Prosecutors have used the final day of a Goldfields pastor's firearms trial to suggest he overreacted when he fired a weapon during a confrontation at a mine site.

Pastor and activist Geoffrey Stokes discharged the firearm during a confrontation at the Lady Liddington mine, 700km north-east of Perth, in October 2014.

Stokes alleges he fired the gun to gain the attention of workers at the site, while prosecutors allege he did it to intimidate them.

Questioning Stokes on Friday morning, police prosecutor Thomas Banyard was quick to suggest the pastor had overreacted.

"Did you shoot first and ask questions later?" Senior Constable Banyard asked.

While Stokes conceded he had been angry, he rejected suggestions he was being violent or threatening.

"I never went down there to shoot anybody," he said.

Email suggests protest was planned

Key points: Pastor and activist Geoffrey Stokes is on trial after discharging a weapon at a mine 700km north-east of Perth

Pastor and activist Geoffrey Stokes is on trial after discharging a weapon at a mine 700km north-east of Perth Stokes says he was trying to stop work near a sacred site

Stokes says he was trying to stop work near a sacred site The prosecution today suggested Stokes had overreacted

Senior Constable Banyard also used his cross-examination to produce an email sent by Stokes's wife, paediatrician Christine Jeffries-Stokes.

Sent on the day of the confrontation, Dr Jeffries-Stokes's email labelled the mine a "desecration" and called for assistance.

"Geoffrey is there and going to protest to try and get the work to stop," Dr Jeffries-Stokes wrote.

Stokes confirmed he had called his wife before driving to the mine, and had wanted work to cease.

"I went down there to stop what was going on down there," Stokes said.

Pastor angered after being ignored

Asked why he chose to fire a gun rather than use a non-dangerous method of gaining the attention of workers, Stokes said he was tired of being ignored.

A verdict in Geoffrey Stokes's firearms trial is not expected for several months. ( ABC News )

"I was screaming and shouting and carrying on … and they ignored me," he said.

"I didn't beep the horn, because they weren't listening."

Stokes said he was angered by the presence of the workers, accusing Darlex, the company running the mine, of failing to respect local culture.

"I'm a Wati [lawman]. I should have been told in 2012 they were going to be mining there," Stokes said.

But he said he did not check the mine's legality with the Departments of Aboriginal Affairs and Mines and Petroleum, telling the court he regarded both departments as an enemy to Aboriginal people.

Senior elder testifies to site's significant status

Following Stokes's testimony, elder Glen Cook took the stand in his defence.

One of the region's most senior lawmen, Mr Cook said a key songline ran directly through the mine site.

"If the site is being cleared, it is doing damage to the site. It affects us very much," he said.

Mr Cook rejected any suggestion he could be mistaken about the location.

"Our people don't mistake like white people do," he said.

The trial concluded today, but the defence and prosecution are expected to make further written submissions.

Magistrate John O'Sullivan is expected to deliver his verdict on June 12.