Application of Multivariate Statistics and Geostatistical Techniques to Identify the Distribution Modes of the Co, Ni, As and Au-Ag ore in the Bou Azzer-East Deposits (Central Anti-Atlas Morocco)

• 발행기관: 대한자원환경지질학회
• 저자명: Muhammad Souiri Mohamed Aissa Joaquim Gó is Rachid Oulgour Hafid Mezougane Mohammed El Azmi Azizi Moussaid
• 간행물 정보: 『자원환경지질』53권 4호, 363~381쪽, 전체 19쪽
• 주제분류: 자연과학 > 지질학
• 파일형태: PDF
• 발행일자: 2020.08.30

영문 초록

The polymetallic Co, Ni, Cu, As, Au, and Ag deposits of Bou Azzer East are located in the western part of the Bou Azzer inlier in the Central Anti Atlas, Morocco. Six stages of emplacement of the mineralization have been identified. Precious metals (native gold and electrum) are present in all stages of this deposit except the early nickeliferous stage. From the Statistical analysis of the Co, As, Ni, Au, and Ag contents of a set of 501 samples, shows that the Pearson correlation coefficient between As-Co elements (0.966) is the highest followed by that of the Au-Ag couple (0.506). Principal component analysis (PCA) and hierarchical ascending classification (HAC) of the grades show, that Ni is associated with the pair (As-Co) and Cu is rather related to the pair (Au-Ag). The kriging maps show that the highest values of the Co, As and Ni appear in the contact of the serpentinite with other facies, as for those of Au and Ag, in addition to anomalous zones concordant with those of Co, Ni and As, they show anomalies at the extreme South and North of the study area. The development of the anomalous Au and Ag zones is mainly along the N40-50°E and N145°E directions.

목차

1. Introduction

2. Geological Setting

3. Sampling and Analytical Methods

4. Mineralization in the Bou Azzer East deposit

5. Statistical and Geostatistical Analysis

6. The Ascendant Hierarchical Classification

7. Kriging

8. Discussion

9. Conclusion

Acknowledgments

References

키워드

mineralogy multivariate statistics geostatistical Au-Ag polymetallic deposit bou azzer east