南海中部海盆海山磁性反演及初步解析

金钟

南海中部海盆海山磁性反演及初步解析

金钟

南京大学, 海岸与海岛开发教育部重点实验室, 江苏, 南京, 210093;国家海洋局海底科学重点实验室, 浙江, 杭州, 310012

基金项目: 国家自然科学基金(49176261);南京大学海岸与海岛开发教育部重点实验室资助项目(SCIEL21101103)

计量
- 文章访问数: 735
- HTML全文浏览量: 12
- PDF下载量: 619
- 被引次数: 0
出版历程
- 收稿日期: 2001-10-10
- 修回日期: 2001-12-24

Inversion magnetic anomalies of seamounts and preliminary analysis in the central basins of the South China Sea

JIN Zhong

摘要

摘要: 南海中部海盆分布着众多海山,从实测磁异常反演海山磁性是南海海盆古地磁研究新的重要课题,它有助于解决南海海盆的运动方向和运动形式等问题.对南海海盆16座海山作磁性反演取得了较高的计算精度.对南海中部海盆海山磁性反演表明,海山均为非均匀磁化体,海山形成经过多期火山喷溢叠加.海山磁性差异清晰地显示了海盆分区特征.南海海盆分东部海盆区和西南部海盐区,海盆地壳运动规律差异较大:东部海盆以逆时针旋转由南往北运移;西南海盆先经历了顺时针旋转,后改为逆时针旋转,由北往南运移.
- 南海 /
- 中部海盆 /
- 海山 /
- 磁性反演
Abstract: There are lots of seamounts in the central basins of the South China Sea.It is, till a new and unportant project in the research on paleo-geomagnetism in the basin to inversion magnetic anomalies of seamount from the measured data on seamount magnetic anomaly, which is helpful to explain the direction of motion and the mules of transformation of the basin of the South China Sea.The magnetic anomalies of 16 seamount, are inversed and a high precision is dot.The results show that these seamounts are heterogeneously magnetized and the seamounts were come into being by heaping rocks during the volcanic activities.Magnetization of these seamounts is different, it implies the feature of the different subarea in the basin of sea.The sea basins are divided into the eastern basin and the southwestern basin.There is very exact and different law of motion.The eastern basin is migrating from south to north by way of anticlockwise revolution and the other is migrating from north to south by way of clockwiar-revolution at first and anticlockwise revolution thereafter.
- South China Sea /
- the central sea basin:seamount mversmn magnetie anomaly /

HTML全文

参考文献(19)

HILDEBRAND J A, PAKER R L. Paleomagnetism of Cretaceous Pacific seamounts revisited[J]. J Geophysics Res, 1987,92:12 695-12 712.

KERTING B, SAGER W. Watkins seamount:preliminary paleomagnetic results[J]. J Geophysics Res, 1980, 85:3 567-3 571.

SAGER W, PRINGLE M. Paleomagnetic constraints on the origin and evolution of the Musicians and South Hawaiian seamounts, central Pacific Ocean[J]. Geophysical Monograph AGU, 1987, 43:133-161.

SAGER W, PRINGLE M. Mid-Cretaceous to early Tertiary apparent polar wander path of the Pacific plate[J]. J Geophysics Res, 1988, 93(B10):11 753-11 771.

何廉声.南海地质地球物理图集[Z].北京:中国地图出版社,1988.

金翔龙,吕文正,何长志,等.南海地球科学研究报告[R].东海海洋,1989,7(4):10-19

PLOUFF D. Gravity and magnetic fields of polygonal prisms and application to magnetic terrain corrections[J]. Geophysics,1976, 41:727-741.

TALWANI M. Computation with the help of a digital computer of magnetic anomalies caused by bodies of arbitrary shape[J]. Geophysics, 1965, 30:797-817.

VACQUIER V. Geomagnetism in Marine Geology[M]. Amsterdam:Elsevier Publishing Company, 1972. 163-168.

VINE F J, MCNAB R. A program for fitting the magnetic effect of three dimensional structure to an observed anomaly by calculating the required magnetization vector[J]. BIO Computer, 1967,7(c).

PARKER R L. A statistical theory of seamount magnetism[J]. J Geophysics Res, 1988, 93:3 105-3 115.

徐世浙,吴铭先.海山磁性的反演[J].海洋学报,1987,9(5):589-593

金庆焕.南海地质与油气资源[M].北京:地质出版社,1989.

徐世浙.古地磁学概论[M].北京:地震出版社,1982

鲍才旺,薛万俊.南海深海平原海山、海丘分布规律及形成环境[J].海洋学报,1993,15(6):83-90.

HARRISON C G A. A seamount with a nonmagnetic top[J]. Geophysics, 1971, 36:349-357.

徐世浙,邢天文.海山磁性反演精度的研究[J].海洋学报,1993,15(3):73-79

国家海洋局第二海洋研究所和国家海洋局南海分局.南海中部重磁水深调查报告.国家海洋局海洋情报研究所出版,1985.

吴金龙等.中法南海地质地球物理联合调查报告.国家海洋局第一海洋研究所(内刊),1985.

施引文献

资源附件(0)

访问统计

计量

文章访问数: 735
HTML全文浏览量: 12
PDF下载量: 619
被引次数: 0

姓名
邮箱
手机号码
标题
留言内容
验证码

留言板