Lamprophyres, lamproites and related rocks as tracers to supercontinent cycles and metallogenesis

L. Krmíček, N. V. C. Rao
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引用次数: 11

Abstract

Abstract Proterozoic to Cenozoic lamprophyres, lamproites and related rock types hold a unique potential for the investigation of processes affecting mantle reservoirs. They originated from primary mantle-derived melts that intruded both cratons and off-craton regions, which were parts of former supercontinents – Columbia, Rodinia and Gondwana–Pangaea. Well known for hosting economic minerals and elements such as diamonds, base metals, platinum-group elements and Au, they are also significant for our understanding of deep-mantle processes, such as mantle metasomatism and mantle plume–lithosphere interactions, as well as large-scale geodynamic processes, including subduction-related tectonics and supercontinent amalgamation and break-up. This Special Publication presents an overview of the state of the art and recent advances as achieved by individual research groups from different parts of the world, and outlines future research directions. Mineralogical, geochemical, geochronological and isotope analyses are used to decipher the complex petrogenetic and metallogenetic evolution of these extraordinary rocks and unravel a complete history of tectonic events related to individual supercontinent cycles. The Special Publication including this introductory chapter also deals with some issues related to the classification of these rocks.
煌斑岩、煌斑岩及相关岩石作为超大陆旋回和成矿作用的示踪剂
元古代至新生代煌斑岩、煌斑岩及其相关岩石类型在研究影响地幔储层的过程中具有独特的潜力。它们起源于侵入克拉通和离克拉通区域的原始地幔熔融体,这些区域是前超级大陆的一部分-哥伦比亚,罗丁尼亚和冈瓦纳-泛大陆。它们以含有钻石、贱金属、铂族元素和金等经济矿物和元素而闻名,对我们理解地幔深部过程(如地幔交代作用和地幔柱-岩石圈相互作用)以及大型地球动力学过程(包括与俯冲有关的构造和超大陆合并和破碎)也具有重要意义。本特别出版物概述了来自世界不同地区的个别研究小组所取得的最新进展,并概述了未来的研究方向。矿物学、地球化学、年代学和同位素分析用于破译这些特殊岩石的复杂成岩和成矿演化,并揭示与单个超大陆旋回相关的完整构造事件历史。包括这一导论章节在内的特别出版物还讨论了与这些岩石分类有关的一些问题。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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