Geochemical and geological characteristics indicate the wolframite mineralization for seeking the type of wolframite mine in Vau village and ajacent area (Dong Giang district, Quang Nam province)
1 Vietnam Institute of Sciences and Mineral Resources, Vietnam
2 Federal State Institution of Science Far East Geological Institute, Vladivostok, Russia
- Received: 18th-Mar-2022
- Revised: 2nd-July-2022
- Accepted: 12th-Aug-2022
- Online: 31st-Oct-2022
- Section: Geology - Mineral
Wolfram mineralization in the area of Vau village (Dong Giang district, Quang Nam province) is distributed along the small stream together with other sulfide mineralizations in the form of small to large boulders. Ore minerals are mainly sheelite, pyrhotite, arsenopyrite a little of chalcopyrite and pyrite. The ore is distributed in stockwork type in the gray, light gray metamorphic sedimentary rocks with quartz - mica composition alternated with quartz feldspar mica schist, sericite schist and sericitized schist of the A Vuong formation (Sequene 3). Sheelite exists in the area manifested by hornflization and bezeritization. Ajacent area have weak skarnation. They have manifestations of the wolframite deposit of skarn type. Geochemical characteristics: W in the ore reaches 2,323 ppm (0.023%), As - 110,366 ppm (1.10%), Co - 212.3 ppm, related granite (Ba Na block’s granite) reaching 1,517 ppm wofram situated at the edge of the magma block (fine-grained alaskite, similar to the composition of boulders in the ore strip). There is small-grained granite with a content of 794 ppm at the center of mass. Thus, the two granite types have high level of metallogical specialization of wolframite (Ktt = 397 is fine-grained granite and Ktt = 758.7 is alaskite Granite). Besides, this rock has metallogical specialization of As (277.4 ppm in fine-grained granite, 29.9 ppm in alaskite).
Cat, N.H., (ed), (1996). Report on geological mapping and mineral prospecting of the Hoi An-Da Nang sheet groups at 1:50,000 scale. Center for Information, Archives and Journal of Geology, General Department of Geology and Mineral Resources. (in Vietnamese).
Einaudi, M.T., (1982). Descriptions of skarns associated with porphyry copper plutons. In: Titley SR (ed). Advances in geology of porphyry copper deposits, southwestern North America, University of Arizona Press, pp 185-210.
Nguyen, V.N., (ed), (2019). Research on molybdenum geochemical specialization of the Ba Na granitoid type and their Mo mineralization potential. Ministry-level topics, code TNMT.2016. 03.05, Ministry of Science and Technology, Hanoi. (in Vietnamese).