关于构造变动的“双力源＂假设

地下流体及流体力普遍存在且对构造变动产生影响。分析了地壳构造变动产生的环境、构造应力与流体力的异同性以及地下流体及流体力对多种形式的构造变动（包括地震）的影响。提出了“双力源”构造变动假设，即构造变动幂仅是构造应力作用的结果，而且是构造应力与地下流体力（包括降水等产生的力）共同作用的结果；二者共同作用因方式不同（如大小、方向等）而产生不同的构造变动；在构造变动孕育与产生过程中，构造应力的作用是第一位的，地下流体力则是调制性的，只有那些能与构造应力增强过程产生力学耦合的地下流体力，才能调制与诱发出构造变动异常并促进构造变动。

On Hypothesis of "Double Force Source" for Tectonism

The subsurface fluid and fluid force produced by subsurface fluid universally exist and have influence on tectonism. In this paper, the environment of tectonism occurrence, the similarities and differences of the subsurface fluid force and tectonic stress, and the influence of the subsurface fluid and fluid force on multi-forms of tectonism （including earthquake） are analyzed first. Then, a hypothesis of ＂double force source＂ for tectonism is put forward, its main points are： the tectonism is not only the result from the action of tectonic stress, but also the result from the action of ＂double force source＂, namely, the tectonic stress and subsurface fluid force （including force produced by precipitation, etc. ） which commonly act and produce different tectonism with different act patterns （such as, the different magnitudes and directions of force, etc. ）. In the process of the tectonism development, the tectonic stress is primary and the subsurface fluid force is modulated, and only the subsurface fluid force mechanically coupling with the tectonic stress of the tectonism in its enhancement process may modulate and induce the tectonism abnormality and promote the tectonism.