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Characteristics of gravity anomalies and prediction of volcanosedimentary boron deposit distribution in the Xiongba area,Tibet |
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| Authors: | Li-Rong Song Chang-Qing Yu Gui-Hua Li Yang-Yang Feng Jun-Jie He |
| Institution: | 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. |
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