麦哲伦海山链漂移史及可能的来源
The research on the drifting history and possible origin of the Magellan seamount trail
-
摘要: 麦哲伦海山链主要由十多座相对独立的平顶海山组成,呈北西向展布于太平洋海山密集区。结合前人对麦哲伦海山链形成和漂移的认识,从板块运动和几何学角度出发采用backtracking和hot-spotting海山追踪方法对该区海山的起源与形成进行了研究,结果表明,麦哲伦海山链是多热点成因的板内火山和板块构造运动共同作用的产物,最初于白垩纪期间由法属玻利尼西亚热点群西侧呈北北西向排列的热点活动产生,继而受到板块运动与区内近南北向和北北东向两组断裂及其热活化等的改造作用,最后形成了现今看到的平顶海山。
-
关键词:
- 麦哲伦海山链 /
- backtracking方法 /
- hot-spotting方法 /
- 法属玻利尼西亚热点群
Abstract: The Magellan seamount trail includes tens of isolated guyots trending EW.A backtracking method and a hot-spotting method were used to trace the Magellan seamount trail from the movement of a plate and its geometry based on previous studies in this region. The result shows that the Magellan seamount trail is the collective products of intraplate volcanism originating from multiple hot spots and plate tectogenesis. The Magellan seamount trail is derived from the present French Polynesian hot spots trending NNW during the Cretaceous. They are also affected by the activity of two fracture zones, which trend SN and NNW, and thermal activity with the movement of the plate. Finally the present Magellan seamount trail is formed. -
WILSON J T. A possible origin of the Hawaiian Islands [J]. Can J Phys, 1963, 41: 863—870. MORGAN W J. Deep mantle convection plumes and plate motions [J]. Am Assoc Petrol Geol Bull, 1972, 56: 203—213. 姚德,梁宏锋,张丽洁. 太平洋中部多金属结核元素地球化学研究[J]. 海洋地质与第四纪地质, 1991, 11(增刊): 67—124. FOULGER G R, NATLAND J H. Is "Hotspot" volcanism a consequence of plate tectonics? [J]. Science, 2003, 300: 921—922. WESSEL P, KROENKE L W. A geometric technique for relocating hot spots and refining absolute plate motions [J]. Nature, 1997, 387: 365—369. WESSEL P, KROENKE L W. The geometric relationship between hot spots and seamounts: implications for Pacific hot spots [J]. Earth and Planetary Science Letters, 1998, 158: 1—18. KEATING B H. Summary of radiometric ages from the Pacific . IOC Tech Ser 32.Paris: UNESCO, 1987:1—67. WESSEL P, LYONS S. Distribution of large Pacific seamounts from Geosat/ ERS21: implications for the history of intraplate volcanism [J]. J Geophys Res, 1997, 102(B10): 22459—22476. SMOOT N C. Orthogonal intersections of megatrends in the western Pacific Ocean Basin: a case study of the mid-Pacific mountains[J]. Geomorphology, 1999, 30: 323—356. CLAGUE D A, JARRARD R D. Tertiary Pacific plate motion deduced from the Hawaiian-Emperor chain [J]. Geol Soc Am Bull, 1973, 84: 1135—1154. EPP D. Age and tectonic relationships among volcanic chains on the Pacific plate . Honolulu: Univ of Hawaii, 1978. DUNCAN R A, CLAGUE D A. Pacific plate motion recorded by linear volcanic chains [M]//The Ocean Basins and Margins:the Pacific Ocean 7A. New York: Plenum Press, 1985:89—121. HARRISON C G A, JARRARD R D, VACQUIER V, et al. Paleomagnetism of Cretaceous Pacific seamounts[J]. Geophys J R Astron Soc, 1975, 309: 753—757. GORDON R G. Late Cretacous apparent polar wander of the Pacific plate: evidence for a rapid shift of the Pacific hotspots with respect to the paleomagnetic axis [J]. Geophys Res Lett, 1983, 10: 709—712. HILDEBRAND J A, PARKER R L. Paleomagnetism of Cretaceous Pacific seamounts revisited [J]. J Geophys Res, 1987, 92: 12695—12712. SAGER W W, HANDSCHUMACHER D W, HILDE T W C, et al. Tectonic evolution for the northern Pacific plate and Pacific-Farallon-Izanagi triple junction in the Late Jurassic and Early Cretaceous,M21-M10[J]. Tectonophysics, 1988, 155: 345—364. HOUTZ R E, LUDWIG W J. Distribution of reverberant subbottom layers in the southwest Pacific Basin [J]. J Geophys Res, 1979, 84: 3497—3504. WATTS A B, BODINE J H, RIBE N M, Observations of flexure and the geological evolution of the Pacific Ocean Basin[J]. Nature, 1980, 283: 532—537. HILDEBRAND J A, STAUDIGEL H. Seamount magnetic polarity and Cretacous volcanism of the Pacific Basin [J]. Geology, 1986, 14: 456—458. KOPPERS A A P, STAUDIGEL H, WIJBRANS J R, et al. The Magellan seamounts trail: implications for Cretaceous hotspot volcanism and absolute Pacific plate motion [J]. Earth and Planetary Science Letters, 1998, 163: 53—68. SMITH W H F, STAUDIGEL H, WATTS A B, et al. The Magellan seamounts: Early Cretaceous record of the south Pacific isotopic and thermal anomaly [J]. J Geophys Res, 1989, 94(B8): 10501—10523. KOPPERS A A P, STAUDIGEL H, CHRISTIE D M, et al. Sr-Nd-Pb isotope geochemistry of Leg 144 west Pacific guyots: implications for the geochemical evolution of the "SOPITA" mantle anomaly //HAGGERTY J A, PREMOLI Silva I, RACK F, et al.Proc ODP Sci Results, 144: College Station, TX(Ocean Drilling Program).USA:Texas A and M University Digital Library,1995:535—545. KOPPERS A A P, STAUDIGEL H, PRINGLE M S, et al. Shorted-lived and discontinuous intraplate volcanism in the south Pacific: hot spots or extensional volcanism? [J]. Geochemistry Geophysics Geosystems, 2003, 4(10):1—49. 赵俐红,高金耀,金翔龙,等. 中太平洋海山群漂移史及其来源[J]. 海洋地质与第四纪地质, 2005, 25(3): 35—42. WESSEL P, SMITH W H F.The general mapping tools (GMT),Version 4.0.technical reference and cook book, SOEST .(2004-10-01),http://gmt.soest.hawaii.edu.
点击查看大图
计量
- 文章访问数: 1740
- HTML全文浏览量: 1
- PDF下载量: 1438
- 被引次数: 0