scholarly journals Research on Ore-controlling factors and Metallogenic Prognosis of Dongchuan Copper Mining Area, Yunnan, China

2017 ◽  
Vol 59 ◽  
pp. 012032
Author(s):  
Tianguo Wang ◽  
Jishun Liu ◽  
Chaowen Huang
Keyword(s):  
Mining Area ◽  
Controlling Factors ◽  
Copper Mining ◽  
Metallogenic Prognosis

scholarly journals Joint MT and Gravity Inversion Using Structural Constraints: A Case Study from the Linjiang Copper Mining Area, Jilin, China

Minerals ◽  
2019 ◽  
Vol 9 (7) ◽  
pp. 407 ◽  
Author(s):  
Rongzhe Zhang ◽  
Tonglin Li ◽  
Shuai Zhou ◽  
Xinhui Deng
Keyword(s):  
Mining Area ◽  
Elastic Net ◽  
Gravity Inversion ◽  
Copper Mining ◽  
Structural Constraints ◽  
L1 Norm ◽  
Elastic Net Regularization ◽  
Gradient Constraints ◽  
Anomalous Bodies ◽  
Best Fit

We present a joint 2D inversion approach for magnetotelluric (MT) and gravity data with elastic-net regularization and cross-gradient constraints. We describe the main features of the approach and verify the inversion results against a synthetic model. The results indicate that the best fit solution using the L2 is overly smooth, while the best fit solution for the L1 norm is too sparse. However, the elastic-net regularization method, a convex combination term of L2 norm and L1 norm, can not only enforce the stability to preserve local smoothness, but can also enforce the sparsity to preserve sharp boundaries. Cross-gradient constraints lead to models with close structural resemblance and improve the estimates of the resistivity and density of the synthetic dataset. We apply the novel approach to field datasets from a copper mining area in the northeast of China. Our results show that the method can generate much more detail and a sharper boundary as well as better depth resolution. Relative to the existing solution, the large area divergence phenomenon under the anomalous bodies is eliminated, and the fine anomalous bodies boundary appeared in the smooth region. This method can provide important technical support for detecting deep concealed deposits.

Lake George as a Sink for Contaminants Derived from the Kilembe Copper Mining Area, Western Uganda

2005 ◽  
Vol 24 (3) ◽  
pp. 114-123 ◽  
Author(s):  
Tina Hartwig ◽  
Michael Owor ◽  
Andrew Muwanga ◽  
Dieter Zachmann ◽  
Walter Pohl
Keyword(s):  
Mining Area ◽  
Copper Mining ◽  
Western Uganda ◽  
Lake George

Mercury methylation in rice paddies and its possible controlling factors in the Hg mining area, Guizhou province, Southwest China

2016 ◽  
Vol 215 ◽  
pp. 1-9 ◽  
Author(s):  
Lei Zhao ◽  
Guangle Qiu ◽  
Christopher W.N. Anderson ◽  
Bo Meng ◽  
Dingyong Wang ◽  
...  
Keyword(s):  
Southwest China ◽  
Mining Area ◽  
Controlling Factors ◽  
Guizhou Province ◽  
Mercury Methylation ◽  
Rice Paddies ◽  
Hg Mining

Research on the Characteristics of Gas Geology in Yongshanqiao Mining Area, Jiangxi Province

2012 ◽  
Vol 164 ◽  
pp. 511-516
Author(s):  
Zhi Gen Zhao ◽  
Ming Ming Zhang ◽  
Jia Ping Yan
Keyword(s):  
Emission Rate ◽  
Mining Area ◽  
Geological Structure ◽  
Controlling Factors ◽  
Jiangxi Province ◽  
Coal Seams ◽  
Gas Emission ◽  
Gas Generation ◽  
Coal Quality ◽  
Geological Factors

The coal and gas outburst is very serious in Yongshanqiao Mining Area of Jiangxi province, so it is of significance to research the characteristics of gas geology and their controlling factors. Based on the statistical analysis of gas data during coal exploration and coal mining, the regularity is revealed of the characteristics of gas geology in Yongshanqiao Mining Area. From east to west and from south to north, the relative gas emission rate and the absolute gas emission rate tend to increase, the frequency and intensity of coal and gas outbursts rise, the gas contents also tend to increase. The controlling factors of characteristics of gas geology in Yongshanqiao Mining Area are researched in this paper. The work reveals that: corresponding to characteristics of gas geology, the distribution characteristics of coal quality, the characteristics of geological structure and the lithology characteristics of the roof and the floor of the coal seams in Yongshanqiao Mining Area present regular changes, and are all favorable to gas generation and gas preservation. So, the characteristics of gas geology in Yongshanqiao Mining Area are the result of comprehensive effects by geological factors

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