| 温度与差应力对岩石熔融程度的等效关系——以角闪变粒岩为例 |
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| 引用本文： | 沙茜,马瑞.温度与差应力对岩石熔融程度的等效关系——以角闪变粒岩为例[J].吉林大学学报(地球科学版),2011,41(1):106-110. |
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| 作者姓名： | 沙茜 马瑞 |
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| 作者单位： | 吉林大学 地球科学学院,长春 130061 |
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| 基金项目： | 国家自然科学基金，高等学校博士学科点专项科研基金 |
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| 摘 要： | 为了探讨差应力和温度与岩石熔融程度的关系，利用角闪变粒岩进行高温高压条件下的岩石变形实验。包括差应力条件下的动态实验,围压100 MPa,温度700℃,施加相当于差应力为0~25 MPa,且以每5 MPa为间隔进行天然块状岩石样品的动态熔融；在相同的围压条件下,温度由700 ℃到900 ℃每50 ℃为间隔,进行无差应力条件下天然块状岩石的静态熔融实验,并进行对比研究。结果表明,在相同温度条件下,岩石的熔融程度随着差应力的增加明显增高。通过对斜率的对比分析表明:以700 ℃为基准,差应力每增加5 MPa,其带来的影响与温度升高40 ℃的效果相当，也说明中性岩石的熔融对差应力的敏感程度比酸性岩要高。
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| 关 键 词： | 差应力 熔融程度 温度 变质岩 |
| 收稿时间： | 2010-04-01 |
Equivalent Relationship Between Temperature and Differential Stress to the Melting Degree of Rocks: A Case Study of Hornblende Granulite |
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| SHA Qian,MA Rui.Equivalent Relationship Between Temperature and Differential Stress to the Melting Degree of Rocks: A Case Study of Hornblende Granulite[J].Journal of Jilin Unviersity:Earth Science Edition,2011,41(1):106-110. |
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| Authors: | SHA Qian MA Rui |
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| Institution: | College of Earth Sciences, Jilin University, Changchun 130061, China |
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| Abstract: | To study the relationships of differential stresses and temperature to the melting degree of rocks, we use hornblende granulite to do some high-T and high-p experiments. Firstly, we carried out the dynamic melting experiment by imposing differential stresses from 0 to 25 MPa with step at 5 MPa on natural bulk rock samples under confining p and T at 100 MPa and 700 ℃, respectively. Then, we did the static experiment under the same confining pressure but without differential stresses by increasing the T from 700 to 900 ℃ with the step at 50 ℃. Our experimental results indicate that the melting degree of rocks increases with the increase of differential stresses. Through comparing the slopes of the experiments, we found that if taking 700 ℃ as the starting point, the increase of 5 MPa differential stress is equal to the effect of increasing 40 ℃, suggesting that the intermediate rocks are more sensitive to differential stress then felsic rocks. |
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| Keywords: | differential stress degree of melting temperature metamorphic rocks |
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