The role of arc migration in the development of the Lesser Antilles: A new tectonic model for the Cenozoic evolution of the eastern Caribbean

Allen R. W.; Collier J. S.; Stewart A. G.; Henstock T.; Goes S.; Rietbrock A.; Macpherson Colin; Blundy Jon; Davidson Jon; Harmon Nick; Kendall Mike; Prytulak Julie; Rychert Catherine; Van Hunen Jeroen; Wilkinson Jamie; Wilson Marjorie

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The role of arc migration in the development of the Lesser Antilles: A new tectonic model for the Cenozoic evolution of the eastern Caribbean

机译：弧迁移在较小安利克斯发展中的作用：东加勒比东部新生代演化的新构造模型

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Continental arc systems often show evidence of large-scale migration both toward and away from the incoming plate. In oceanic arc systems, however, while slab roll-back and the associated processes of backarc spreading and arc migration toward the incoming plate are commonplace, arc migration away from the incoming plate is rarely observed. We present a new compilation of marine magnetic anomaly and seismic data in order to propose a new tectonic model for the eastern Caribbean region that includes arc migration in both directions. We synthesized new evidence to show two phases of backarc spreading and eastward arc migration toward the incoming Atlantic. A third and final phase of arc migration to the west subdivided the earlier backarc basin on either side of the present-day Lesser Antilles arc. This is the first example of regional multidirectional arc migration in an intra-oceanic setting, and it has implications for along-arc structural and geochemical variations. The back and forth arc migrations were probably due to the constraints imposed by the neighboring American plates on this isolated subduction system, rather than variations in subducting slab buoyancy.

机译：大陆电弧系统通常显示出朝向和远离进料板的大规模迁移的证据。然而，在海洋电弧系统中，虽然板坯回卷和朝向输入板的弧形扩散和弧形迁移的相关过程是常见的，但很少观察到远离输入板的电弧迁移。我们展示了海洋磁性异常和地震数据的新汇编，以提出包括在两个方向上的弧形迁移的东加勒比地区的新构造模型。我们综合了新的证据，以显示两阶段的反向大西洋的反向蔓延和东弧迁移。西部的第三个和最后一个阶段的弧形迁移细分了当今较小的安妥尔斯弧的两侧的早期后弧盆地。这是在海洋内部环境中区域多向电弧迁移的第一个例子，它对弧形结构和地球化学变化具有影响。由于该隔离的俯冲系统上的邻近的美国板施加的约束，而不是邻近的俯冲系统的约束，而不是底板浮力浮力的变化。

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《Geology》 |2019年第9期|共5页
作者
Allen R. W.; Collier J. S.; Stewart A. G.; Henstock T.; Goes S.; Rietbrock A.; Macpherson Colin; Blundy Jon; Davidson Jon; Harmon Nick; Kendall Mike; Prytulak Julie; Rychert Catherine; Van Hunen Jeroen; Wilkinson Jamie; Wilson Marjorie;
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Imperial Coll London Dept Earth Sci &

Engn London SW7 2BP England;

Imperial Coll London Dept Earth Sci &

Engn London SW7 2BP England;

Univ Bristol Sch Earth Sci Bristol BS8 1RL Avon England;

Natl Oceanog Ctr Ocean &

Earth Sci Southampton SO14 3ZH Hants England;

Imperial Coll London Dept Earth Sci &

Engn London SW7 2BP England;

Karlsruhe Inst Technol Geophys Inst D-76131 Karlsruhe Germany;

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正文语种 eng
中图分类地质学;
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1. The role of arc migration in the development of the Lesser Antilles: A new tectonic model for the Cenozoic evolution of the eastern Caribbean [J] . Allen R. W., Collier J. S., Stewart A. G., Geology . 2019,第9期

机译：弧迁移在较小安利克斯发展中的作用：东加勒比东部新生代演化的新构造模型
2. New radiolarian assemblages from La Desirade Island basement complex (Guadeloupe, Lesser Antilles arc) and Caribbean tectonic implications [J] . Cordey F, Cornee JJ Bulletin de la Societe Geologique de France . 2009,第5期

机译：La Desirade岛地下室群（瓜德罗普岛，安的列斯群岛弧）的新放射虫组合和加勒比构造意义
3. New radiolarian assemblages from La Desirade Island basement complex (Guadeloupe, Lesser Antilles arc) and Caribbean tectonic implications [J] . Fabrice Cordey, Jean-Jacques Cornée Bulletin de la Societe Geologique de France . 2009,第5期

机译：La Desirade岛地下室综合体（瓜德罗普岛，安的列斯群岛）的新放射虫组合和加勒比构造意义
4. The Plate Tectonic Evolution of the Caribbean Plate in the Mesozoic and Early Cenozoic [C] . Martin Meschede, Wolfgang Frisch, Ana Leyla Chinchilla Chaves, International Geological Congress . 2000

机译：中生代和早期新生代加勒比板的板构造演化
5. Tectonic studies of the Caribbean: Pure GPS Euler vectors to test for rigidity and for the existence of a Northern Lesser Antilles Forearc block; constraints for tsunami risk from reassessment of the April 1, 1946 Alaska-Aleutians and August 4, 1946 Hispaniola events. [D] . Lopez, Alberto M. 2006

机译：加勒比地区的构造研究：纯GPS欧拉向量，用于测试刚度和北部小安的列斯群岛前臂地块的存在；重新评估1946年4月1日的阿拉斯加-阿留申群岛和1946年8月4日的西班牙裔事件对海啸风险的限制。
6. Compression-extension transition of continental crust in a subduction zone: A parametric numerical modeling study with implications on Mesozoic-Cenozoic tectonic evolution of the Cathaysia Block [O] . Xuran Zuo, Lung Sang Chan, Jian-Feng Gao -1

机译：俯冲带内地壳的压缩扩展作用过渡：对华夏地块中新生代构造演化的参数化数值模拟研究
7. Discovery of Lower Cretaceous synmetamorphic thrust tectonics in French Lesser Antilles (La Désirade Island, Guadeloupe): Implications for Caribbean geodynamics [O] . Corsini M., Lardeaux J.-M., Verati C., 2011

机译：在法国小安的列斯群岛（瓜德罗普岛拉西西拉德岛）发现下白垩统共形逆冲构造：对加勒比地球动力学的启示
8. Virgin Islands Biosphere Reserve. Research Report No. 5. Trends in Recreational Boating in the British Virgin Islands, a Preliminary Assessment of Impact from Human Activities on Anchorages and Development of a Monitoring Program for Safe Anchorages. Research Report No. 6. Geographic Range and Research Plan for Monitoring White Band Disease. Research Report No. 7. Marine Ecosystems of the Lesser Antilles--Identification of Representative Sites [R] . Lund, H. , Anderson, M. , Gladfelter, E. , 1986

机译：维尔京群岛生物圈保护区。研究报告第5号。英属维尔京群岛休闲游艇的趋势，人类活动对锚地影响的初步评估以及安全锚地监测计划的制定。研究报告第6号。监测白带病的地理范围和研究计划。研究报告第7号。小安的列斯群岛海洋生态系统 - 代表性遗址的识别

The role of arc migration in the development of the Lesser Antilles: A new tectonic model for the Cenozoic evolution of the eastern Caribbean

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