优地槽

川西盐边群的优地槽岩石组合

Eugeosyncline rock association of Yanbian group in Western sichuan , China

随后大洋底板活动的减弱，则招致褶皱陆壳的剥蚀，并伴有广泛展布的玄武岩岩浆作用，以及大洋周边优地槽区的稳定化。

The following decrease of the oceanic floor spreading activity results in degradation of folded continental crust , accompanied by wide extending of basalt magmatism and stabilization of eugeosyncline regime on the peripheries of the oceans .

该成矿带位于北祁连加里东优地槽的东南缘。这里是向南俯冲敛合板块残留的岛弧。CAB插槽42和地、CAB插槽5。

Being the residual island are of the convergent plate subducted to the south , the central Baiyin Minerogenetic Belt is located at the southeast edge of the north Qilian Caledonian eugeosyncline .

在Blatt等（1972）图解中，落入优地槽区。

Fall into slot in Blatt etc. ( 1972 ) map .

祁连优地槽区块状硫化物矿床形成地质环境的初步对比研究和探讨

A preliminary investigation into the ore forming environment of the massive sulfide deposits in the Qilian eugeosyncline

区内含蓝闪石岩的原岩包括优地槽内发育的各类富钠火山岩、含富钠火山质的沉积岩。

The primary rocks include the various sodium-rich volcanic rocks and the sedimentary rocks with sodium-rich volcanic materials which are well developed in the North Qilian eugeosyncline area .

阐述了华南东部震旦－志留纪大地构造属性是大陆边缘弧（优地槽型建造）和弧背盆地（冒地槽型建造）造山带；

It is explained that the Sinian-Silurian geotectonic attribution of the east part of South China is an orogenic belt made up of a continental marginal arc ( eugeosynclinal type formation ) and a retroarc basin ( miogeosynclinal formation ) .