Efect of faceting on olivine wetting properties
文献类型：期刊论文
| 作者 | Huang, Yongsheng3,5,6; Nakatani, Takayuki2,3; Sawa, Sando3; Wu, Guoji4,5,6; Nakamura, Michihiko3; McCammon, Catherine1 |
| 刊名 | AMERICAN MINERALOGIST
 |
| 出版日期 | 2023-12-01 |
| 卷号 | 108期号:12页码:2244-2259 |
| 关键词 | Dihedral angle faceted plane Miller index crystallographic orientation permeability anisotropy mantle wedge |
| ISSN号 | 0003-004X |
| DOI | 10.2138/am-2022-8808 |
| 英文摘要 | Grain-scale pore geometry primarily controls the fluid distribution in rocks, affecting material transport and geophysical response. The dihedral angle (theta) in the olivine-fluid system is a key parameter determining pore fluid geometry in mantle wedges. In the system, curved and faceted olivine-fluid interfaces define theta, resulting in faceted-faceted (FF), faceted-curved (FC), and curved-curved (CC) angles. The efect of faceting on theta under various pressure and temperature (P-T) conditions and fluid compositions, however, has not been constrained, and mineralogical understanding remains unresolved. This study evaluated facet-bearing theta and their proportions in olivine-multicomponent aqueous fluid systems. Our results show that 1/3 of olivine-fluid theta are facet-bearing angles, regardless of the P-T conditions and fluid composition. Faceting produces larger dihedral angles than CC angles. The grain boundary plane (GBP) distribution reveals that the GBPs of faceted interfaces at triple junctions have low Miller index faces ({100}, {010}, and {101}). The misorientation angle/axis distributions of adjacent grain pairs are in accord with a theoretical distribution of random olivine aggregate. Moreover, the calculation of the FF angles for adjacent grain pairs with low Miller index GBPs reproduces measured angle values based on the olivine crystal habit. Therefore, our study suggests that the FF angle is strongly afected by olivine crystallography. The presence of faceting increases theta and a critical fluid fraction (phi(c)) for percolation, lowering permeability. In the mantle wedge, where olivine crystallographic preferred orientation (CPO) is expected owing to corner flow, increasing the FF angle proportion with associated changes in fluid pore morphology will lead to permeability anisotropy, and controlling the direction of the fluid flow, and it will result in geophysical anomalies such as seismic wave attenuation and high electrical conductivity. |
| WOS研究方向 | Geochemistry & Geophysics ; Mineralogy |
| 语种 | 英语 |
| WOS记录号 | WOS:001197201200008 |
| 源URL | [http://ir.gig.ac.cn/handle/344008/77109]  |
| 专题 | 同位素地球化学国家重点实验室 |
| 通讯作者 | Huang, Yongsheng |
| 作者单位 | 1.Univ Bayreuth, Bayer Geoinst, D-95440 Bayreuth, Germany 2.Geol Survey Japan, AIST Cent 7,Higashi I-1-1, Tsukuba, Ibaraki 3058567, Japan 3.Tohoku Univ, Grad Sch Sci, Dept Earth Sci, Sendai, Miyagi 9808578, Japan 4.Univ Chinese Acad Sci, Coll Earth & Planetary Sci, Beijing 100049, Peoples R China 5.Chinese Acad Sci, Guangzhou Inst Geochem, State Key Lab Isotope Geochem, Guangzhou 510640, Peoples R China 6.CAS Ctr Excellence Deep Earth Sci, Guangzhou 510640, Peoples R China |
| 推荐引用方式 GB/T 7714 | Huang, Yongsheng,Nakatani, Takayuki,Sawa, Sando,et al. Efect of faceting on olivine wetting properties[J]. AMERICAN MINERALOGIST,2023,108(12):2244-2259. |
| APA | Huang, Yongsheng,Nakatani, Takayuki,Sawa, Sando,Wu, Guoji,Nakamura, Michihiko,&McCammon, Catherine.(2023).Efect of faceting on olivine wetting properties.AMERICAN MINERALOGIST,108(12),2244-2259. |
| MLA | Huang, Yongsheng,et al."Efect of faceting on olivine wetting properties".AMERICAN MINERALOGIST 108.12(2023):2244-2259. |
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。