胶南-威海造山带与罗迪尼亚(Rodinia)超大陆相关问题的初步探讨

Primary Study on Relative Problems between Jiaonan-Weihai Tectonic Belt and Rodinia Super Continent

摘要:

胶南威海造山带中的榴辉岩为晋宁早期板块俯冲作用的产物 ;沿造山带广泛分布的花岗质片麻岩 ,则为晋宁晚期板块由俯冲转为碰撞过程中同造山岩浆事件的产物。它们与全球性的格林威尔造山运动属同一事件范畴 ,但具有明显的穿时性。侵入于同造山花岗质片麻岩的片麻状花岗岩及震旦纪朋河石组 ,为后造山伸展机制下发生的岩浆及沉积事件的产物 ,与 70 0～ 6 5 0Ma期间Rodinia超大陆的裂解作用密切相关

Abstract:

Eclogite in Jiaonan-Weihai tectonic belt was the product of the plates in early Jinning period, and granitic gneiss is the product of orogenic magmatism when the plates transferred from underthrust to collision in late Jinning period. They had the characteristics of diachronism, but still belong to the same event scope of global Grenville orogeny. Gneissic granite intruded in synorogenic granitic gneiss and Pengheshi group of Sinian period were products of magmatic and sedimentary event under late orogenic ...