Solubility of titanium dioxide in ultrahigh-temperature metamorphic minerals at high pressures and high temperatures to calibrate the geothermobarometer for ultrahigh-temperature granulites

高压高温下二氧化钛在超高温变质矿物中的溶解度，用于校准超高温麻粒岩地温气压计

• 批准号: 17540455
• 负责人: KAWASAKI Toshisuke
• 金额: $ 2.47万
• 依托单位: Ehime University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2005
• 资助国家: 日本
• 起止时间: 2005 至 2007
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-17540455/
• 关键词: ultrahigh-temperature metamorphism; East Antarctica; eclogite; quartz; garnet; trthopvroxene; Ti-thermometer; itemnerature-denendence of Fes+ in ouartz; 斜方輝石; Fe^<3+>温度圧力性; TiO_2固溶反応; 石英地質温度計; 超高温グラニュライト; Ti地質温度計; 難溶性元素の分配; Raoultの法則; Henr

The solubility of titanium dioxide of garnet and orthopyroxene was investigated at pressures 7-25 kbar and temperatures 850-1300℃. The two granulites: (1) orthopyroxene granulite from McIntyre, Napier Complex; and: (2) the silimanite-cordierite-sapphirine granulite from Rundvagshetta, Lutzow-Holm Complex, were used in the present experiments. A glass starting material was prepared as: the mixture of the powdered McIntyre granulite + 8 wt% SiO_2 + 16 wt% TiO_2 + 8 wt% Al_2O3 was fused at 10 kbar and 1500℃ for 1 minute and quenched (MCTQ). Another stating material was a powdered Rundvagshetta granulite containing 2 wt% of 1102 (RVH). Run durations were 64 to 952 hours. We used the Mo/Pt double capsule or AuPd capsule. The present investigation provided following results: (1) Ti in garnet and orthopyroxene substitutes for the tetrahedral Si and never substitutes for Mg, Fe and AI; (2) the solubility of TiO_2 increases with temperature as In(X^<Grt>_T√X ^<Grt>_<Si>)=-15366/T+5.962 for garn … More et and In(X^<opx>_T√X^<opx>_Ti)=-11367/T+3.107 for orthopyroxene; (3) these thermometer is very useful to estimate the retrograde temperatures where rutile would exsolve; (4)Ti in garnet decreases with pressure although Ti in orthopyroxene increases with pressure. These were published at The 10th International Symposium on Antarctic Earth Science (ISAES2007), Santa Barbara, University of California. From the aid of the descriptive petrology, we proposed the empirical thermometer Ti in quartz as T(℃)=-5895/(InX〓_<TiO2>+1.729)-273. This thermometer is now in press in the Journal of the Geological Society of London, Special Issue. We analyzed the metamorphic processes of the ultrahigh-temperature granulites in detail. During the petrographic analyses we found the Fe^<3+> in quartz increases with temperature. Experiments on the solubility of Fe^<3+> in silica minerals were carried out at temperatures 990-1440℃ in the air. We obtained the found the content of ferric iron in quartz increases with increasing pressure and temperature: InX_<Fe> =(-1092-5.254T +7.75P)IT, where X_<Fe>, T and P are the number of Fe atoms in quartz per formula unit based on a 2-oxygen atom normalization(cationic mole fraction of Fe), temperature in Kelvin and pressure in kbar, respectively. This new geothermometer is applied to the ultrahigh-temperature metamorphosed quartz-magnetite rock from Mt. Riiser-Larsen area, Napier Complex, East Antarctica, resulting that the metamorphic temperatures are estimated as about 994-1095℃ for pressures 5-15 kbar. Less

在压力7-25 kbar，温度850-1300℃下，研究了石榴石和斜方辉石中二氧化钛的溶解度。这两种麻粒岩：（1）McIntyre，纳皮耶杂岩体中的斜方辉石麻粒岩和（2）Rundvagshetta，Lutzow-Holm杂岩体中的硅线石-堇青石-蓝闪石麻粒岩。制备了一种玻璃原料：将McIntyre麻粒岩粉末+8wt%SiO_2 +16wt%TiO_2 +8wt%Al_2O_3的混合物在10 kbar和1500℃下熔融1分钟并淬火（MCTQ）。另一种状态材料是含有2wt%的1102（RVH）的粉末状Rundvagshetta麻粒岩。运行持续时间为64至952小时。我们使用Mo/Pt双胶囊或AuPd胶囊。研究结果表明：（1）石榴石和斜方辉石中的Ti取代了四面体Si，而未取代Mg、Fe和Al;（2）TiO_2的溶解度随温度的升高而增加，石榴石和斜方辉石的溶解度满足In（X^<Grt>_T &lt;$X ^<Grt>_<Si>）=-15366/T+5.962 ...更多信息 （<opx><opx>3）这些温度计对于估算金红石的退溶温度是非常有用的;（4）石榴子石中的Ti随压力的增加而减少，而斜方辉石中的Ti随压力的增加而增加。这些论文发表在加州大学圣巴巴拉举行的第10届南极地球科学国际研讨会（ISAES 2007）上。本文借助于描述岩石学的方法，提出了石英中Ti的经验温度计T（℃）=-5895/（InX_（？）<TiO2>+1.729）-273。这个温度计现在正在伦敦地质学会杂志特刊上印刷。详细分析了超高温麻粒岩的变质过程。在岩相分析中，我们发现石英中的Fe^&lt;3+&gt;随温度的升高而增加.在990-1440℃空气中进行了Fe^&lt;3+&gt;在硅质矿物中溶解度的实验。结果表明，石英中三价铁的含量随压力和温度的升高而增加：InX_<Fe>=（-1092-5.254T +7.75P）IT，其中X_<Fe>、T和P分别为石英中Fe原子数（Fe的阳离子摩尔分数），温度为开尔文，压力为千巴。将该温度计应用于新疆天山超高温变质石英-磁铁矿岩中。在东南极纳皮耶杂岩的Riiser-Larsen地区，变质温度为994-1095℃，压力为5-15 kbar。少

项目成果

いわゆる「頁岩質砂岩」の原産地について

关于所谓“页岩砂岩”的起源

• 发表时间: 2007
• 期刊: 九州考古学 82
• 作者: 能登原 孝道;ほか
• 通讯作者: ほか

Lower crustal processes of Trans Vietnam Orogenic Belt and its northern extension : evidences for Permo-Triassic collision metamorphism in Eastern Asia

越越造山带及其北延的下地壳过程：东亚二叠纪-三叠纪碰撞变质作用的证据

• 发表时间: 2007
• 作者: Osanai;Y.;Nakano;N.;Owada;M.;Tran N. Nam;Binh;P.;Miyamoto;T.;Baba;S.;Kawakami;T.;Toyoshima;T.;Nguyen T. Minh and Tran V. Tri
• 通讯作者: Nguyen T. Minh and Tran V. Tri

Multiple breakdown and chemical equilibrium of silicic clinopyroxene under extreme metamorphic conditions in the Kontum Massif,central Vienam

越南中部昆嵩地块极端变质条件下硅质单斜辉石的多次分解和化学平衡

• 发表时间: 2007
• 期刊: American Mineralogists 92
• 作者: N. Nakano;Y. Osanai and M. Owada
• 通讯作者: Y. Osanai and M. Owada

Timing and Magma Processes of Intrusive Rocks from the Kontum Massif,Central Vietnam.

越南中部昆嵩地块侵入岩的时间和岩浆过程。

• 发表时间: 2007
• 作者: Owada;M.;et. al.
• 通讯作者: et. al.

Solubility of TiO 2 in garnet and orthopyroxene: Ti thermometer for ultrahigh-temperature granulites

• DOI: 10.3133/ofr20071047srp038
• 发表时间: 2007
• 作者: Toshisuke Kawasaki;Y. Motoyoshi