摘要
北美西部科迪勒拉山系中段东部存在广阔的地洼区,主要分布于中、南落基山和科罗拉多高原以及新墨西哥州中部、俄克拉荷马州南部和得克萨斯州北部。它们在大地构造属性上与中国东部地洼区是相同的,都是后地台阶段的活动型大地构造单元,二者在构造型相、沉积建造、岩浆活动顺序、与地槽区的关系等方面,具有相似特征,而在岩浆类型、区域性隆起规模等方面有显着差异,可能反映地台活化深部机制的差异。
Diwa regions are extensively distributed in the eastern part of the middle segment of the Cordillera Mountain System,mainly in Central and Southern Rocky Mountains and the Colorado Plateau as well as in middle New Mexico, southern Oklahoma and northern Texas. They are identical to the diwa regions,,in eastern China, which have been well studied, in such aspects as the construction of structural layers, structural styles, sedimentary formations, magmatism sequences and the relationship with adjoining geosynclinal regions, etc. On the other hand, they have their own characteristics which differ from the eastern Chinese diwa regions, such as the dominant magma type and amplitude of regional uplifting, which may be the reflection of the differences of deep mechanism of platform activation.
出处
《大地构造与成矿学》
EI
CAS
CSCD
1989年第4期352-363,共12页
Geotectonica et Metallogenia
