Correlation Analysis Method and its Application to Interpretation of Regional Gravity and Magnetic Anomalies in Eastern Xinjiang, China

Abstract:

Based on detailed analysis of Bouguer gravity anomaly and magnetic anomaly by reduced to the pole, this paper uses correlation analysis method to analyze regional gravity and magnetic anomalies of different filter scales, including filter scales of 50km, 90km, and 130km, and then discusses the contributing factors of local gravity and magnetic anomalies in eastern Xinjiang. The results show that regional gravity and magnetic anomalies are cogenetic anomalies in some areas, such as Hangou, and northern Lamamiao, Jingrquan, and western Qijiaojing, gravity and magnetic anomalies are allogenic anomalies in other areas. The study reveals that regional negative gravity anomalies are chiefly caused by Cenozoic – Mesozoic with larger thickness and lower density, and regional positive magnetic anomalies are mainly caused by Precambrian metamorphic basement with stronger magnetic property uplifting in Turpan – Hami and Santanghu basin. Mantle substances uplifting mainly cause regional positive gravity and magnetic anomalies in Junggar basin. Regional positive gravity anomalies are mainly caused by Pre-Mesozoic with higher density uplifting, and regional negative magnetic anomalies are chiefly caused by sedimentary formation and intermediate acidity rock with larger thickness and weaker magnetism and Precambrian metamorphic basement.

• Periodical: Advanced Materials Research (Volumes 546-547)
• Pages: 628-633
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.546-547.628
• Online since: July 2012
• Authors: Chun Guan Zhang, Bing Qiang Yuan, Yu Hong Li
• Keywords: Correlation Analysis, Eastern Xinjiang, Geologic Interpretation, Magnetic Anomalies, Precambrian Metamorphic Basement, Regional Gravity

References

[1] Z. Q. Deng: Xinjiang. Xinjiang Geology, Vol. 20(2002), pp.320-325 (In Chinese).

[2] D. R. Zhang, and G. R. Zheng: Xinjiang Geology, Vol. 5(1987), pp.92-98 (In Chinese).

[3] Y. C. Wang: Xinjiang Petroleum Geology, Vol. 18(1997), pp.295-301 (In Chinese).

[4] Z. W. Wang: Xinjiang Geology, Vol. 4(1986), pp.107-114 (In Chinese).

[5] D. Z. Zhuang: Jilin University, Changchun(2005), (In Chinese).

[6] C. M. Han: China University of Geosciences, Beijing(2002), (In Chinese).

[7] Z. Q. Gao: Central South University, Changsha(2002), (In Chinese).

[8] C. W. Zhang: Journal of Chengdu Institute of Technology, Vol. 21(1994), pp.1-10 (In Chinese).