Citation: | YANG Bo, ZHAO Yuanyi. New progress in the study of the Oyu Tolgoi porphyry deposit in southern Mongolia[J]. Geological Bulletin of China, 2017, 36(1): 90-111. |
The Oyu Tolgoi deposit, one of the largest porphyry Cu (Au) deposits in the world, is characterized by high copper and gold reserves, high grade, wide range and large scale mineralization of the orebody. China-Mongolia border extends for 80km, which belongs to China's "One Belt, One Road" project and hence is one of the important directions for the going out policy of China's enterprises. On the basis of the information collected and analyzed by the authors, it is considered that North Heruga region, Javkhlant region, West Hugo deep region, West Hugo deep region, Ulaan Khud northern region are five strategic targets. On such a basis, the authors set up a metallogenic model. The authors hold that the Oyu Tolgoi deposit is located in the metallogenic belt which extents along the Kazakh-Mongolian magmatic arc to the two ends. In the west, the belt extends through the Tuwu copper deposit of Xinjiang to the Kounrad porphyry copper deposit and another porphyry copper deposit in the territory of Kazakhstan; in the east, it extends to Duobaoshan and Tongshan area within the territory of China.
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Traffic location of Oyu Tolgoi
Tectonic, regional and local geological setting of the Oyu Tolgoi porphyry Cu-Au deposit, Mongolia
Representative geological cross section and long section through the Hugo Dummett deposit of the Oyu Tolgoi porphyry Cu-Au system, Mongolia
Partial mineralization in Oyu Tolgoi
Chondrite-normalized REE patterns of the samples
Zircon grain age of samples from Oyu Tolgoi
Initial 207Pb/204Pb versus 206Pb/204Pb and 208Pb/204Pb versus 206Pb/204Pb plots showing analytical results for plutonic and volcanic rocks from Oyu Tolgoi and surrounding areas
Alteration patterns of Oyu Tolgoi region extracted by ASTER SWIR-BRLO models
Enlarged image of the Oyu Tolgoi ore district (a) and simplified bed-rock alteration (b)
Igneous rocks mapping result of the Oyu Tolgoi area extracted by ASTER TIR-BRLO models
Mineralization model
Metallogenic prospective area
Simplified tectonic map of the Altay and Transbaikal-Mongolian orogenic collages in central Eurasia, showing the location of selected porphyry Cu-Au/Mo deposits, after removal of Mesozoic-Cenozoic basins and superficial cover
Nb/Yb-Th/Yb diagram (a) and Yb-Ta diagram (b) of the ore-bearing rock mass of the main porphyry copper deposits in Central Asia metallogenic domain