Plume IV Conference: Beyond the Plume Hypothesis

将于2003年8月在冰岛举行一次彭罗斯会议，题为“第四次羽流：超越羽流假说”。会议的总体目标是为大型火山区制定替代模式。要做到这一点，将根据自最初提出以来三十年的研究情况对羽流假说进行严格审查，讨论和评估替代模型，并确定该领域今后的主要任务。会议将持续一周，与会者人数限制在60人以内，并以讨论为主。这将是就这一主题举行的第一次会议，并将为一个尚处于萌芽状态的主题-大型火山区的替代机制-提供重点和定义。30年来，人们一直在不加批判地援引羽流假说[Morgan，1971]，以解释黄石公园、夏威夷和冰岛等板内和海脊附近大量、长期存在的火山活动的起源。它被普遍采用作为地质学的基本前提，并在各级教育环境中作为isfact呈现。然而，随着放射性测年和全地幔层析成像等越来越先进的数据的获得，人们越来越清楚地认识到，大型火山区比最初设想的要复杂得多，因此有必要进一步阐述原先简单的地幔柱假说，以便与新的数据相吻合。本次会议将为该主题提供一个基础论坛。

A Penrose Conference "Plume IV: Beyond the Plume Hypothesis" will be run in Iceland, August 2003. The overall objective of the Conference is to develop alternative models for large volcanic provinces. This will be achieved through critical examination of the plume hypothesis in the light of the three decades of research since its original proposal, discussion and assessment of alternative models, and identification of the major tasks ahead in the field. The Conference will last a week, be limited to 60 participants and have a dominantly discussion-based format. It will be the first conference to be held on this subject, and will provide focus and definition to an embryonic subject, that of alternative mechanisms for large volcanic provinces. The plume hypothesis [Morgan, 1971] has been invoked, largely uncritically, for 30 years, to explain the origin of voluminous, long-lived volcanism at intraplate and near- ridge locations such as Yellowstone, Hawaii and Iceland. It is popularly adopted as a fundamental premise of geology and presented as isfactle in educational settings at all levels. However, with the acquisition of ever-superior data, e.g. radiometric ages and whole-mantle tomography, it is becoming increasingly clear that large volcanic areas are far more complex than initially supposed, and it has been necessary to elaborate increasingly the original simple plume hypothesis in order to fit the new data. This conference will provide a foundation forum for the subject.