中文摘要：

桐柏山位于我国的中央造山带东部，走向北西-南东，南北跨越鄂豫两省，向西北倾没于南阳盆地之下，向南东过渡到大别山。山体由一套变质杂岩组成，南北两侧为含榴辉岩的高压变质地体，其构造就位过程一直为广大地质学家所关注。我们通过野外地质考察发现，该山体在地貌上呈北陡南缓的格局，表明它在演化的晚期经历过一次向南的掀斜运动。殷店和桐柏韧性剪切带构成山体的南北边界。前者倾向南，呈右行剪切，后者倾向北，呈左行剪切。殷店断裂中的糜棱岩产状很稳定，一直延伸到桐柏山主峰——太白顶（1140m）。其下部为桐柏杂岩体，后者的产状虽然复杂，但其中的拉伸线理的产状却稳定，走向北西一南东，向北西倾伏。按此产状追索，它们也应倾没于南阳盆地之下。通过构造恢复，可以推断在掀斜运动发生之前，殷店和桐柏韧性断裂应连为一体，构成一个向北西倾伏的低角度正断层，本文称之为太白顶拆离断层。基于对桐柏杂岩的运动学和显微构造学研究，可以推断桐柏杂岩原来位于东秦岭之下，是中下地壳的组成部分，由于中生代华北和扬子两板块的碰撞和持续的陆内汇聚作用而造成南东侧向挤出，它们作为异地地体从原地地体一超高压变质岩之下隆升到地表，太白顶拆离构造的功能与藏南拆离系一样，构成桐柏杂岩隆升顶部的滑脱面。40r／39Ar年代学研究结果表明，桐柏山侧向挤出隆升造山事件发生在晚白垩纪早期（102～85Ma）。南阳盆地形成于桐柏山的西侧，是一个东断西超的半地堑盆地，其沉积作用始于早白垩世，大规模沉陷发生在晚白垩世，这与桐柏山的隆升是同时的，反映出沉积和构造隆升是耦合的。

英文摘要：

The Tongbai Shan（mountains） is located in the east part of the central orogenic belt of China,crossing the Hubei and Henan Provinces. The construction process of it has attracted the major attention of geologists worldwide. Through field geological investigation,we found that the northern slope of the Tongbai Shan is steep,while the southern slop is relatively flat, suggesting that the Tongbai Shah may have experienced southward tilting. The Yindian fault constitutes the southern boundary of the Tongbai Shah, present with dextral strike-slip movement. It is composed of mylonite, which can be trace to the highest peak of the Tongbai Sban, namely Taibaiding（1140 m）. Beneath the mylonite is the Tongbai complex,which constitutes the main part of the Tongbai Shan. Although the attitude in the complex is orderless, stretching lineation remains stable, elongated in northwest-southeast directionin. We can infer that prior to the tilting movement occurred, the Yindian fault was formed as a low-angle normal fault with stretching lineation plunging into northwest, we name it as the Taibaiding detachment fault. Kinematics and microstructure studies show that originally the Tongbai complex was located in the lower crust beneath the east Qinling Mountains and was brought to the surface as a result of the lateral extrusion along the Taibaiding detachment fault, due to the Mesozoic collision between the north and south China. 40Ar/39Ar geochronology results show that the tectonic uplift of the Tongbai Shan initiated in Late Cretaceous （102 -85 Ma）. The subsidence of the Nanyang Basin,initiated in Cretaceous time, is directly controlled by the lateral extrusion of Tongbai complex, formed as a half graben, overlying on the metamorphic complex of the Tongbai Shan along the Taibaiding detachment fault and overlap on the pre-Mesozoic rocks with different age of the east Qinling belt.