According to the metamorphic fluid involved, metamorphic zircon can be divided into five subtypes: metamorphic recrystallization via solid-state transformation, replacement alteration or dissolution reprecipitation, and metamorphic growth corresponds to chemical precipitation from aqueous fluid or hydrous melt.

根據(jù)參與鋯石改造的變質(zhì)流體性質(zhì)黄又色又爽很刺激的网站，進一步可將變質(zhì)鋯石區(qū)分為五種不同類型，即固態(tài)重結(jié)晶鋯石精品一级在线免费、交代重結(jié)晶鋯石国产美女呻吟免费网站999、溶解重結(jié)晶鋯石，以及富水流體和含水熔體中的生長鋯石日韩三级片av。

Based on a systematic petrographic and geochemical study and a zircon U-Pb SHRIMP age analysis, the authors revealed that the age of ore-hosting volcanics (XC01-1 rhyolitic tuff) is 180.4±3.5 Ma.

對西藏岡底斯帶南部雄村銅金礦床的容礦火山巖和外圍巖石進行了巖石學(xué)永久免费啪啪网站免费看美国、地球化學(xué)、鋯石年代學(xué)研究一级AA免费毛片高潮软件。

The zircon SHRIMP U-Pb chronological results show the ages of 584±7 Ma for the Lunckeryggen granite,619±7 Ma for the Defuk granite,534±13 Ma for the Mefjell syenitic rocks in the Sr Rondane Mountains,East Antarctica,representing the formation ages of the different Pan-African grantoid bodies.

本文通過對東南極索龍達訥山泛非期花崗質(zhì)巖石采用高精度鋯石U-Pb SHRIMP定年com碰，獲得Lunckeryggen花崗巖中鋯石的年齡為584±7 Ma、Defuk花崗巖中鋯石的年齡為619±7 Ma欧美欧美欧美性爱网、Mefjell正長巖中鋯石的年齡為534±13 Ma一级日本特黄牲交大片在线。

In contrast to zircon, titanite is quite reactive in most rocks contain Ca and Ti at different conditions. Therefore, its UPb ages are likely to yield the age of metamorphic crystallization rather than resetting by simple diffusion, such that metamorphic titanite may preserve complicated UPb system that contains information of the whole metamorphic history of the rock, which can be revealed by in situ UPb dating, e.g., SHRIMP, LAMCICPMS and LAICPMS.

由于榍石的組成元素均為巖石中的主要元素，很容易與其它礦物色色五月天导航、熔體及流體發(fā)生反應(yīng)www.sw23s.com，所以榍石的U-Pb年齡記錄的更可能是結(jié)晶年齡，而不是簡單的擴散重置年齡国产精品久久永二区二区；也因為它容易反應(yīng)一区二区综合，變質(zhì)榍石復(fù)雜的UPb體系可能記錄了巖石的整個變質(zhì)歷史信息。

From the point of the ΣREE,δEu, geochemical parameters and standard REE distribution patterns, lead-zinc mineralization altered rocks in the Shengmikeng deposit have close genetic relationship with the potassic trachyte porphyry with SHRIMP zircon age of 138.3±1.4 Ma.

從∑REE總量值黄色性交网站性、δEu值jizzjzz中国、地球化學(xué)參數(shù)及標(biāo)準(zhǔn)稀土元素配分模式圖上看，生米坑鉛鋅礦化蝕變巖與鉀質(zhì)粗面斑巖具有密切的成因聯(lián)系香蕉视频95。

Some spore-pollen assemblages of late Trias and the youngest zircon of 225Ma were also obtained in this type.Deriveration of the ore is from the upper crust according to the features of trace elements,zircorn U-Pb age and initial value of ~(87)Sr/~(86)Sr.It has not any charateristics of the mantle.

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Through the age analysis on apatite and zircon fission track, there have five stages of tectonic movements, respectively occurred in late Trias, from mid-late period in early Cretaceous to late Cretaceous, Eocene, Oligocene and Miocene.

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SHRIMP zircon dating suggests that Yajiangqiao trondhjemite was emplaced in 778 ± 11 Ma.

雅江橋奧長花崗巖的SHRIMP鋯石U-Pb年齡測定結(jié)果為778±11 Ma 黄色网站毛篇。

For developing a method to reduce the emanation coefficient of Rn in materials, emanation coefficient of Rn in geological uranous materials such as zircon, uranium-bearing ore, etc is measured. Heating is used to study the effect of heating temperature on emanation coefficient of Rn.

通過了解鋯英砂8x国产精品V片在线、鈾礦粉、石英砂鈾礦粉混合物等含鈾地質(zhì)材料中222 Rn的析出情況秋霞理论理论视频免费看，探索了降低這些材料中氡射氣析出率的方法精品剧情日韩欧美在线观看网站免费，并應(yīng)用灼燒法研究了灼燒溫度對上述材料中氡射氣析出率的影響。

Based on the discrimination of the previous data, thirteen granites plutons are selected to be dated by high precision single grain zircon U-Pb method and one pluton is selected to be dated by Rb-Sr and Sm-Nd internal rock-mineral isochron.

本文在充分了解和掌握前人資料和研究成果的基礎(chǔ)上美国一级草草，挑選了13個花崗巖體進行了詳細(xì)的單顆粒鋯石U-Pb定年91人妻中文字幕无码专区，一個巖體進行了全巖—礦物Rb-Sr和全巖—礦物Sm-Nd內(nèi)部等時線定年。