摘要
福建某地前震旦系变质岩中韧性剪切构造是在角闪岩相变质作用条件下形成的,以发育有狭窄的面状变形的高应变带——构造片岩带及其中的大量韧性变形迹象为其典型特征。对韧性剪切构造形成机制的讨论,认为成因上与早期岩层褶皱变形有密切的联系。与构造片岩带相伴产出的含锌、铍矿层,受控于片岩段中的透辉石岩层位,明显表现出层控特点。这是我省基底变质岩中又一新发现的含矿层位,其中受控于变质岩层位的铍矿类型在省内尚属首例。
The formation of the ductile shear structures in pre-Sinian metamorphic rocks found in the surveyed area is in the metamorphic environment of amphibolite facies, which are characteristic of the development of high strain belt and a narrow-planar deformation, tectonic schist zone and a number of ductile deformational traces. It is considered that the formation of the ductile deformation has a close relation with early fold deformation of the strata. Zincberyllium-bearing ore-beds associated with the tectonic schist facies are controlled on the diopsidite layer in the schist segment, which show an obvious stratabound characters. They are one more new ore-bearing layers found in the basal metamorphic rock in Fujian Province, in which the beryllium-bearing ore-beds controlled on the layers of metamorphic rocks were found for first time in Fujian Province.
出处
《福建地质》
1992年第3期213-222,共10页
Geology of Fujian
