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Geochemical Characteristics and Prediction of Concealed Ore Body of Wunan Gold Deposit in Shanshan, Xinjiang

Author: ZuoHuiXia
Tutor: YangXingKe
School: Chang'an University
Course: Structural Geology
Keywords: Wu Nan Gold Geochemistry Primary halo Axial zonation Concealed ore forecast
CLC: P618.51
Type: Master's thesis
Year: 2005
Downloads: 304
Quote: 1
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Abstract


Wu Nan gold deposit is located north edge of Tarim block band, is the late Paleozoic continental margin of South Tianshan tectonic units. Regional exploration potential, with gold, copper, iron, salt advantage. Tianshan tectonic belt has been found with other types of gold deposits compared to geological characteristics of the area, mineral assemblages, geochemical characteristics and metallogenic special conditions, such as integrated with stratigraphic and structural ore control conditions. Genesis by type, orebody occurrence and lack of continuity of research and other issues still need to continue research and evaluation. In this paper, multi-disciplinary modern metallogenic theory and methods, combined with Wu Nan Gold Deposit Research and shortcomings in order to observe the geological survey and indoor test data as the basis, in the area, geological and geochemical characteristics of mine and deposit on the basis of analysis and research, summarize its metallogenic conditions and to explore its genesis type. Then, the article further application of geochemical sampling and analysis of characteristics of primary halos deposit, for the first time identified the Wu Nan gold deposits primary halo with axial zonation lateral zonation characteristics, and the establishment of primary halo of the deposit superposition model, reflecting Wu South gold deposit deep echelon occurrence and existence of blind orebodies information. Advances in understanding of specific research and conclusions are as follows: 1, Wu Nan gold deposit hosted in Lower Carboniferous licorice Lake group impure carbonate rocks, obviously controlled by the horizon. Mining structure development, fracture, fold and 伊尔托古什布 Mubarak ductile - brittle shear zone that rock gold mine gold element activation leaching, hydrothermal replacement, migration and enrichment, and in favorable locations precipitation mineralization. Magmatic activity in the area of ??mineralization is not, but generates acidic gold porphyry in space with a certain contact. 2, small size gold minerals deposits, mainly in micro-fine gold, was disseminated distribution. Ore mineral assemblages display - Low Temperature metallogenic characteristics, forming temperature, pressure, and depth of mineralization were also reflected in a low-temperature epithermal deposit feature. Made based on the current physical-chemical conditions and mineralization of relevant information and comprehensive analysis of geological conditions and through domestic and foreign Wu Nan gold deposit geological characteristics of Carlin-type gold deposits in contrast, analysis of the similarities and differences, and explore the genetic type gold deposits. 3, the surface characteristics of primary halos show, Au element anomalies associated with the leading edge of high elements As, Sb, Hg and other medium - weak anomaly and tail elements Bi, Cu, Mo and other high-strength, fully reflects the Wu Nan surface gold deposits orebody by deep erosion, four gold exploration lines expose the lower part of the body shall be such ore deposits. By analyzing the drilling primary halo found that the primary halo deposit axial zonation showing more typical reverse zonation, from the leading edge to the tail were: Bi-Cu-Mo-Sb-Pb-Ag-Au-Hg-As- Zn. Bi, Cu, Mo combination of elements is divided into front, Hg, As, Zn of the tail combination. The sequence may be in the upper part of the body and its primary halo gold relatively strong erosion occurs by lower ore body or tail features and deep mines with blind front element superimposed primary halos results.

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CLC: > Astronomy,Earth Sciences > Geology > Of ore deposits > Deposit classification > Precious metals > Gold
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