地下岩石构造力复合重力的压力状态分析
发布时间：2018-08-26 12:58
【摘要】：针对大别一带超高压变质作用的形成深度存在两种观点:其一是形成深度可用静流体公式h=p/(ρg)算出,并得出变质作用形成于90km或更深处;其二是超高压是重力、构造力和其他力合成的,并不只是重力的作用,从而该变质作用可以在地壳内形成。地下的岩石处于固态,而静止流体公式不适用于固体。事实上,围压不仅来自重力,而且也来自构造力和其他力,所以合理的求深度算法应该是从总压力中减去构造力获得纯重力才可用来计算深度。还简要解释了诸如剪应力、差应力、构造力等概念。
[Abstract]:There are two viewpoints on the formation depth of UHP metamorphism in Dabie area: one is that the formation depth can be calculated by h=p/ (蟻 g), and the metamorphism is formed in 90km or deeper, the other is that the UHP is gravity. Tectonic forces and other forces combine not just gravity, so the metamorphism can take place in the crust. Underground rocks are solid, but the stationary fluid formula does not apply to solids. In fact, the confining pressure comes not only from gravity, but also from tectonic and other forces, so the reasonable depth calculation algorithm should be to subtract the tectonic force from the total pressure to obtain the pure gravity to calculate the depth. Concepts such as shear stress, differential stress and tectonic force are also briefly explained.
【作者单位】： 北京大学地球与空间科学学院;中国地质科学院地质力学研究所;中国地质大学(北京)地球科学与资源学院;
【基金】：国土资源部科技发展计划项目“地壳深部压力与超高压岩石形成研究”(2002201) 国家计委科技找矿项目(JG947110) 国家科委基础司特别支持项目(国高科[1994]83)
【分类号】：P588.3
本文编号：2204937
[Abstract]:There are two viewpoints on the formation depth of UHP metamorphism in Dabie area: one is that the formation depth can be calculated by h=p/ (蟻 g), and the metamorphism is formed in 90km or deeper, the other is that the UHP is gravity. Tectonic forces and other forces combine not just gravity, so the metamorphism can take place in the crust. Underground rocks are solid, but the stationary fluid formula does not apply to solids. In fact, the confining pressure comes not only from gravity, but also from tectonic and other forces, so the reasonable depth calculation algorithm should be to subtract the tectonic force from the total pressure to obtain the pure gravity to calculate the depth. Concepts such as shear stress, differential stress and tectonic force are also briefly explained.
【作者单位】： 北京大学地球与空间科学学院;中国地质科学院地质力学研究所;中国地质大学(北京)地球科学与资源学院;
【基金】：国土资源部科技发展计划项目“地壳深部压力与超高压岩石形成研究”(2002201) 国家计委科技找矿项目(JG947110) 国家科委基础司特别支持项目(国高科[1994]83)
【分类号】：P588.3
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，本文编号：2204937
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