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| The application of integrated geophysical and geochemical methods to the prospecting in the Tianjingwo tungsten polymetallic ore deposit |
| CHEN Wei1, ZHOU Xing-Peng2, HE Gen-Wen1, LI Wei1 |
1.South Jiangxi Geological Surveying Party, Jiangxi Bureau of Geology and Mineral Resources, Ganzhou 341000, China;
2. Geophysical-Geochemical Exploration Institute of Shanxi, Yuncheng 044004, China |
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Abstract In order to cooperate with deep prospecting in the Jiulongnao orefield, the authors carried out combined profile and area measurement of geophysical-geochemical integrated exploration technique and delineated "one belt (east-west contact zone of Guting limestone and Jiulongnao complex massif) and three areas (Ⅰ, Ⅱ, Ⅲ anomaly)" as the most favorable metallogenic zone. Drilling verification disclosed multi-layered stratiform and granite contact zone skarn type tungsten polymetallic orebodies 1.62~19.37 m in thickness. Consequently, a geophysical-geochemical comprehensive prospecting model for this area was built up, characterized by "two-lows and three-highs". The two-lows are low gravity and low apparent resistivity, whereas the three-highs refer to high ΔT, high apparent polarization and high amounts of chemical substances (W, Sn, Bi, As, Sb, Hg etc.) in the earth. The tungsten polymetallic mineralization in the area was closely related to magmatic activities in Yanshanian period, and mineralization was controlled jointly by strata, magmatic activity and structure. Therefore, the selection of survey areas must be chosen around granite boby or hidden granite with strong responses to low gravity and fault structure with strong Hg anomaly in soil. Based on the above understanding, it is pointed out that the depth of the southern part of the area has metallogenic potential in that it is equipped with optimum coupling of formation (Guting limestone)-structure (F1, F2 fault)-magmatic rock (deep concealed granite) , thus having favorable metallogenetic conditions.
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Received: 18 May 2016
Published: 20 August 2017
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