| 两种不同类型大陆边缘的初步研究 |
| |
| 引用本文： | 王述功,刘忠臣,吴金龙.两种不同类型大陆边缘的初步研究[J].海洋与湖沼,1996,27(6):577-583. |
| |
| 作者姓名： | 王述功 刘忠臣 吴金龙 |
| |
| 作者单位： | 国家海洋局第一海洋研究所!青岛,266003,国家海洋局第一海洋研究所!青岛,266003,国家海洋局第一海洋研究所!青岛,266003 |
| |
| 基金项目： | 中国第三次南极考察暨首次环球科学考察项目!102101 |
| |
| 摘 要： | １９８６年１０月－１９８７年５月,中国第三次南极考察暨首次环球科学考察的实测重力资料表明,太平洋型活动陆缘重力异常面貌复杂,空间异常变化剧烈,处于极度不均衡状太民。用ｓｉｎｘ／ｘ法反演了 莫氏面深度,利用水层和地壳引起的垂直引力之和与实测的空间异常之差反演了软流层顶界的深度。
|
| 关 键 词： | 大陆边缘 重力异常 构造活动 应力状态 大洋构造 |
| 收稿时间： | 1995/9/11 0:00:00 |
| 修稿时间： | 1996/7/31 0:00:00 |
A PRELIMINARY STUDY ON THE TWO DIFFERENT TYPES OF CONTINENTAL MARGIN |
| |
| Wang Shugong,Liu Zhongchen and Wu Jinlong.A PRELIMINARY STUDY ON THE TWO DIFFERENT TYPES OF CONTINENTAL MARGIN[J].Oceanologia Et Limnologia Sinica,1996,27(6):577-583. |
| |
| Authors: | Wang Shugong Liu Zhongchen and Wu Jinlong |
| |
| Institution: | First Institute of Oceanography, SOA, Qigdao 266003;First Institute of Oceanography, SOA, Qigdao 266003;First Institute of Oceanography, SOA, Qigdao 266003 |
| |
| Abstract: | The third Chinese Antarctic Expedition and the First Global Scientific Investigation were successfully conducted in the period from October, 1986 to May,1987, during which a team from the First Institute of Oceanography, State Oceanic Administration, carried out the a gravity survey yielding about. 52780 kilometers of gravity profile across the Pacific, Indian and Atlantic Oceans. The above data were used for the Pacific active continental margin and Atlantic passive continental margin study. On the Pacific active continental margin gravity anomalies appear very complicated, and free-air anomalies change greatly, suggesting a state of non-equilibrium. The conversion result shows that the cold asthenosphere sinks in large scale along trenches and ocean-sides and hot asthenosphere rises greatly along the arc-back area. On both sides of are and trench, the large scale differential movement of asthenospheric materials scale contributes to the strong tectonic activities of the Pacific active continental margin, leading to a non-equilibrium state. Compared with the Pacific active continental margin the Atlantic passive margin is characterised by monotonous gravity anomalies with positive and negative unsymmetry resulting from the "boundary effect of the earth's crust". It lacks a massive lifting and sinking movement of asthenospheric materials and other tectonic activities suggeste an equilibium state there. |
| |
| Keywords: | Continental margin Gravity anomaly Tectonic activity Stress state Oceanic tectonics |
| 本文献已被 CNKI 维普 等数据库收录！ |
| 点击此处可从《海洋与湖沼》浏览原始摘要信息 |
| 点击此处可从《海洋与湖沼》下载免费的PDF全文 |
|
