Characteristics of gravity anomalies and prediction of volcanosedimentary boron deposit distribution in the Xiongba area, Tibet
Song Li-Rong1,2, Yu Chang-Qing2, Li Gui-Hua1, Feng Yang-Yang2,3, and He Jun-Jie4
1. School of Earth Sciences and Engineering, Shandong University of Science and Technology, Qingdao 266510, China.
2. Institute of Geology, Chinese Academy of Geological Sciences, Beijing 100037, China.
3. School of National Land Resource and Engineering, Kunming University of Technology, Kunming 650093, China.
4. Tuha Division of Geophysical Exploration, BGP, China National Petroleum Corporation, Hami 839009, China.
Abstract：
Volcanosedimentary boron deposits are present within Tertiary lacustrine sediments and volcanic rocks in Xiongba, Tibet. Boron deposits are characterized by low density relative to country rocks; thus, it is possible to locate them by gravity measurements. We conducted a 1:50000 high-precision gravity survey in the Xiongba area, Tibet, and obtained the Bouguer and residual gravity anomalies. We analyzed fault systems and the distribution of sedimentary and volcanic rocks and their relation to the volcanosedimentary boron deposits. The processing of the gravity data revealed local gravity variations and fault structures. We applied preferential downward continuation and wavelet transform to the gravity data, and in conjunction with geological data, we predicted the distribution of volcanosedimentary boron deposits.
Song Li-Rong,Yu Chang-Qing,Li Gui-Hua et al. Characteristics of gravity anomalies and prediction of volcanosedimentary boron deposit distribution in the Xiongba area, Tibet[J]. APPLIED GEOPHYSICS, 2015, 12(4): 516-522.
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2015, Vol. 12 
