Sr and Nd isotopic compositions and Rb, Sr, Sm and Nd concentrations of standard samples
Sr and Nd isotopic compositions and Rb, Sr, Sm and Nd concentrations of standard samples
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标准样品的 Sr 和 Nd 同位素组成以及 Rb、Sr、Sm 和 Nd 浓度
DOI：
10.1144/gsl.sp.1989.043.01.45
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发表时间：
1987
期刊：
影响因子：
--
通讯作者：
H. Kagami
中科院分区：
文献类型：
--
作者：
H. Kagami
Hidaka变质带是第三纪早期至中期发育的倾斜岛弧组合。角闪岩相和麻粒岩相变质岩的P-T估计表明，在地壳早期演化阶段，该区具有较高的地热梯度（40℃km-X），可能是由大量辉长岩侵入所致。地壳随后从北向南发生亚水平位移，导致下地壳层从最低地壳向上地壳层分离，并形成双变质层。随后是右向逆压，地壳层隆起并急剧向东倾斜。
The Hidaka metamorphic belt is a tilted islandarc assembly of crustal layers developed during early to middle Tertiary age. The P-T estimates of metamorphic rocks in the amphibolite and granulite facies reveal a relatively high geothermal gradient (40 C km-X), possibly caused by the large amount of gabbroic intrusions, at an early evolutional stage of the crust. The crust was subsequently displaced subhorizontally from north to south, giving rise to detachment of lower to upper crustal layers from the lowest crust, and to the formation of a duplex of crustal metamorphic layers. This was followed by dextral transpression in which the crustal layers were uplifted and tilted steeply eastward.