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片钠铝石

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As cement, authigenic mineral or vein, dawsonite is found not only in marine dolomite and oil shale, but also in terrigenous fragmentary rock and coal measures.

片钠铝石作为胶结物、自生矿物或脉体,不仅分布在海相白云岩、油页岩中,而且还广泛分布在陆源碎屑岩及煤系地层中。

The sandstone with abundant dawsonite can be used to study the genetic relationship between the authigenic minerals caused by injected CO2 gas and original CO2 in Gudian carbonate dioxide gas field of Songliao Basin.

松辽盆地孤店二氧化碳气田储集砂岩中含有大量片钠铝石,根据其特征可以查明注入CO2气形成的自生矿物与CO2成因之间的联系。

Dawsonite of Mesozoic strata in Northeast China and adjacent area distribute in Lower Cretaceous strata from Hailaer basin,Tamtsag basin, Erlian basin, Kailu basin and Fuxin basin, and Upper part of Lower Cretaceous and Lower part of Upper Cretaceous from southern Songliao basin.

东北及邻区中生代地层中的片钠铝石分布于海拉尔盆地、塔木察格盆地、二连盆地、开鲁盆地和阜新盆地的早白垩世地层及松辽盆地南部的早白垩世晚期-晚白垩世早期地层中。

Dawsonite in the shapes of foliated columnar, cluster, radial, chrysanthemum or random hair mainly filled in the intergranular pores as cements and a few replaced grains such as feldspar and quartz.

其中,片钠铝石呈板柱状、束状、放射状、菊花状、杂乱毛发状集合体,主要作为胶结物产于碎屑岩碎屑颗粒间的孔隙中,少量交代长石、石英等碎屑。

The coesite-diamond-bearing eclogite distributed in the northern part of the UHPM belt suffered three stages of metamorphism. The first stage is the Ep amphibolite facies metamorphism, which is represented by the paragenesis of phe+Qtz+Cro/Bar Bar+Ep+Ab occurred as inclusions in Grt and Omp; The second stage is the peak metamorphism of eclogite facies with mineral assembledge of Grt+Omp+Coe±Dia±Ky±Zo±Phe+Rt. The P -T condition is 800±50℃,≥28Kb; The third stage is the amphibolite facies retrograded metamorphism from the peak one, which can be divided intothe early amphibolite facies stage with the mineral assembledge of Amp+ Pl+Di+Qtz±Ep+Ilm/Ttn and the late greenschist facies one with the mineral assembledge of Ep+Chl+Bi+Tr+Ab.

分布于超高压变质带北侧的柯石英榴辉岩经历了3个阶段的变质作用:(1)早期绿帘—角闪岩相阶段,以出现在石榴石和绿辉石中的包体矿物多硅白云母、石英、冰蓝闪石或青铝闪石、钠长石等为代表;(2)峰期柯石英榴辉岩相阶段,其矿物组合为Grt+Omp+Ky+Phe±Zo+Coe±Dia+Rt,其变质温度压力为800±50℃,≥28Kb;(3)退化变质作用阶段,早期为角闪岩相,以Amp+Pl+Di±Ep+Qtz+Tit等退变矿物组合为代表;晚期为绿片岩相,以绿帘石、绿泥石、黑云母、透闪石及钠长石等矿物为代表。

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