Distinguishing geochemical anomalies from background is a basic task in exploratory geochemistry. The derivation of geochemical anomalies from stream sediment geochemical data and the decomposition of these anomalies ...Distinguishing geochemical anomalies from background is a basic task in exploratory geochemistry. The derivation of geochemical anomalies from stream sediment geochemical data and the decomposition of these anomalies into their component patterns were described. A set of stream sediment geochemical data was obtained for 1 880 km 2 of the Pangxidong area, which is in the southern part of the recently recognized Qinzhou-Hangzhou joint tectonic belt. This belt crosses southern China and tends to the northwest (NE) direction. The total number of collected samples was 7 236, and the concentrations of Ag, Au, Cu, As, Pb and Zn were measured for each sample. The spatial combination distribution law of geochemical elements and principal component analysis (PCA) were used to construct combination models for the identification of combinations of geochemical anomalies. Spectrum-area (S-A) fractal modeling was used to strengthen weak anomalies and separate them from the background. Composite anomaly modeling was combined with fractal filtering techniques to process and analyze the geochemical data. The raster maps of Au, Ag, Cu, As, Pb and Zn were obtained by the multifractal inverse distance weighted (MIDW) method. PCA was used to combine the Au, Ag, Cu, As, Pb, and Zn concentration values. The S-A fractal method was used to decompose the first component pattern achieved by the PCA. The results show that combination anomalies from a combination of variables coincide with the known mineralization of the study area. Although the combination anomalies cannot reflect local anomalies closely enough, high-anomaly areas indicate good sites for further exploration for unknown deposits. On this basis, anomaly and background separation from combination anomalies using fractal filtering techniques can provide guidance for later work.展开更多
With the development of economy and society,China’s comprehensive national strength has been continuously enhanced and its international influence has been increasing.China is shouldering more international responsib...With the development of economy and society,China’s comprehensive national strength has been continuously enhanced and its international influence has been increasing.China is shouldering more international responsibilities and obligations to make greater contributions to building a community of shared future for mankind by“always being a builder of world peace,a contributor to global development,and a defender of the international order”.In March 2015,President Xi Jinping put forward the concept of the Belt and Road Initiative,which not only pointed out the way for Chinese social organizations to participate in international affairs,but also opened up unprecedented opportunities for Chinese social organizations to further participate in global governance.展开更多
In Mid-October,CAFIU and Sri Lanka-China Friendship Association(SLCFA)jointly held the 2015 "Understanding and Cooperation" Dialogue in Colombo,Sri Lanka with the assistance of China Foundation for Peace and...In Mid-October,CAFIU and Sri Lanka-China Friendship Association(SLCFA)jointly held the 2015 "Understanding and Cooperation" Dialogue in Colombo,Sri Lanka with the assistance of China Foundation for Peace and Development.The Dialogue included nationwide young student speech contest and Seminar on展开更多
Distinguished Guests,Ladies and gentlemen,Dear friends,Good afternoon.Let me begin by extending my warmest welcome to all of you to this thematic session on peopleto-people connectivity on behalf of the International ...Distinguished Guests,Ladies and gentlemen,Dear friends,Good afternoon.Let me begin by extending my warmest welcome to all of you to this thematic session on peopleto-people connectivity on behalf of the International Department of the CPC Central Committee,the organizer of this event.Thanks to the concerted efforts展开更多
基金Project(1212010071012) supported by Guangdong Pangxidong Mineral Prospect Investigation, ChinaProject(41004051) supported by the National Natural Science Foundation of ChinaProject ([2007]038-01-18) supported by Nationwide Mineral Resource Potential Evaluation Projects of Ministry of Land and Resources, China
文摘Distinguishing geochemical anomalies from background is a basic task in exploratory geochemistry. The derivation of geochemical anomalies from stream sediment geochemical data and the decomposition of these anomalies into their component patterns were described. A set of stream sediment geochemical data was obtained for 1 880 km 2 of the Pangxidong area, which is in the southern part of the recently recognized Qinzhou-Hangzhou joint tectonic belt. This belt crosses southern China and tends to the northwest (NE) direction. The total number of collected samples was 7 236, and the concentrations of Ag, Au, Cu, As, Pb and Zn were measured for each sample. The spatial combination distribution law of geochemical elements and principal component analysis (PCA) were used to construct combination models for the identification of combinations of geochemical anomalies. Spectrum-area (S-A) fractal modeling was used to strengthen weak anomalies and separate them from the background. Composite anomaly modeling was combined with fractal filtering techniques to process and analyze the geochemical data. The raster maps of Au, Ag, Cu, As, Pb and Zn were obtained by the multifractal inverse distance weighted (MIDW) method. PCA was used to combine the Au, Ag, Cu, As, Pb, and Zn concentration values. The S-A fractal method was used to decompose the first component pattern achieved by the PCA. The results show that combination anomalies from a combination of variables coincide with the known mineralization of the study area. Although the combination anomalies cannot reflect local anomalies closely enough, high-anomaly areas indicate good sites for further exploration for unknown deposits. On this basis, anomaly and background separation from combination anomalies using fractal filtering techniques can provide guidance for later work.
文摘With the development of economy and society,China’s comprehensive national strength has been continuously enhanced and its international influence has been increasing.China is shouldering more international responsibilities and obligations to make greater contributions to building a community of shared future for mankind by“always being a builder of world peace,a contributor to global development,and a defender of the international order”.In March 2015,President Xi Jinping put forward the concept of the Belt and Road Initiative,which not only pointed out the way for Chinese social organizations to participate in international affairs,but also opened up unprecedented opportunities for Chinese social organizations to further participate in global governance.
文摘In Mid-October,CAFIU and Sri Lanka-China Friendship Association(SLCFA)jointly held the 2015 "Understanding and Cooperation" Dialogue in Colombo,Sri Lanka with the assistance of China Foundation for Peace and Development.The Dialogue included nationwide young student speech contest and Seminar on
文摘Distinguished Guests,Ladies and gentlemen,Dear friends,Good afternoon.Let me begin by extending my warmest welcome to all of you to this thematic session on peopleto-people connectivity on behalf of the International Department of the CPC Central Committee,the organizer of this event.Thanks to the concerted efforts
