The Varzaghan district at the northwestern margin of the Urumieh–Dokhtar magmatic arc, is considered a promising area for the exploration of porphyry Cu deposits in Iran. In this study we identified mono-and multi-el...The Varzaghan district at the northwestern margin of the Urumieh–Dokhtar magmatic arc, is considered a promising area for the exploration of porphyry Cu deposits in Iran. In this study we identified mono-and multi-element geochemical anomalies associated with Cu–Au–Mo–Bi mineralization in the central parts of the Varzaghan district by applying the concentration–area fractal method. After mono-element geochemical investigations, principal component analysis was applied to ten selected elements in order to acquire a multi-element geochemical signature based on the mineralization-related component. Quantitative comparisons of the obtained fractal-based populations were carried out in accordance with known Cu occurrences using Student's t-values. Then,significant mono-and multi-element geochemical layers were separately combined with related geologic and structural layers to generate prospectivity models, using the fuzzy GAMMA approach. For quantitative evaluation of the effectiveness of different geochemical signatures in final prospectivity models, a prediction-area plot was adapted. The results show that the multi-element geochemical signature of principal component one(PC1) is more effective than mono-element layers in delimiting exploration targets related to porphyry Cu deposits.展开更多
This article analyzes the 4C(Customer,Cost,Convenience,Communication)strategy from the perspective of marketing,and explores its application in the job hunting process of college students,aiming to provide effective s...This article analyzes the 4C(Customer,Cost,Convenience,Communication)strategy from the perspective of marketing,and explores its application in the job hunting process of college students,aiming to provide effective strategies for college students to break through in job hunting competitiveness.By regarding themselves as"products",college students can enhance their competitiveness as"product"attributes in the job market by starting from meeting the needs of employers,reasonably positioning their own value,expanding job search channels,and effectively promoting themselves.展开更多
文摘The Varzaghan district at the northwestern margin of the Urumieh–Dokhtar magmatic arc, is considered a promising area for the exploration of porphyry Cu deposits in Iran. In this study we identified mono-and multi-element geochemical anomalies associated with Cu–Au–Mo–Bi mineralization in the central parts of the Varzaghan district by applying the concentration–area fractal method. After mono-element geochemical investigations, principal component analysis was applied to ten selected elements in order to acquire a multi-element geochemical signature based on the mineralization-related component. Quantitative comparisons of the obtained fractal-based populations were carried out in accordance with known Cu occurrences using Student's t-values. Then,significant mono-and multi-element geochemical layers were separately combined with related geologic and structural layers to generate prospectivity models, using the fuzzy GAMMA approach. For quantitative evaluation of the effectiveness of different geochemical signatures in final prospectivity models, a prediction-area plot was adapted. The results show that the multi-element geochemical signature of principal component one(PC1) is more effective than mono-element layers in delimiting exploration targets related to porphyry Cu deposits.
文摘This article analyzes the 4C(Customer,Cost,Convenience,Communication)strategy from the perspective of marketing,and explores its application in the job hunting process of college students,aiming to provide effective strategies for college students to break through in job hunting competitiveness.By regarding themselves as"products",college students can enhance their competitiveness as"product"attributes in the job market by starting from meeting the needs of employers,reasonably positioning their own value,expanding job search channels,and effectively promoting themselves.
