略论拉张性“花状”构造成因

BRIEFING ORIGIN OF EXTENSIONAL TULIP-LIKE STRUCTURES

拉张性“花状”构造可以分为对称性，非对称性和复合的三种亚样式，它们虽然在许多几何特征上与负花状构过类似，但成因却有本质的不同，其各级别断层是依次发育的，亚样式类型取决于断层形态，断层形态受沉积压实、异常流体压力等控制，由于控制因素空间上复杂变化造成亚样式的多样型。

Structures formed by extension can be divided into three sub-style:SNFG,ANFG and CNFG.Although they are geometrically similar to negative flower(tulip)structures,essential difference occurs in their origins.The faults of any sub-style formed in the branch's order.The type of the sub-style depends on the shape of fault,which,in turn,is controlled by sedimentary compaction,abnormal fluid pressure and so on.Just because the complexities of the controls in space occur, the multiplicity of the sub-style is inevitable.