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 It is the first sedimentary stratum above the regional metamorphic crystalline basement and consists of a formation of marginal-littoral-foreshore terrigenous clastic rocks and carbonate sediments with regional metamorphism ranging from low hornblende facies to high greenschist facies.
Chalcopyrite fills gaps and/or fissures in mesograined pyrite and is symbiotic with native gold, electrum, pyrite, galena, sphalerite, stephanite and proustite, forming crystals and embedding structure.
The No. 9 vein zone is located 3 m to 40 m east of and parallel to the No. 8 vein gradually diverges to the north. It has a strike length of 310 m bearing 25º-50º dipping steeply SE at 58º-78º and with a width ranging from 0.5-1.00 m. Exploration has shown the mineralization as weaker and quite wide. Underground exploration encountered erratic mineralization and only one sample (0.2 m long) assaying 1.46 g Au/t, exceeded the current cutoff grade. The gold grade in all other samples was less than or equal to 0.29 g Au/t.
9号矿脉带位于8号矿脉东40m,与其平行,向北部逐渐分支。走向长310m,走向25º-50º,倾向南东,倾角较陡58º-78º。宽度变化范围为0.5-1.00 m.。勘探表明矿化较弱但宽度大。地下勘探揭露矿化不稳定,只有一个样品(0.2m长)的分析结果超过了当前最低边界品位,1.46 克/吨。其他样品的金品位均不超过0.29 克/吨。
The general model of the gold mineralization at the NMA property is believed by Prof. Chen to be one of gold and poly-metallic mineralization related to the hydrothermal systems (mesothermal-epithermal) associated with the underlying magmatic and subsequent tectonic activity related to the intrusive and extrusive volcanic activity associated with early and late Jurassic volcanism. Satellite data interpretation supports the general model of one or more a caldera ring complexes with both radial NNW and concentric ENE fault systems.
While WGM agrees with this general model, during the site visits and tours of the ENE trending adit noticeable increases in mineral content and alteration was observed associated with cross cutting NNW trending structures. Furthermore all of the mineralization being exploited on the neighbouring (to the east and north east) Real Gold mine, is derived from NNW bearing fault structures. The remote sensing images, also shows these NNW faults. Such multidirectional mineralized structures are common for mineralization related to caldera structures and ring fracture systems.


Exploration surveys focused on the underground levels of Vein No. 8, 4th (873 m), 5th (832 m) and 6th (793 m). 
The detail surveys (Table 8) included: 1) establishing survey control; 2) topographic measurements; 3) geological surveys; 4) geological section profiles; 5) electrical surveys; 6) preparation of plans and sections from all underground workings; 7) systematic sampling of mineralized bodies, gold-bearing alteration zones, ceilings (backs) and floors; 8) near surface trenching; 9) diamond drilling; 10) engineering geotechnical studies; and 11) collection of various samples for chemical analysis and metallurgical test work.  The field work was finished in December of 2008 and the indoor data processing and the final reporting was completed during from January to April of 2009 producing a Chinese style feasibility study for the proposed development of the gold deposit. 
Detailed grid mapping is 20-40×40 m in bedrock areas, and less in areas of quaternary cover.  In the former mining area, the altered fracture zones greater than 0.5 m, the geological units of greater than 20 m length and the structural fracture zones, are all captured on the map.  The scale of the geological profiles is 1:1,000.
Trenches were dug to a maximum depth of 3 m, to test the surface mineralization.  The mineralized zone and related alteration zones were all channel sampled.  Sampling was either on the side wall or in the base of the trench and sketches (profiles) of both were prepared the scale of 1:100. 
There is a predetermined format for grid line numbering such that it is consistent everywhere.  All samples are identified with specified nomenclature, such as drill hole numbers are all prefixed by ZK (e.g.) for easier identification in the national data base.  Individual sample numbers whether adit trench samples or drill core samples are prefixed by H. 


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