| 摘要: |
| 首次在工布江达县巴母果蒙拉组中发现遗迹化石及古孢粉,将该区无化石依据的“旁多群”解体;在朗县混杂岩的灰岩块体中发现重结晶的珊瑚、腕足类残片及牙形刺;将冈底斯岩浆弧划分为南部雅鲁藏布江复式岩基带和北部冈底斯主脊复式岩基带;在米林巴嘎一带南迦巴瓦岩群中发现石榴透辉岩、含云透辉榴闪岩扁豆状残留包体;首次在念青唐古拉岩群八拉岩组中发现一套高角闪岩相—麻粒岩相的变质岩系。 |
| 关键词: 1:25万 地质调查 林芝幅 成果与进展 西藏 |
| DOI： |
| 附件 |
| 投稿时间：2004-12-10 |
| 基金项目: |
|
| 1:250 000 Nyingchi Sheet in Xizang |
| No.3 Party of Geology and Mineral Resources, Yunnan Institute of Geological Survey |
| (No.3 Party of Geology and Mineral Resources, Yunnan Institute of Geological Survey, Dali 671000, Yunnan, China) |
| Abstract: |
| The trace fossils and paleosporomorphs are found for the first time in the Bamuguomengla Formation in Gongbo'gyamda, Xizang. The unfossiliferous "Pangduo Group" is redivided. The recrystallized corals, brachiopods and conodonts are identified from the limestone within the Nangxian mélanges. The Gangdise magmatic arc is divided into the Yarlung Zangbo composite batholith zone in the south and Gangdise main ridge composite batholith zone in the north. The residual lenticular inclusions of garnet diopsidite and biotite-bearing diopsidite-garnet-amphibole rocks are observed in the Namjagbarwa Group Complex in the Mainling-Baga zone. A succession of metamorphic rock series composed of the high amphibolite facies-granulite facies is recognized for the first time in the Bala Formation Complex of the Nyainqentanglha Group Complex. |
| Key words: 1:250 000 geological survey Nyingchi Sheet development Xizang |
