Correlation of Late Permian basement rocks in the eastern margin of Asian continent on the basis of the CHIME dking

基于CHIME dking的亚洲大陆东缘晚二叠世基底岩对比

• 批准号: 12640442
• 负责人: SUZUKI Kazuhiro
• 金额: $ 2.75万
• 依托单位: Nagoya University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2000
• 资助国家: 日本
• 起止时间: 2000 至 2001
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-12640442/
• 关键词: CHIME dating; Monazite; Korean Peninsula; Metamorphic rocks; Geochronology; Higo metamorphic belt; Denudation history; Gyonggi massif; 変成帯の削剥上昇; CHIME ages; Permian; Korean Peninsula; Japanese Islands; Gyeonggi Massif; Precambrian; Hida bel

Basement rocks in the Japanese Islands and the eastern margin of Asian continent were correlated on the basis of the CHIME dating of accessory monazite and zircon and the XRF analyzes of whole-rock composition. The main results are as follows.(1) Tonalitic clasts in Usuginu conglomerate of the South Kitakami terrane show 258-247 zircon and monazite ages which are are consistent with the Late Permian fossil age. If these ages are taken as representing emplacement ages of the source granitoids, rapid denudation of the source areas must have occurred. Granitoids in the Sikhote-Alin area show CHIME monazite ages of around 250 Ma, and appear to be a likely source ofclasts in the Usuginu conglomerate.(2) Quartzofeldspathic veins in the sillimanite-grade Ryoke paragneiss in the Otowa-Honguusann area, Aichi Prefecture are classified into deformed and ndeformed veins. Deformed veins show boudinage structure, and give CHIME monazite ages of 95-90 Ma. Undeformed veins are discordant with a clear- … More cut boundary, and give 86-77 Ma monazite age. The ages coupled with the deformation pattern of veins suggest that the metamorphic rocks in the area had been uplifted from the ductile deformation condition to the brittle deformation conditions during the period of 90-86 Ma.(3) CHIME dating of granitoids in southeastern China disclosed that the middle to late Jurassic granites are prominent throughout the inland area including Huangshan and Wugongshan, whereas the middle Cretaceous granites are distributed mainly in the coastal region.(4) A granite clast from the Tsukiyozawa conglomerate shows 178+/-3 Ma CHIME monazite ages. This is the first authenticated document to unveil the existence of the Jurassic granitoid from the Jurassic intraformational conglomerate in the Mino terrane, and provides a clearer clue to the Mesozoic source rock for clastic rocks of the terrane.(5) The Sosan granite gneiss shows 1.72 Ga CHIME zircon age. It has long been considered to be a intrusion emplaced into paragneisses in the G^onggi massif. The CHIME dating, however, show monazite and zircon in the paragneiss are much younger that in the Sosan granite gneiss. The paragneisses were folded together with leucogranite veins which give CHIME monazite and zircon ages of c. 250 Ma. This suggests an intense Late Permian metamorphism in Korean Peninsula.(6) Monazite grains in Higo metamorphic rocks are in textural equilibrium with the peak metamorphic mineral assemblage, and are oriented parallel to a strong mineral foliation developed during peak metamorphism. All monazite grains yield CHIME ages of 110-120 Ma. On the basis of the petrographic evidence the monazite ages are interpreted as representing the time of metamorphism and deformation. This conclusion is contrary to studies which suggest that the Higo gneiss formed during the Permian-triassic. Less

日本岛上的地下岩石和亚洲大陆的东边缘是基于辅助独居石和锆石的铃声和全岩体组成的XRF分析的相关性。主要结果如下。（1）南基塔卡米地层的Usuginu企业的音调经典表演258-247锆石和独居石时代与晚期二叠纪化石时代一致。如果以这些年龄为代表源花岗岩的就业年龄，则必须发生快速的源区域。锡科特 - 阿林地区的花纹素显示出大约250 mA的圆锥形单元，并且似乎是USUGINU企业集团中的分类者的来源。（2）在Otowa-Honguusann地区，Silkimanite-Grade Ryoke Ryoke ryoke ryoke ryoke ryoke ryoke ryoke ryoke ryoke ryoke ryoke ryoke paragrapheiss and and and and and and and and veled velorded。变形的静脉显示出横向结构，并给出95-90 MA的钟形式。未变形的静脉与明确的……更切开的边界不一致，并给出了86-77 MA单纳粹的年龄。年龄与静脉的变形模式相结合，表明该地区的变质岩石已从延性变形条件提升到90-86 MA期间的变形状况，（3）中国东南部的花岗岩的钟声约会，中国的花岗岩的日期透露，该地区均涵盖了侏罗纪晚期，包括宜人的植物群，包括众所周知的整个杂志，众所周知，众所周知，任何地方均在内。中白垩统的花岗岩主要分布在沿海地区。（4）来自Tsukiyozawa砾岩的花岗岩碎屑显示178 +/- 3 mA钟形钟形ronazite时代。这是第一份经过验证的文件，可以揭示侏罗纪花岗岩的存在，从侏罗纪的信息企业集团中，并为中生代源岩石提供了森林经典岩石的清晰线索。（5）Sosan Granite Granite片麻岩显示1.72 Ga chime chime chime simir sircon Age。长期以来，它被认为是在g^goggi massif中插入段落中的入侵。然而，在段落中显示了sosan花岗岩片麻岩中的单一和锆石的日期比较年轻得多。将这些段落与白细胞静脉折叠在一起，这些静脉给出了Chime Ronazite和C的锆石年龄。 250 MA。这表明在韩国半岛发生了强烈的二叠纪变质。（6）地基变质岩石中的独居石晶粒处于质地平衡，峰值变质矿物质组合峰，并且与在峰值变质期间开发的强矿物叶片相似。所有独居石的晶粒均产生110-120 MA的钟声。根据岩石学的证据，单氮岩的年龄被解释为代表变质和变形的时间。该结论与研究对比，这表明在二叠纪三叠纪期间形成的希戈oo片麻岩。较少的

项目成果

Dunkley, DJ. And Suzuki, K.: "Petrographically constrained CHIME dating of monazite from the Higo metamorphic terrane, Kyushu, Japan : preliminary results from metapelitic gneiss."J. Earth Planet. Sci., Nagoya Univ. 48.

邓克利，DJ。

Kusiak, M., Suzuki, K., Paszkowski, M.: "Preliminary report of CHIME dating on detritial monazite grains from the Namurian Poruba bed and the Stephanian Kwaczaka arkose in the Upper Silesian Coal Basin, Poland"J. Earth Planet. Sci., Nagoya Univ.. 48(In pr

Kusiak, M.、Suzuki, K.、Paszkowski, M.：“对来自波兰上西里西亚煤盆地那穆里安波鲁巴床和斯蒂芬尼夸扎卡长石的碎屑独居石颗粒进行 CHIME 测年的初步报告”J.

Kusiak, M., Suzuki, K., Paszkowski, M.: "Preliminary report of CHIME dating on detritial monazite grains from the Namurian Poruba bed and the Stephanian Kwaczaka arkose in the Upper Silesian Coal Basin, Poland"J.Earth Planet.Sci., Nagoya Univ.. 48(in pres

Kusiak, M.、Suzuki, K.、Paszkowski, M.：“对来自波兰上西里西亚煤盆地那穆里安 Poruba 床和 Stephanian Kwaczaka 长石的碎屑独居石颗粒进行 CHIME 测年的初步报告”J.Earth Planet.Sci

Asami, M, Suzuki, K. and Grew, E-S.: "Chemical Th-Utotal Pb dating by electron microprobe analysis of monazite, xenotime and zircon from the Archean Napier Complex, East Antarctica : evidence for ultra-high-temperature metamorphism at 2400 Ma."Precambrian

Asami, M, Suzuki, K. 和 Grew, E-S.：“通过电子探针分析对东南极太古宙纳皮尔杂岩中的独居石、磷钇矿和锆石进行化学 Th-Utotal Pb 测年：2400 年超高温变质作用的证据

田中姿郎,鈴木和博,足立守: "美濃帯北東部,月夜沢峠地域のジュラ紀礫岩から産出した約178MaのCHIME年代を示す花崗岩質岩礫についての予察的報告"名古屋大学博物館報告書. 16(印刷中). (2001)

Sugaro Tanaka、Kazuhiro Suzuki、Mamoru Adachi：“美浓带东北部月代泽山口地区侏罗纪砾岩中产生的 CHIME 年龄约为 178 Ma 的花岗岩砾石的初步报告”（2001 年）。 ）