Question: Which mine opened first Big Dan Mine or Negus Mine?

Context paragraphs:
Big Dan Mine: Big Dan Mine is an abandoned underground mine in Northeastern Ontario, Canada.  It is located about 1 km southwest of Net Lake and just west of the Ontario Northland Railway in east-central Strathy Township.  It is named after Dan O'Connor, who first claimed the site in the 1890s.

Cabin Branch Pyrite Mine Historic District: Cabin Branch Pyrite Mine Historic District is a national historic district located at Prince William Forest Park, Triangle, Prince William County, Virginia.  It encompasses 4 contributing sites and 42 contributing structures associated with the Cabin Branch pyrite mine.  The pyrite mine opened in 1889, and remained in operation until 1919 or 1920.  The property includes a number of capped mine shafts, and the remains of a commissary building and an old mill; and mine structures, including crusher house, mill, mechanical and support buildings, numerous rail lines.

State Mine railway station: State Mine was a railway yard and signal box on the Wonthaggi line along the Bass Coast, Victoria, Australia.  It was named for and served the adjacent State Coal Mine which provided black coal for the steam locomotives of the Victorian Railways.  The mine opened in 1909 with the branchline opened in 1910.  Production declined in the 1930s as larger seams were worked out but remained in operation until 1968 when regular steam operations were phased out.

Penhalonga: Penhalonga is mining village in the province of Manicaland, Zimbabwe located 18 km north of Mutare in a valley where the Sambi and Imbeza Rivers meet the Mutare River.  According to the 1982 Population Census, the village had a population of 4,477.  Ancient gold workings have been found in the area.  In 1895 the Penhalonga Mine opened and the village grew around the gold mine.  The name is derived from the Portuguese words "penha" meaning 'rocky mountain' and "longa" meaning "long".  While the old Penhalonga mine closed in 1943, a new mine, the Rezende Mine, opened in 1999.  Bauxite clay, which is also mined in the area, supplies most of Zimbabwe's pottery industry.  The village is the residential and commercial centre for the mine and the surrounding area of forestry, dairy and mixed farming.

Copperfields Mine: Copperfields Mine, originally known as Temagami Mine, is an abandoned copper and silver mine on Temagami Island in Lake Temagami, Ontario, Canada.  The mine opened in 1955 and comprises both underground and surface workings within a sulfide ore body.  Situated in Phyllis Township, the mine produced 34,000,000 dollars Canadian with 80 million pounds of copper, 230,028 ounces of silver and 13,271 ounces of gold.  It was considered to be the largest deposit of nearly pure chalcopyrite ever discovered in Canada.  A mill was not initially needed because the ore was 28% copper.  The mine closed in 1972 and is now flooded by water.  Ruins of the Copperfields mill are present as foundations.  It is possible to find mineral specimens in the spoil heaps of the old mine, such as chalcopyrite, pyrite, bornite, malachite, dolomite, hessite, merenskyite, millerite, palladium, quartz and others.  The Lake Temagami Access Road was created to ship ore from the mine site.

Thoresby Colliery: Thoresby Colliery was a coal mine in north Nottinghamshire.  The mine opened in 1925, and closed in 2015, then Nottinghamshire's last coal mine.

Negus Mine: Negus Mine was a gold producer at Yellowknife, Northwest Territories, Canada, from 1939 to 1952.  It produced 255,807 troy ounces (7956 kg) of gold from 490,808 tons of ore milled.  The underground workings were acquired by adjacent Con Mine in 1953 and were used for ventilation purposes until Con Mine closed in 2003.

Anina Mine: Anina Coal Mine is an underground mine that is now closed.  It was one of the largest mines in Romania.  It is located in South-Western Romania, in Anina, Caraş-Severin County in the historical Banat region.  The mine still has large reserves of anthracite, lignite, brown coal and oil shale amounting to over 1.3 billion tonnes.  It was owned by Miniera Banat a state owned company that specialised in the management of coal mines in the Banat region.  The mine opened in 1790 making it the longest running mine in Romania until its closure in 2006.  Its galleries are hundreds of kilometers in length and reach a depth of 1200 m making it the deepest mine in Romania and one of the deepest in Europe.  The mine supplied oil shale to the nearby Crivina Power Station, a 990 MW thermal power station, the first oil shale power station in Romania, that had to be supplied with around 4 million tonnes of oil shale per year.

Neves-Corvo mine: Neves-Corvo mine is a zinc-copper mine in Castro Verde Municipality, Portugal.  The deposit was discovered in 1977 and the mine opened in 1988.

Leckie Mine: Leckie Mine, also known as Penrose Mine and Little Dan Mine, is an abandoned gold producing underground mine in Northeastern Ontario, Canada, located on the eastern shore of Arsenic Lake 4 km north of the town of Temagami.  It is entirely owned by Temagami Gold Inc.  An estimated 483,500 tonnes of ore remain in the mine, which could contain 102,720 ounces of gold.

Supporting paragraphs: Negus Mine Big Dan Mine
Answer: Big Dan Mine