Company Background


Griffin Mining Limited (‘Griffin’ or ‘the Company’) is a mining and investment company, incorporated in Bermuda, whose shares are quoted on the Alternative Investment Market of the London Stock Exchange (“AIM”).

The major asset of the Company is an 88.8% interest in Hebei Hua Ao Mining Industry Company Limited (‘Hebei Hua Ao’), the holder of 8.1 square kilometres of mining and exploration licences and the mine and processing facilities at Caijiaying in the People’s Republic of China (the “Caijiaying Mine”).

The Company also holds 90% of Hebei Sino Anglo Mining Industry Company Limited (“Hebei Anglo”), which controls 15.7 square kilometres of exploration licences immediately surrounding the Caijiaying Mine.

The Caijiaying Mine is an operating zinc, gold, silver and lead mine, together with processing plant, camp and supporting facilities, located approximately 250 kilometres by road, north-west of Beijing in Hebei Province in the People’s Republic of China (“the PRC”). The Caijiaying Mine is easily accessible by two freeways from Beijing. The site has significant water supplies, two 35 thousand volt “kv” power lines connected to the electricity grid, full connectivity to fixed and mobile tele-communications systems and  broadband access for the internet services. It is 63 kilometres from Chongli, the host city of the 2022 Winter Olympic Games, to which a high speed train link from Beijing is currently being constructed. Climatic conditions are not severe with warm summers and cold, dry winters, enabling the Caijiaying Mine to operate for 365 days a year.

The Company continues to aggressively explore, expand and develop the Caijiaying mine, whilst also investigating further potential acquisitions of mining projects that are capable of being brought into production and to meet historically preset, economic returns to shareholders.


Griffin Mining Limited was formed in May 1988 in Bermuda as a mining finance company. In June 1997, the Company’s shares were admitted to trading on the Alternative Investment Market (“AIM”) of the London Stock Exchange.

In October 1997, the Company changed its principal activities to mining and its name to Griffin Mining Limited. In November 1997 Griffin acquired a 50% equity interest in China Zinc Pty Ltd which held a 60% interest in the Hebei Hua Ao Mining Industry Company Limited (“Hebei Hua Ao”) a Chinese joint venture company, which holds the mineral rights at Caijiaying in the Hebei Province in Northern China. In March 1998, Griffin acquired the remaining 50% equity stake in China Zinc Pty Ltd, giving Griffin a controlling 60% interest in Hebei Hua Ao. In June 2012, Griffin acquired a further 28.8% interest in Hebei Hua Ao taking its interest to 88.8% and at the same time negotiated an extension of the term of the Hebei Hua Ao Joint Venture for a further 25 years to October 2037.

Griffin through Hebei Hua Ao holds exploration licence tenements over 6.0 sq km at Caijiaying with a mining licence over some 1.5 sq km. Within these licence areas are eight zones of mineralisation, one of which, Zone III, is currently being mined. Development work is has been undertaken to access the Zone II area to the south in anticipation of a further mining licence over that area and the area between Zones II and III. Griffin holds an exploration licence over a further 15.7 sq km through a second Chinese joint venture company, Hebei Anglo, with further zones of mineralisation.

The Caijiaying Mine was commissioned on time and budget in 2005 with an initial design production throughput rate of 200,000 tonnes of ore per annum. Numerous upgrades to the Caijiaying Mine and processing facilities have taken place since commissioning leading to the latest upgrade which has taken the name plate mill throughput capacity to 1.5 million tonnes of ore per annum.

Underground development continues with the expansion of the existing mining operations at Zone III down to the 1,000 RL. Access to the Zone II area to the south of Zone III has been constructed allowing for underground drilling and exploration at Zone II. The mining and development of Zone II is subject to the successful granting of a new mining licence over that area.

Griffin has been the leader in foreign investment in mining in China having been engaged in developing the Caijiaying zinc gold project since 1997.

Hebei Hua Ao, was the first foreign controlled entity to receive an exploration licence in the Peoples Republic of China and the first to be awarded a new mining licence over a metal deposit in China, as well as being the first to construct a new mine. Griffin has been a responsible investor in China taking care of the environment and the local community. In November 2010 Hebei Hua Ao received the environmental award at the 2010 China Mining conference and in November 2011 the Mine Development Outstanding Achievements award at that years China Mining conference.

Caijiaying Mine Winter 2013

The Caijiaying Project Background

Drilling at Caijiaying 1998

Mineralisation was first identified at Caijiaying by the Chinese in the 1960’s. In 1994, following the introduction of legislation in China allowing the formation of joint venture entities with foreign parties, Hua-Ao was formed and in 1996/97 Griffin acquired its interest in Hua-Ao.

Partnership with the Chinese

Griffin’s Chinese partner in Hua-Ao is the Zhangjiakou Guoxin Enterprise Management and Service Centre (formerly the Zhangjiakou Caijiaying Lead Zinc Mining Company), a partnership comprising of the Zhangjiakou City Government, and the Third Geological Brigade, of the Hebei Province. Griffin maintains good relations with the Chinese authorities at township, county, provincial, and state levels, which has perhaps enabled Griffin to advance its Caijiaying project further than any other foreign controlled mining project in China.

Signing ceremony for the purchase of additional interest in Hebei Hua Ao

Caijiaying Development and Investment

Since the acquisition of its interest in Hebei Hua Ao, Griffin has undertaken extensive exploration, resource delineation drilling and other work, leading to a scoping study, feasibility study, financing and construction of the Caijiaying mine and processing facilities. In 2005 Griffin successfully commissioned the Caijiaying Mine on time and within budget, meeting its initial design throughput rate of 200,000 tonnes of ore per annum. Production rates have been steadily increased since commissioning to just under one million tonnes of ore per annum.
In December 2007, production of a separate precious metals concentrate containing gold, silver and lead commenced from an integrated circuit forming part of the main processing facilities at the Caijiaying Mine. This allowed the full economic benefit of these metals to be obtained by the Group. Previously gold, silver and lead were “lost” and unaccounted for in the zinc concentrate by the Chinese smelters.

Mill opening June 2005

To date Griffin has invested some $280m on acquiring its interest in Caijiaying and in the development and construction of the mine and processing facilities.

Exploration and resource definition work is ongoing at Caijiaying. There are eight known areas (zones) of mineralisation within Hebei Hua Ao’s tenement area with Zone III currently being mined and development work commenced at Zone II and in the area between Zones II and III. The latest JORC reported Mineral Resource Estimate for Caijiaying Zones II & III amended for mining depletion totals 68.4 million tonnes, representing a 70 plus year mine life at current extraction and throughput rates and over 45 years at planned expansion rates.

Further information on Caijiaying may be found in the section on Caijiaying.

Community Investment & Partnership


The Company, through Hebei Hua Ao, continues to maintain and further implement best practices regarding the protection of the environment. The Company believes this to be a moral, humane, community and planetary obligation. This includes:

  • Controls to prevent the discharge of waste into the environment;
  • Sewage treatment plants at the mine and camp sites to deal with all effluent produced;
  • All water from the Caijiaying Mine and accommodation site being recycled;
  • Boiler flue gases being treated by a dust and sulphur extraction system to prevent the emission of pollutants into the atmosphere;
  • Waste rock and mill tailings being used for backfilling underground stope voids. This minimises the mine
  • footprint by reducing the need for larger tailings and waste storages;
  • Noise and dust from operations being strictly controlled;
  • Commencement of rehabilitation work on Tailings Dams 1 & 2. This work has included battering the waste dump slope and sheeting with soil ready for vegetation;
  • Funding the state endorsed China “greening” project including the planting of trees by local villagers in the Caijiaying area;
  • Approval from the relevant authorities to increase the capacity of the dry tailings storage facility without an increase in the footprint of the facility via modern design practices;
  • Maximum recycling of dry tailings by transportation to a local brickworks for use as base material in brick manufacturing; and
  • A dedicated waste collection building to accumulate Caijiaying Mine waste prior to sorting, collection and recycling where possible.

These environmental best practices have been recognized in the past by the Chinese Government with Hebei Hua Ao being presented with the Environmental Award and the Mine Development Outstanding Achievement Award at successive China Mining Conferences.

These practices were further augmented in 2018 with:

1,507 Poplar and 170 Pine trees planted around the Caijiaying Mine;

3 Total Suspended Particles (“TSP”) online monitoring systems being installed and continually monitored by the Municipal Environmental Protection Authority Information Centre;

The Heavy Metal on-line monitoring equipment being replaced by more modern systems and monitored on-line by the Municipal Environmental Protection Authority Information Centre;

The implementation of stage 1 of the ROM pad dust suppression project with dust suppression meshes and water spray system installed effectively controlling dust on the ROM pad;

An upgrade of the dust collection system in the screening house with new dust collectors effectively reducing fine ore loss and dust discharge;

The completion and acceptance of the 2018 clean production targets with the targeted reduction in heavy metal confirmed;

The purchase of mist cannon and vacuum trucks for dust suppression leading to a substantial improvement in dust control at the Caijiaying Mine;

The blending of semi-coke coal with common coal for use in boilers to reduce the discharge of smoke, sulphur dioxide and nitric oxide. The site boiler chimney was also waterproofed to ensure no irregular discharge and safety of operation;

The planting of 570 Spruce trees around the new carpark at the entrance to the Caijiaying Mine gate;

The accommodation camp courtyard has been expanded and the hardened area enlarged with further greening continuing including substantial vegetable gardens and flower beds; and Tailings recycling being further enhanced with 73,672.82 cubic metres of tailings shipped to a local brickworks which reduced the pressure of tailings storage and environmental encroachment.

Receiving Environmental Award at the 2010 China Mining Conference
Teaching English at School of Hope in Sanhao


The Company, through Hebei Hua Ao, has invested heavily in the local community with Hebei Hua Ao providing:

  • The drilling, construction and operation of a new water bore at Caijiaying village providing abundant and excellent quality water whilst maintaining the original water bore as a standby water supply;
  • Construction and maintenance of sealed and reinforced roads in the greater Caijiaying area;
  • Construction of a pedestrian and traffic bridge into the west side of Caijiaying Village;
  • Finance for the construction of a local Kindergarten and Primary school, an Old Age Care Home and other infrastructure projects in the Caijiaying greater area;
  • Winter coal supplies to the local primary and secondary schools;
  • Establishment of “Project Hope” to provide scholarships to local students for ongoing study at primary, secondary and tertiary levels, including scholarships to overseas tertiary institutions;
  • Donating the time of expatriate workers from the Caijiaying Mine every week to teach English at the local township school;
  • Supplementary pension payments to the elderly in the Caijiaying area;
  • Financial hardship alleviation support to local village residents;
  • Entertainment allowances for local cultural events;
  • Traditional local specialties for annual cultural events such as the Chinese Lunar New Year, Dragon Boat
  • Festival and the mid-Autumn Festival; and
  • 500 head of cattle to Caijiaying village to successfully create a dairy and cattle farm to ensure a more
  • sustainable annual income less reliant on the seasonality of crops grown in the short summer months.

It is estimated that the Caijiaying Mine currently provides direct and indirect employment to over 1,000 Chinese nationals.

During 2018, Hebei Hua Ao paid RMB234m ($34.8m) (2017: RMB191 million ($28.4 million)) in taxes, royalties, social security fees and other duties to Chinese Governmental authorities and agencies. It is recognised as the largest tax payer in the local Zhangbei County and one of the largest in Zhangjiakou City prefecture.

Cows provided by Hebei Hua Ao to the local community


In view of the significant potential of the Caijiaying Mine and surrounding areas and given the Company’s knowledge and expertise in China, the directors and management have focused on the further development of Caijiaying, investigation of prospective areas near to Caijiaying and other potential projects in China.

Nevertheless, significant time continues to be spent on the evaluation of mining companies and projects worldwide to ascertain whether any successful acquisition can be made which has the possibility of matching the extraordinary returns provided by the Caijiaying Mine.



Caijiaying’s short and long term metal production capability has been augmented with the expansion of the grinding and flotation circuits, ongoing underground infrastructure development and exploration work. Exploration has been focused on identifying geological targets and evaluating the potential for significant additional resources. Whilst the existing Mineral Resource Estimate confirms the availability of extensive resources at the Caijiaying Mine for increased production, further resource additions will also provide an opportunity to further increase production at the Caijiaying Mine. This will require further licences and permits from various Chinese authorities, an increasingly time-consuming process.

Currently with the 1.5 million tonne processing plant upgrade completed, every effort is being made to obtain permits to enhance production and obtain a new mining licence at Zone II. This will allow all the known resources in Zones II and III to be extracted at a higher and more economic rate. Development work underground from the main Zone III area towards Zone II has enabled further resource definition underground drilling to be undertaken.

A new haulage drive was completed during 2016 with the dual purpose of improving ventilation and removing previous bottlenecks caused by having only a single haulage decline to surface. Development work at Zone II is planned to begin as soon as the new mining licence is received. It is expected that this work will be completed in 2020 and that this will enable significant production increases from 2021 onwards.

The two declines accessing the lower sections of Zone III are being extended to the 1000 metre level in order to access the Mineral Resource between the 1175 metres and 1000 metre horizons to provide long term mill feed.

Both declines have been advanced to the 1060 metre level with an interlink drive connecting the declines at the 1100 metre level. Work is being underetaken on the establishment of a new 5 metre diameter, 300 metre deep, main exhaust shaft and a 5 metre diameter, 180 metre deep, fresh air intake shaft. A second portal was successfully completed in April 2018.

A programme to modernise the Caijiaying Mine continues with a twin boom electric hydraulic development drill and three fully enclosed cabin, 20 tonne haulage trucks, added to the fleet by the haulage contractor in 2018. The addition of larger capacity haulage trucks has already had a positive benefit with more material being hauled from deeper in the Caijiaying Mine with less truck movements and greater reliability.


Acquisitions and Further Projects

Whilst the Company continues to develop the Caijiaying Mine and explore the surrounding area, the directors and management continue to search for, and investigate the potential acquisition of base metals projects that may be brought into long term, economic production for a capital cost that provides a substantial and justifiable return on equity to shareholders, particularly in a rising commodity price market.

In March 2016 an agreement was entered into between the 3rd Brigade and Hebei Hua Ao, to examine the 3rd Brigade’s extensive database for existing known deposits and prospective mining areas and enter into commercial arrangements on those projects. A further agreement was entered into in December 2016 with the 3rd Brigade to specifically investigate and explore the Shitouhulun licence area (held by the 3rd Brigade) and the Sangongdi area. Both of these areas have considerable potential for mineralisation and are proximal to the Caijiaying Mine.

The company also continues to evaluate other mines and assets in China outside the Hebei Province and in particular Inner Mongolia.

Furthermore, a large number of potential projects have been analysed worldwide. None have been Successfully consummated for many reasons including negative findings during due diligence, an insufficient return calculated for the risk shareholders would need to accept in funding the project to production, overall risk profile and various other deficiencies in grade, tonnes, metallurgy, depth and difficulty in mining.



Zinc is the fourth most valuable metal mined after iron, copper and aluminum. The zinc market currently stands at around 15 million tonnes per annum, of which the majority,  comes from newly mined metal with the balance from recycling. The majority of zinc produced is used for galvanizing steel in various forms to prevent corrosion. Zinc is an essential nutrient for humans and other living things. It can help to reduce illness and improve the health of children, particularly in developing nations where diets may be lacking in zinc. It can also be used in fertilizer to improve crop quality and quantity where soil is zinc deficient

Zinc occurs throughout the world with Canada, Australia, the USA and Peru traditionally providing most of the mined zinc, however, in recent years China has become an important producer having a market share of almost 40% of newly mined zinc. There are few large mines in China and production is dominated by hundreds of small mines. Reliable information on the Chinese zinc mining situation is hard to obtain.

Zinc is one of the world’s most widely used base metals and as global urbanization continues to grow so too will demand for zinc. Zinc is integral for many of the products we rely on in today’s society like automotive parts and construction materials.

The outlook for zinc bodes well for the strategy being pursued by the Company World demand for zinc currently exceeds supply.

In the past few years there has been a limited number of new mines and a series of mine closures (e.g. Glencore Xstrata’s Perseverance and Brunswick mines, Vedanta’s Lisheen operation and MMG’s Century Zinc mine in Australia). This bodes well for the price of zinc and the profitability of zinc producers in the future.