新疆东准噶尔花岗岩类岩石高温高压弹性波速度及其对地壳结构的约束

	新疆东准噶尔花岗岩类岩石高温高压弹性波速度及其对地壳结构的约束
其他题名	The elastic wave velocities of the granitoids from Eastern Junggar of Xinjiang at high temperature and high pressure and their geological constraints on the crustal structure
	臧春娟; 王明梁; 刘永刚; 唐红峰
	2014
发表期刊	地球物理学报
卷号	57 期号:7 页码:2099-2112
其他摘要	The compressional (V-P) and shear wave velocities (V-S) of typical granitoids (alkali-feldspar granite, alkaline granite, granodiorite, monzogranite and quartz diorite) from Kalamaili granite belt and Yemaquan body in Eastern Junggar, Xinjiang were experimentally measured at pressures up to 1. 0 GPa ( room temperature) and temperatures up to 700 degrees C (1. 0 GPa) by ultrasonic reflection-transmission method. The results show that both V-P and V-S of the granitoids present a linear velocity increase with the pressure at room temperature from 0. 4 1. 0 GPa, which is interpreted in terms of closure of the microcracks in rocks under this pressure range. The V-P and V-S of the granitoids are 5. 79 similar to 6. 84 km . s(-1) and 3. 26 similar to 3. 85 km . s(-1) respectively at room temperature and 1. 0 GPa. On the basis of the linear relationship between pressure with V-P and V-S, we derived the pressure derivatives of V-P, and V-S as 0. 1568 similar to 0. 4078 km/(s . GPa) and 0. 0722 similar to 0. 3271 km/(s . GPa) respectively, and the reference velocities V-P0 and V-S0 are 5. 62 similar to 6.47 km . s(-1) and 3. 15 similar to 3. 75 km . s(-1) respectively. At 1. 0 GPa, V-P and V-S of the granitoids show a linear decrease with temperature from room temperature to 700 degrees C, and temperature derivatives of velocities are (-3. 41 similar to -4. 96) X 10(-4) km/(s . degrees C) and (-0. 88 similar to-3. 22) X 10-4 km/(s . degrees C), respectively. Taking advantage of derivatives of velocities and reference velocities of the granitoids obtained from our experiments, and combining regional geothermal resources of East Junggar area, V-P and V-S-depth profiles were calculated. From the comparison of velocity-depth profiles with geophysical exploring results, we infer that the V-P and V-S of the alkali-feldspar granite, alkaline granite, monzogranite and part of granodiorite in Eastern Junggar of Xinjiang are coherent well with the velocity of the upper crust, and the average Poisson's ratio of several rocks are also consistent with the Poisson's ratio of the upper crust. Therefore, we suggest that these kinds of rocks are important parts of the upper crust in this region. In addition, the V-P and V-S of the quartz diorite are both in accord with the middle crust, suggesting that it may be one kind of rocks in the middle crust of this region.
关键词	弹性波速度高温高压实验花岗岩类地壳结构新疆东准噶尔
学科领域	地球深部物质与流体作用地球化学
收录类别	CSCD
语种	中文
CSCD记录号	CSCD:5204943
引用统计	被引频次：3[CSCD] [CSCD记录]
文献类型	期刊论文
条目标识符	http://ir.gyig.ac.cn/handle/352002/5250
专题	地球内部物质高温高压实验室_地球内部物质高温高压实验室_期刊论文
推荐引用方式 GB/T 7714	臧春娟,王明梁,刘永刚,等. 新疆东准噶尔花岗岩类岩石高温高压弹性波速度及其对地壳结构的约束[J]. 地球物理学报,2014,57(7):2099-2112.
APA	臧春娟,王明梁,刘永刚,&唐红峰.(2014).新疆东准噶尔花岗岩类岩石高温高压弹性波速度及其对地壳结构的约束.地球物理学报,57(7),2099-2112.
MLA	臧春娟,et al."新疆东准噶尔花岗岩类岩石高温高压弹性波速度及其对地壳结构的约束".地球物理学报 57.7(2014):2099-2112.

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