Layered intrusions: Fundamentals, novel observations and concepts, and controversial issues
文献类型：期刊论文
| 作者 | Latypov, R. M.6; Namur, O.5; Bai, Y.4; Barnes, S. J.2; Chistyakova, SYu6; Holness, M. B.3; Iacono-Marziano, G.1; Kruger, W. A. J.6; O'Driscoll, B.11; Smith, W. D.10 |
| 刊名 | EARTH-SCIENCE REVIEWS
 |
| 出版日期 | 2024-02-01 |
| 卷号 | 249页码:79 |
| 关键词 | Magma chambers Mafic layered intrusions Fundamentals Novel observations and concepts Controversial issues Magma crystallization differentiation solidification mineral deposits Future directions of research |
| ISSN号 | 0012-8252 |
| DOI | 10.1016/j.earscirev.2023.104653 |
| 英文摘要 | Layered intrusions are fossilized natural laboratories that historically have constrained many fundamental principles of igneous petrology. Layered intrusions are typically stratiform, usually sill-like bodies of cumulate rocks, at least a few hundred metres to as much as 10 km thick, characterized by the presence of a variety of different types of layering over a range of length scales. They are the solid record of crystallization, differentiation and solidification processes of mainly basaltic magmas. The importance of layered intrusions also lies in hosting a significant proportion of the world's known reserves and resources of important critical metals: particularly, the majority of the global resource of platinum-group elements (PGE), chromium (Cr) and vanadium (V) and also very large resources of nickel (Ni), copper (Cu) and cobalt (Co). This paper summarizes the progress that has been made in the study of layered intrusions during the last three decades. The progress is marked by a number of novel observations from layered intrusions. Among them are: (1) draping of igneous layering over a few-km-high sloping step in the chamber floor; (2) development of igneous layering on the overturned to undercutting portions of a chamber floor; (3) magmatic karstification of the floor cumulates, (4) existence of threedimensional framework of crystals in (oxide) cumulates; (5) systematic variations in dihedral angles between touching grains, and other microtextural features; (6) Cr-rich structures at the base of magnetitite layers; (7) coexistence of melt inclusions of contrasting composition in minerals; (8) thermal and chemical histories recorded by plagioclase; (9) textural and chemical features of minerals revealed by X-ray microscopy, (10) intrusion-scale to mineral-scale isotopic heterogeneity; (11) out-of-sequence zircon ages; and (12) skeletal/dendritic growth of minerals revealed by minor element zonation. The progress is also evident from development of several new concepts and refinement of some established ones. These include: (1) time and length scales in layered intrusion processes, (2) catastrophically fast growth of magma chambers, (3) out-of-sequence emplacement in layered intrusions, (4) large-scale slumping and mineral sorting in layered intrusions, (5) production of monomineralic cumulates from single phase-saturated melts, (6) origin of non-cotectic cumulate by in situ growth, (7) the arrival of new phases on the liquidus, (8) inward propagation of solidification fronts, (9) mushy and hard chamber floor, (10) absence of roof sequences due to their disruption, (11) basal reversals and chilled margins, (12) adcumulus growth theory, (13) compositionally stratified magma chambers, (14) melt-sediment interactions during magma chamber growth, (15) lateral reactive infiltration in a crystal mush, (16) reactions involving conjugate immiscible liquids in crystal mushes, and (17) constraints on subsolidus processes from non-traditional Fe-Mg-Cr stable isotopes. Finally, we show that the major controversies regarding layered intrusions currently revolve around whether: (a) the microstructure of igneous rocks are primary or secondary , (b) compaction in layered in-trusions is pervasive or non-existent (c) large, long-lived and entirely-molten magma chambers exist or not. The review shows that layered intrusions provide ground-truth information on the processes of magma crystalliza-tion, differentiation , solidification in crustal chambers as well as on mechanisms of ore-forming elements concentration into economically viable mineral deposits. We propose a few lines for future research that may potentially raise igneous petrology to a new level of understanding of the processes that govern the evolution of terrestrial magmatic systems. |
| WOS研究方向 | Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:001165828800001 |
| 源URL | [http://ir.gig.ac.cn/handle/344008/77391]  |
| 专题 | 中国科学院广州地球化学研究所 |
| 通讯作者 | Latypov, R. M. |
| 作者单位 | 1.Univ Orleans BRGM, CNRS, Orleans, France 2.CSIRO Mineral Resources, Perth, WA, Australia 3.Univ Cambridge, Cambridge CB2 3EQ, England 4.Chinese Acad Sci, Inst Geol & Geophys, Beijing, Peoples R China 5.Katholieke Univ Leuven, B-3001 Leuven, Belgium 6.Univ Witwatersrand, Johannesburg, South Africa 7.Univ Liege, Liege, Belgium 8.Chinese Acad Sci, Guangzhou Inst Geochem, Guangzhou, Peoples R China 9.Univ Helsinki, Helsinki, Finland 10.Carleton Univ, Ottawa, ON, Canada |
| 推荐引用方式 GB/T 7714 | Latypov, R. M.,Namur, O.,Bai, Y.,et al. Layered intrusions: Fundamentals, novel observations and concepts, and controversial issues[J]. EARTH-SCIENCE REVIEWS,2024,249:79. |
| APA | Latypov, R. M..,Namur, O..,Bai, Y..,Barnes, S. J..,Chistyakova, SYu.,...&Charlier, B..(2024).Layered intrusions: Fundamentals, novel observations and concepts, and controversial issues.EARTH-SCIENCE REVIEWS,249,79. |
| MLA | Latypov, R. M.,et al."Layered intrusions: Fundamentals, novel observations and concepts, and controversial issues".EARTH-SCIENCE REVIEWS 249(2024):79. |
入库方式： OAI收割
来源：广州地球化学研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。