Many prospectors who find specimens of rich quartz with visible gold often wonder about the gold content of their specimens. Pieces with significant visible gold can sometimes be found at hard rock mines, by prospecting with a metal detector, or in rivers by dredging. The value of these ...
in nature even though it is one of the scarcer metals. Very commonly, gold occurs as the native metal encased within quartz. Sometimes the gold is in a finely divided state, sometimes in particles of considerable size, as nuggets, grains, scales, plates, threads and wires in quartz rock....
Gold nuggets occur predominantly in quartz veins, and the current paradigm posits that gold precipitates from dilute (<1 mg kg−1 gold), hot, water ± carbon dioxide-rich fluids owing to changes in temperature, pressure and/or fluid chemistry. However, the widespread occurrence of la...
Fluid Inclusion and Sulfur Isotope Study on the Donggualin Gold Deposit in the Ailaoshan Gold Belt[J]. Rock and Mineral Analysis, 2017, 36(4): 430-439. doi: 10.15898/j.cnki.11-2131/td.201701060002 Citation: Xiang-ke ZHOU, Jian-guo WANG, Yin-chun LIU, Guang-jing LI, Heng-yong LEI...
Hydrothermal wall-rock alteration and formation of the gold-bearing quartz-fuchsite vein at the Dome Mine, Timmins area, Ontario, Canada Moritz RP, Crocket JH (1991) Hydrothermal wall-rock alteration of the gold-bearing quartz-fuchsite vein at the Dome mine, Timmins Area, Ontario, Canada......
The Tianziping gold deposit in West Qinling orogenic belt is an altered rock type gold deposit with gold-bearing quartz veinlets and quartz stockworks.The authors selected hydrothermal zircon in the gold-bearing quartz vein for metallogenic epoch research.Some of the zircons were corroded with no ...
The shape of the Si02 concentration line, exhibiting a low adjacent to quartz bodies, and increasing in value outward toward the wall rock, indicates that Si02 has migrated toward the present site of the quartz bodies. The chemical evidence strongly suggests that C02 and H20 from min-eral...
Different gold-coated sorbents for amalgamation were applied for the determination of inorganic mercury in waters using a home-made cold vapor generation unit coupled to atomic absorption spectrometry. Among the gold-coated materials investigated (quartz wool, alumina, silica, sand and carbon fiber) qu...
Metamorphic fluid flow at the Pingfengshan historic gold mine was focussed in well-defined (4km 3 ) fracture zones with networks of quartz veins, whereas large surrounding volumes of rock are largely unveined. Gold and arsenopyrite occur in several superimposed vein generations, with ankeritic ...
Figure 7.Development characteristics of quartz veins in the Changgou gold mining area and the adjacent brittle-ductile shear zone DSZ3 下载:全尺寸图片幻灯片 王新(2017)通过对长沟矿区及周邻地区石英脉进行期次划分和测量统计,认为S2期石英脉走向主要集中于270°-320°,少量为50°-70°,与韧性剪切带走向一...