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rb sr isotopic age
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  “rb sr isotopic age”译为未确定词的双语例句
     Based on the confirmation of the occurrences of Funiushan composite rockbodies, the author collected some fresh samples of granodiorite porphyry rockbodies for the dating of Rb Sr isotopic age. As a result, a well fitted Rb Sr rock mineral isotime line, 111±1 Ma isotopic age of the rockbodies and the initial strontium isotopic ratio(Sr 87 /Sr 86 ) 0 705 8±0 000 1 were obtained.
     从伏牛山岩体采集了新鲜的花岗闪长斑岩作铷锶同位素年龄测定,得到了拟合度很好的RbSr岩体矿物等时线,获得111Ma±1Ma年龄和锶的初始比值(Sr87/Sr86)i为07058±00001。
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  相似匹配句对
     Rb-Sr ISOCHRON DATING OF SHALES
     页岩Rb-Sr等时线年龄的测定
短句来源
     Rb-Sr DATING FOR MINERALS AND ROCKS
     铷-锶法测定岩石、矿物的同位素地质年龄
短句来源
     Its Rb-Sr isotopic age is 84 my.
     其铷-锶同位素年龄为84百万年。
短句来源
     Its Rb-Sr isotope age is 606. 3 Ma.
     基底的岩性为结晶片岩、大理岩及变质杂砂岩夹层,同位素Rb-Sr年龄为606.3Ma;
短句来源
     Rb-Sr Ages of Rocks in Lianhuashan Mining Region
     莲花山钨矿区Rb—Sr同位素地质年龄
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The Taiping-Huangshan polygcnetic composite batholith is exposed to a transitional belt between Jangnan geoanticline and Lower Yangtze faultdepression belt in southern Anhui, and it is composed of Taiping granodiorite and Huangshan granite bodies, different both in age and genesis, and also apparently different in the petrological characteristics described in present paper. The Taiping granodiorite of the syntexis type, with the RbSr isotopic age of 223.1 m.y. and the initial...

The Taiping-Huangshan polygcnetic composite batholith is exposed to a transitional belt between Jangnan geoanticline and Lower Yangtze faultdepression belt in southern Anhui, and it is composed of Taiping granodiorite and Huangshan granite bodies, different both in age and genesis, and also apparently different in the petrological characteristics described in present paper. The Taiping granodiorite of the syntexis type, with the RbSr isotopic age of 223.1 m.y. and the initial (87)~Sr/(86)~Sr ratio of 0.707, is a Indosinian intrusion. Its K-feldspar is orthoclase with small triclinic ordering degree(δT_x<0.3), the chemical composition of biotite, with higher Mg/(Mg+Fe~(+3)+F~(+2)+Mn)ratio(0.42—0.50), is rich in Mg and poor in Fe, and the accessory mineral association is magnetite-sphene-apatite association. It is suggested that the Taiping granodiorite may be originated from lower crust. The Huangshan granite of transformation type, with the RbSr age of 130.6 m.y. and the initical (87)~Sr/(86)~Sr ratio of 0.714, was intruded during the late Yanshannian period, its K-feldspar is middle microcline(0.3<δT_k<0.8), while the biotite is generally poor in Mg and rich in Fe, with lower Mg/(Mg+Fe~(+3)+Fe~(+2)+Mn)values(0.01—0.16), and its accessory minerals are mainly consisted of fluorite, topae, zircon and monazite. It is suggested that the Huangshan granite would be derived from the upper crust. The Taiping-Huangshan polygenetic composite batholith occurs in a transitional belt between a uplifted M-surface and a depressed one, where the Lingguo-Taiping deep fault has been developed, resulting from isostatic adjustment between different tectonic units. The partial melting of continental crust on different levels and the conti-nual intrusion of magmas is favourable to be developed.

本文通过安徽黄山地区花岗岩类岩石学特征的研究,提出太平—黄山花岗岩基是一个由印支期太平花岗闪长岩和燕山期黄山花岗岩组成的多期、多成因复合岩基,两者在岩石学特征方面存在极为明显的差别。通过综合对比,确认太平花岗闪长岩属于同熔型花岗宕;黄山花岗岩属于改造型花岗岩。根据地球物理资料,作者认为这种多期、多成因复合花岗岩基出现于莫霍面隆起和莫霍面拗陷的过渡地区,与深大断裂有空间的联系。

The Taiping-Huangshan polygenetic composite batholith is exposed to a transitional belt between Jangnan geoanticline and Lower Yangtze faultdepression belt in southern Anhui, and it is composed of Taiping granodioritc and Huangshan granite bodies, different both in age and genesis, and also apparently different in the petrological characteristics described in present paper. The Taiping granodiorite of the syntexis type, with the Rb-Sr isotopic age of 223.1 m. y. and the initial...

The Taiping-Huangshan polygenetic composite batholith is exposed to a transitional belt between Jangnan geoanticline and Lower Yangtze faultdepression belt in southern Anhui, and it is composed of Taiping granodioritc and Huangshan granite bodies, different both in age and genesis, and also apparently different in the petrological characteristics described in present paper. The Taiping granodiorite of the syntexis type, with the Rb-Sr isotopic age of 223.1 m. y. and the initial ~(87)Sr/~(86)Sr ratio of 0.707, is a Indosinian intrusion. Its K-feldspar is orthoclase with small triclinic ordering degree (δT_x<0.3), the chemical composition of biotite, with higher Mg/(Mg+Fe~(+3)+F~(+2)+Mn) ratio (0.42—0.50), is rich in Mg and poor in Fe, and the accessory mineral association is magnetite-sphene-apatite association. It is suggested that the Taiping granodiorite may be originated from lower crust. The Huangshan granite of transformation type, with the Rb-Sr age of 130.6 m. y. and the initical ~(87)Sr/~(86)Sr ratio of 0.714, was intruded during the late Yanshannian period, its K-feldspar is middle microcline (0.3<δT_x <0.8), while the biotite is generally poor in Mg and rich in Fe, with lower Mg/(Mg+Fe~(+3)+Fe~(+2)+Mn) values (0.01—0.16), and its accessory minerals are mainly consisted of fluorite, topae, zircon and monazite. It is suggested that the Huangshan granite would be derived from the upper crust. The Taiping-Huangshan polygenetic composite batholith occurs in a transitional belt between a uplifted M-surface and a depressed one, where the Lingguo-Taiping deep fault has been developed, resulting from isostatic adjustment between different tectonic units. The partial melting of continental crust on different levels and the continual intrusion of magmas is favourable to be developed.

本文通过安徽黄山地区花岗岩类岩石学特征的研究,提出太平—黄山花岗岩基是一个由印支期太平花岗闪长岩和燕山期黄山花岗岩组成的多期、多成因复合岩基,两者在岩石学特征方面存在极为明显的差别。通过综合对比,确认太平花岗闪长岩属于同熔型花岗岩,黄山花岗岩属于改造型花岗岩。根据地球物理资料,作者认为这种多期、多成因复合花岗岩基出现于莫霍面隆起和莫霍面拗陷的过渡地区,与深大断裂有空间的联系。

Kuiqi Granitic Complex is composed mainly of alkali granite and locally of earlier biotite granite. The batholith with an RbSr isotopic age of 107.65m.y. emplaced at extensional stage of Nanao-Changle Fault after compressing. In the alkali granite, perthite is the main feldspar minerals and, acmite and arfvedsonite appears as the dark mineral. Miarolitic strueture and granophyric texture are well developed. The granite is high in SiO_2, low in Al_2O_3, CaO and MgO contents and relatively...

Kuiqi Granitic Complex is composed mainly of alkali granite and locally of earlier biotite granite. The batholith with an RbSr isotopic age of 107.65m.y. emplaced at extensional stage of Nanao-Changle Fault after compressing. In the alkali granite, perthite is the main feldspar minerals and, acmite and arfvedsonite appears as the dark mineral. Miarolitic strueture and granophyric texture are well developed. The granite is high in SiO_2, low in Al_2O_3, CaO and MgO contents and relatively rich in alkaline. Petrological and petrochemical studieds show that the batholith has cogenetic relationship with the coexisting granites and volcanic rocks and, is a late stage product of a syntexis magmatic evolution. As it is a pluton of anorogenic, anhydrous and alkaline-rich characteristics, Kuiqi granite is similar to A-type granite. Consequently it should be considered as a syntexis (A) type in petrogenesis.

魁歧花岗岩是我国东南沿海晶洞钾长花岗岩的代表性岩体。该岩体Rb—Sr等时线年龄为107m.y.,它是在南澳—长乐断裂挤压作用之后的拉张阶段侵位,以碱性花岗岩为主,伴有早期黑云母花岗岩的复式岩体。碱性花岗岩中长石为条纹长石,出现霓石和亚铁钠闪石。晶洞构造、花斑结构普遍发育。化学成分以富硅、碱,低铝、钙、镁为特征。岩石化学资料表明,魁歧花岗岩与共生的火山岩和其他花岗岩之间存在明显的同源关系,是同熔型岩浆分异演化晚期的产物。但该花岗岩以非造山、相对无水、富碱等特征类似于A型花岗岩,因此笔者建议将该类花岗岩列为同熔(A)型。

 
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