Origin of clinopyroxene megacrysts in volcanic rocks from the North China Craton: a comparison study with megacrysts worldwide
文献类型：期刊论文
| 作者 | Liu, Ya-Dong1,2,3; Ying, Ji-Feng1,3 |
| 刊名 | INTERNATIONAL GEOLOGY REVIEW
 |
| 出版日期 | 2019-09-08 |
| 页码 | 17 |
| ISSN号 | 0020-6814 |
| 关键词 | Clinopyroxene megacryst host basalt trace element Sr-Nd isotopes North China Craton |
| DOI | 10.1080/00206814.2019.1663766 |
| 英文摘要 | Clinopyroxene megacrysts in volcanic rocks can provide substantial information on the evolution of the magmatic system at depth. Although considerable attention has been paid to these crystals, their origin is not yet completely resolved. The clinopyroxene megacrysts worldwide can be divided into two major types in general: the green Cr-diopside type and the black Al-augite type. There is a consensus view that the Cr-diopside megacrysts are mantle xenocrysts, whereas two contrasting opinions exist regarding the origin of the black Al-augite megacrysts. One favours a cognate origin, viewing them as crystallization products of the host magmas under high-pressure; while the other argues that they are xenocrysts crystallized from previous alkali basalts or fragments of mantle peridotites, pyroxenites or pegmatite veins. A review study on the clinopyroxene megacrysts in Meso-Cenozoic volcanic rocks from the North China Craton (NCC) and their comparison with those worldwide provides new constraints on their origin, namely, the Cr-diopside megacrysts, as previously thought, are all xenocrysts, representing disaggregated clinopyroxene crystals from clinopyroxene-rich mantle rocks. Contrary to the formerly proposed cognate origin, the Al-augite megacrysts are also xenocrysts, having no direct genetic link to their host rocks. They crystallized from melts that have formed earlier than the host magmas, and probably accumulated in a magma chamber or occurred as sheets or veins filling a fracture network surrounding a magma chamber in the upper mantle. During the subsequent eruption of the host lavas, these previously formed crystals were incorporated into the magma and were brought up to the surface. |
| WOS关键词 | HIGH-PRESSURE MEGACRYSTS ; LOWER CRUSTAL XENOLITHS ; TRACE-ELEMENT GEOCHEMISTRY ; MANTLE-DERIVED XENOLITHS ; SIZE DISTRIBUTION CSD ; GRIB KIMBERLITE PIPE ; NEW-SOUTH-WALES ; ALKALI-BASALTS ; PYROXENITE XENOLITHS ; PERIDOTITE XENOLITHS |
| 资助项目 | National Natural Science Foundation of China[41688103] ; National Natural Science Foundation of China[41873036] ; National Natural Science Foundation of China[41473035] |
| WOS研究方向 | Geology |
| 语种 | 英语 |
| 出版者 | TAYLOR & FRANCIS INC |
| WOS记录号 | WOS:000485459800001 |
| 资助机构 | National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/93595]  |
| 专题 | 地质与地球物理研究所_岩石圈演化国家重点实验室 |
| 通讯作者 | Ying, Ji-Feng |
| 作者单位 | 1.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China 2.Univ Chinese Acad Sci, Coll Earth & Planetary Sci, Beijing, Peoples R China 3.Chinese Acad Sci, Inst Earth Sci, Beijing, Peoples R China |
| 推荐引用方式 GB/T 7714 | Liu, Ya-Dong,Ying, Ji-Feng. Origin of clinopyroxene megacrysts in volcanic rocks from the North China Craton: a comparison study with megacrysts worldwide[J]. INTERNATIONAL GEOLOGY REVIEW,2019:17. |
| APA | Liu, Ya-Dong,&Ying, Ji-Feng.(2019).Origin of clinopyroxene megacrysts in volcanic rocks from the North China Craton: a comparison study with megacrysts worldwide.INTERNATIONAL GEOLOGY REVIEW,17. |
| MLA | Liu, Ya-Dong,et al."Origin of clinopyroxene megacrysts in volcanic rocks from the North China Craton: a comparison study with megacrysts worldwide".INTERNATIONAL GEOLOGY REVIEW (2019):17. |
入库方式： OAI收割
来源：地质与地球物理研究所
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