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2024 Vol. 45, No. 5
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LI Gongda, YE Chuanyong, ZHAO Yuanyi, CHEN Shouming, YAN Qunxiong, WANG Luohai. 2024. Study on Porosity and Specific Yield of Qarhan Salt Lake Solid Potassium Mine in Qinghai Province Based on Industrial CT. Acta Geoscientica Sinica, 45(5): 757-768,I0002. doi: 10.3975/cagsb.2024.080901
Citation: LI Gongda, YE Chuanyong, ZHAO Yuanyi, CHEN Shouming, YAN Qunxiong, WANG Luohai. 2024. Study on Porosity and Specific Yield of Qarhan Salt Lake Solid Potassium Mine in Qinghai Province Based on Industrial CT. Acta Geoscientica Sinica, 45(5): 757-768,I0002. doi: 10.3975/cagsb.2024.080901
shu

Study on Porosity and Specific Yield of Qarhan Salt Lake Solid Potassium Mine in Qinghai Province Based on Industrial CT

  • 1. School of Earth Sciences and Resources, China University of Geosciences, Beijing 100083;

  • 2. MNR Key Laboratory of Salt Lake Resources and Environments, Institute of Mineral Resources, Chinese Academy of Geological Sciences, Beijing 100037;

  • 3. MNR Salt Lake Field Observation and Research Station of Xizang Plateau, Institute of Mineral Resources, Chinese Academy of Geological Sciences, Beijing 100037;

  • 4. Institute of Geology, Chinese Academy of Geological Sciences, Beijing 100037;

  • 5. Qinghai Salt Lake Industry Co., Ltd., Golmud, Qinghai 816000

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  • Corresponding author: YE Chuanyong  
Received Date:  30 May 2024
Revised Date:  30 July 2024
    Abstract
  • Potash is a strategic key mineral resource in China, and the Qarhan Salt Lake is the largest potash production base in the country.Potash raw materials are mainly from the solid-liquid transformation of solid potash ore.Porosity and specific yield are the key indicators for evaluating of the solid-liquid transformation of potash in Qarhan Salt Lake.In this study, accurate porosity and specific yield values of Qarhan Salt Lake solid potassium deposit were obtained for the first time by using by industrial CT technology, and the dynamic characteristics and causes of the results were preliminarily studied.The main conclusions of the study are as follows: (1) Industrial CT can efficiently, intuitively, and nondestructively measure the porosity and specific yield of solid potassium ore.(2) The average porosity of the Qarhan Salt Lake solid potassium deposit is 16.49%, and the average specific yield is 10.21%.The porosity decreases gradually from the first layer to the third layer.It rises slightly in the fourth layer but still shows a decreasing trend.The average value of specific yield also decreases gradually from the first layer to the fourth layer.In a specific mining area, the maximum and minimum values of porosity and specific yield are located at different hole depths, which are mainly caused by the heterogeneity of lithology.(3) The porosity (17.12%) in the Bieletan area is lower than it was in 2007 (20.64%), whereas the specific yield (10.58%) is higher than it was in 2007 (9.56%), indicating that the formation specific holding capacity was reduced and the brine storage capacity weakened, which may be related to the arid climate conditions and solid-liquid transformation.This study provides a scientific basis for evaluating the carrying capacity of the Qarhan solid potassium mine resources and a reference method and idea for the evaluation of salt deposits with similar geological conditions.
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