Question: What natural resource was found in both Murray Brook Mine and Beaulieu Mine?

Context articles: Faro, Yukon
List of colleges of natural resources
Natural resource economics
Ray Hilborn
Waykira
Beaulieu Mine
Scott Barrett (political scientist)
Environmental mitigation
National Ocean Service
Murray Brook Mine

Faro is a town in the central Yukon, Canada, formerly the home of the Faro Mine, the largest open pit lead–zinc mine in the world as well as a significant producer of silver and other natural resource ventures.
 The mine was built by the Ralph M. Parsons Construction Company of the USA with General Enterprises Ltd. of Whitehorse being the main subcontractor.
 As of 2011, the population is 344, considerably lower than its peak of over 2,100 in February 1982.
 Faro was named after the card game.
This is a list of colleges of natural resources around the world, offering bachelor's, master's or doctoral degrees in natural resource science, natural resource management, or related fields.
Natural resource economics deals with the supply, demand, and allocation of the Earth's natural resources.
 One main objective of natural resource economics is to better understand the role of natural resources in the economy in order to develop more sustainable methods of managing those resources to ensure their availability to future generations.
 Resource economists study interactions between economic and natural systems, with the goal of developing a sustainable and efficient economy.
Ray Hilborn (born 1947) is a marine biologist and fisheries scientist, known for his work on conservation and natural resource management in the context of fisheries.
 He is currently professor of aquatic and fishery science at the University of Washington.
 He focuses on conservation, natural resource management, fisheries stock assessment and risk analysis, and advises several international fisheries commissions and agencies.
Waykira (Aymara "wayku" gorge; mountain brook, "ira" mine, "gorge mine" or "mountain brook mine", also spelled "Huayquera") is a mountain in the Andes of Peru, about 5200 m high.
 It is located in the Puno Region, Lampa Province, on the border of the districts Palca and Paratía.
 Waykira lies southeast of the mountain Qillqa and south of Hatun Pastu.
The Beaulieu Mine was a post-World War II gold mining operation near Yellowknife, Northwest Territories.
 It entered production in October 1947, but by the end of November only 7 troy ounces (220 g) of rough gold were recovered.
 Additional gold was recovered during 1948, but altogether the mine recovered only 30 troy ounces (930 g) of fine gold.
 The operation folded in chaos and bankruptcy.
Scott Barrett is a professor of natural resource economics at Columbia University.
 There, he holds the title of Lenfest Professor of Natural Resource Economics at the School of International and Public Affairs and The Earth Institute.
Environmental mitigation, compensatory mitigation, or mitigation banking, are terms used primarily by the United States government and the related environmental industry to describe projects or programs intended to offset known impacts to an existing historic or natural resource such as a stream, wetland, endangered species, archeological site or historic structure.
 To "mitigate" means to make less harsh or hostile.
 Environmental mitigation is typically a part of an environmental crediting system established by governing bodies which involves allocating debits and credits.
 Debits occur in situations where a natural resource has been destroyed or severely impaired and credits are given in situations where a natural resource has been deemed to be improved or preserved.
 Therefore, when an entity such as a business or individual has a "debit" they are required to purchase a "credit".
 In some cases credits are bought from "mitigation banks" which are large mitigation projects established to provide credit to multiple parties in advance of development when such compensation cannot be achieved at the development site or is not seen as beneficial to the environment.
 Crediting systems can allow credit to be generated in different ways.
 For example, in the United States, projects are valued based on what the intentions of the project are which may be to preserve, enhance, restore or create (PERC) a natural resource.
The National Ocean Service (NOS), an office within the U.S. Department of Commerce National Oceanic and Atmospheric Administration (NOAA), is responsible for preserving and enhancing the nation’s coastal resources and ecosystems along 95000 mi of shoreline bordering 3500000 sqmi of coastal, Great Lakes, and ocean waters.
 Its mission is to "provide science-based solutions through collaborative partnerships to address evolving economic, environmental, and social pressures on our oceans and coasts."
 NOS works closely with many partner agencies to ensure that ocean and coastal areas are safe, healthy, and productive.
 National Ocean Service scientists, natural resource managers, and specialists ensure safe and efficient marine transportation, promote innovative solutions to protect coastal communities, and conserve marine and coastal places.
 NOS is a scientific and technical organization of 1,700 scientists, natural resource managers, and specialists in many different fields.
 NOS delivers a dynamic range of nationwide coastal and Great Lakes scientific, technical, and resource management services in support of safe, healthy, and productive oceans and coasts.
 NOS develops partnerships to integrate expertise and efforts across all levels of government and with other interests to protect, maintain, and sustain the viability of coastal communities, economies and ecosystems.
The Murray Brook Mine is a VMS deposit in the Bathurst Mining Camp (BMC) of northern New Brunswick, Canada owned by NovaGold Resources.
 The deposit was discovered in 1955 and contains the largest gossan zone in the BMC.
 From 1989 to 1992 the gossan zone was processed for gold and silver.
 In 1992 copper rich ore was crushed and tested for heap leaching.