Abstract A composite cross section from the Florianopolis Batholith towards the Tijucas Fold Belt in the northern Dom Feliciano Belt (southern Brazil) is divided in three structural domains: the Major Gercino Shear Zone, the suprastructural Brusque Complex and the infrastructural Camboriu Complex. A kinematic correlation among the structural domains is based on structural and petrological data integrated with geochronology. An oblique collisional event at 650-645 Ma affected all structural domains and is best recorded in the Porto Belo Complex, which shows migmatization (700 °C/4.3 kbar) and top-to-the-NNW+dextral shear along the Major Gercino Shear Zone. Subsequent strain partitioning led to progressive tangential movement recorded in the Quatro Ilhas Granitoids (625-615 Ma) followed by later granitic intrusions (after 615 Ma) controlled by dextral strike-slip. Meanwhile, the contractional component was absorbed by the Tijucas Fold Belt infrastructure, causing exhumation of the Camboriu Complex migmatites (from 5 to 3.4 kbar) and unroofing of the suprastructural Brusque Complex (around 635 Ma). Tectonic juxtaposition occurred along a dextral+normal detatchment zone between the complexes. As a consequence, heating of the Brusque Complex locally reached amphibolite-facies conditions and suprastructure thrusting inverted to extension, which is recorded in discrete shear structures with normal kinematics. The sequence of events and their age suggest that the hinterland Porto Belo Complex and the foreland Tijucas Fold Belt were juxtaposed already at ca. 650–645 Ma, which questions the validity of the subduction-related tectonic models in the northern Dom Feliciano Belt.

中文翻译：

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巴西南部圣卡塔琳娜州圣卡塔琳娜州 Dom Feliciano 带的主要 Gercino 剪切带和 Tijucas 褶皱带之间的压应变分区

摘要 从 Florianopolis 基石到 Dom Feliciano 带北部（巴西南部）的 Tijucas 褶皱带的复合横截面被划分为三个构造域：主要 Gercino 剪切带、上部构造的布鲁斯克杂岩和基础设施的 Camboriu 杂岩。构造域之间的运动学相关性基于与地质年代学相结合的构造和岩石学数据。650-645 Ma 的倾斜碰撞事件影响了所有结构域，在 Porto Belo Complex 中记录得最好，它显示了混杂化 (700 °C/4.3 kbar) 和沿主要 Gercino 剪切的从顶部到 NNW + 右旋剪切区。随后的应变划分导致在 Quatro Ilhas Granitoids (625-615 Ma) 中记录的渐进切向运动，随后是由右旋走滑控制的后期花岗岩侵入体（615 Ma 之后）。同时，收缩成分被 Tijucas 褶皱带基础设施吸收，导致 Camboriu Complex 混合岩的折返（从 5 到 3.4 kbar）和上部结构的 Brusque 杂岩体（约 635 Ma）开裂。沿着复合体之间的右旋+正常分离带发生构造并置。因此，Brusque 杂岩体的局部加热达到角闪岩相条件和上部构造逆推向伸展，这在具有正常运动学的离散剪切结构中记录。事件的顺序和它们的年龄表明，腹地波尔图贝罗复合体和前陆蒂茹卡斯褶皱带在大约 10 年代就已经并列了。650-645 Ma，这对 Dom Feliciano 带北部与俯冲相关的构造模型的有效性提出了质疑。