has a barrier and a shield and likes to charge at you along with his contingent of 3-4 Vorcha Troopers. When they are dead, bypass the communications terminal nearby to complete the mission.