1 School of Geosciences,Yangtze University,Wuhan 430100,China; 2 Research Institute of Exploration and Development,Northwest Oilfield Company,SINOPEC,Urümqi 830011,China; 3 Research Institute of Exploration and Development,Xinjiang Oilfield Company,PetroChina,Xinjiang Karamay 834000,China
Abstract：The epidote is the dominant component of heavy minerals and its content changes greatly in Baikouquan formation, Xiazijie fan area, Mahu sag, Junggar Basin. In this paper, we use heavy mineral, energy spectrum, scanning electron microscopy and other data, with the help of multivariate statistical methods such as cluster analysis, correlation analysis and so on, to systematically study the distribution characteristics and genesis of epidote. The results indicated that:(1)Based on the content of epidote, the study area can be divided into high value area, medium value area and low value area. (2)The high value area is located on the fan delta front, while the medium and low value area are on fan delta plain. The low value area is more proximal to the source than the medium value area. (3)The high value area shows an abundance of magmatic and authigenic epidotes, whereas the medium value area only has magmatic epidote. The low value area is mainly caused by the subsequent tectonic uplift and erosion of strata, which led to the leaching of epidote during sediment transportation and deposition.
Zhao Kang,Chai Ming-Rui,Zhu Rui et al. Distribution characteristics and genesis of epidote from the Triassic Baikouquan Formation in Xiazijie fan area, Mahu sag,Junggar Basin[J]. JOPC, 2019, 21(6): 925-938.
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