105 Tons of Gold Resource Amounts Have Been Newly Discovered in Tongbai Mountain,Henan Province

In September 2016, the Department of Land and Resources of ttenan Province announced that the First Geological Exploration Institute of Henan Bureau of Geo- Exploration ＆ Mineral Development had recently discovered a new104.96-ton gold resource, with 122.034 tons of associated silver and also abundant natural soda and lead-zinc mineral resources in the deep and peripheral areas of the Laowan gold deposit in Tongbai County.

Application of Prognosticating Methods of Placer Gold Resources——Taking the Upper Regions of the Nenjiang River as an Example

On the basis of analysing and studyingthe mineralizing conditions and content ratinglaws, the authors infer the geology and oresnear old placers by applying the remote sens-ing technology and analogous method,

Current Gold Prospecting in China

In China, there are 12 types of gold deposits in 57 class-Ill metallogenic zones, formed in 7 main metaUogenic periods. Most gold deposits are small or occur as ore spots; very large deposits are rare with relatively poor quality, mainly medium to low grade. Only 35% of the total gold reserves is identified, while a large amount of reserves is yet to be identified. In recent years, China Geological Survey has organized or conducted mineral resources survey and evaluation project, replacement resources prospecting for deposits in crisis, old mines prospecting and commercial prospecting funded or encouraged by the Central Government. These efforts have been fruitful. According to the temporal and spatial allocation of gold resources, and experiences from recent prospecting efforts, western China and the deep layers and peripheries of the-sits in eastern China have relatively high prospecting potential. The government should give even more support to the gold industry and strengthen technological innovation to help address difficulties in gold exploitation and processing. The government should also formulate consistent plans, consolidate mining rights, and promote integrated exploration, so as to achieve new major breakthroughs in gold prospecting. Gold is both a form of material wealth and a way of storing wealth. It is a rare resource with dual functions of commodity and currency. As an important global strategic asset and a cornerstone of financial reserves, gold plays an irreplaceable role in securing national economic development, maintaining financial security, strengthening national comprehensive power and promoting RMB internationalization. Based on latest research and prospecting results, the thesis proposes preliminary conclusions on types, temporal and spatial allocation, and exploration and development of gold deposits in China; predicts China＇s gold resource potential; reviews recent gold prospecting and exploration efforts; and, in the hope of offering some reference for the new round of gold prospecting, exploration and planning, offers some suggestions.

A portable and washable solar steam evaporator based on graphene and recycled gold for efficient point-of-use water purification

A solar steam evaporator provides a sustainable and efficient alternative water purification solution to address the global freshwater shortage.Previous efforts have made significant advances in maximizing its water evaporation rate,but no single evaporator has all the properties necessary for practical point-of-use application,including a high efficiency for generation of drinkable water,an excellent portability critical for on-site water purification,good washability for mitigating evaporator fouling,and good reusability.We report a strategy to produce a high-performance photothermal material for point-of-use water purification.By simultaneously incorporating graphene and gold particles grown from recycled electronic waste in a mechanically strong sponge,we achieved highly efficient water purification under realistic conditions.In addition to a high evaporation rate(3.55 kg/m^(2)/h under one-sun irradiation)attributed to a control of atomic structure of graphene and the size-dependent surface plasmon resonance of gold nanoparticles,it is portable which can be folded,vacuum compacted,dried and rehydrated without compromising performance.It also allows repeated washing to remove contaminant fouling so that it can be reused.The evaporator transforms various types of contaminated water into drinkable clean water,and can be mounted at any angle to optimize the incident solar irradiation.Furthermore,the assembled steam evaporator device could gain purified water meeting the World Health Organization drinking water standards with a high evaporation rate of 9.36 kg/m^(2)/h under outdoor sunlight.