Inner Mongolia, Liu dam GOLD genesis and prospecting mineralogy mineralogy

Title: Inner Mongolia, Liu dam GOLD genesis and prospecting mineralogy mineralogy
Author: Zhang Yan
Degree-granting units: China University of Geosciences (Beijing)
Keywords: Genesis;; ore mineralogy;; mineral standard type;; metallogenic prognosis;; Liu dam ditch;; Inner Mongolia
Summary:
Willow Dam gold deposit in Inner Mongolia in the ditch margin of North China, is a typical K-feldspar with extensive development into an important feature of the gold deposit. In this paper, based on the analysis of geological conditions, through the quartz, feldspar and pyrite containing gold and other major causes of mineralogy and mineral prospecting system rare earth magnets mineralogical study of ore-forming hydrothermal sources and mineralization law, and deep mining exploration prospects were predicted.
Pyrite shows the thermoelectric coefficient are N-type conductivity type, formed mainly in the temperature of 310 ℃ ~ 330 ℃. Lattice parameters a0 value is between 0.54167 ~ 0.54214nm, slightly larger than the theoretical value. a0 value increases gradually with increasing depth, and a0 and the host rock of Au grade showed a positive correlation. Pyrite with a strong enrichment of Mo, Pb, a strong loss of Rb, Zr, Nb, Th and other elements of its main features. Pyrite low As, Se content of the standard-type gold deposits of the important features.
Thermal glow curves of quartz mainly a single peak and less Xu Shuangfeng characterized integral intensity is low. Temperature range of heat-emitting T1 (160 ~ 220 ℃) ​​and T2 (220 ~ 280 ℃), and the T2 interval-based. Quartz cell slightly larger than the theoretical value of the parameter values, decreases with elevation above sea level, the cell parameters have corresponding degree of reduction. Quartz was enriched Mo, Pb, As, Sr, Ba and other elements, including Mo + Pb + As content and Au was positively correlated with the relationship. Higher levels of Sr and Ba ore-forming fluids and the rock show had a strong K-feldspar and water-rock interactions.
K-feldspar are in between feldspar and feldspar between the largest or the largest feldspar, potassium feldspar Liu dam ditch ditch a higher degree of order Bi Hada door. Liu dam close to the ditch and K-feldspar mineralization Or is 92.2% ~ 96.2%, Ab 3.8% to 7.8%, and Hada ditch near the same gate.
Closely related to Au mineralization of three of the minerals (pyrite, quartz, feldspar) the basic characteristics of rare earth elements are shown as a http://www.chinamagnets.biz/ very significant positive Eu anomaly, gently inclined to the right type of light REE enrichment, indicating fluid is high, relative reduction characteristics. Their REE patterns with large birch back granite veins are very similar, inferred magmatic hydrothermal mineralization played an important role for the ore-forming hydrothermal type gold deposits in high temperature, K-feldspar enrichment of Au mineralization played an important role.
By pyrite, quartz and potassium feldspar characteristics of the standard model, suggesting that the mining area in the east for the next 313 Vein key areas of exploration, ore body has been exposed at or near the location with alkali account, with account of the upper part of the hydrogen and silicified zone, have already suffered some degree of erosion, the door of the Bi Hada ditch mine geological conditions, that the deep to find this account possibility of altered rock type gold great.
Degree Year: 2010