埋藏变质作用

陕北鄂尔多斯盆地埋藏变质作用研究

Burial metamorphism of the Ordos Basin in Northern Shaanxi

本文系统地研究了陕北鄂尔多斯盆地的埋藏变质作用。

Burial metamorphism has been found in the Ordos basin of northern Shaanxi .

铜质来源于火山喷发分异，火山后期热液形成铜的初步富集，后经埋藏变质作用，形成含矿热液进一步叠加而成。

The Cu come from the late period of volcanic eruption , the syngenetic hydrothermal made copper enriched primarily . After buried metamorphism ,, the anaphase hydrothermal made progressive copper enrichment in ore.

研究认为，本区玄武岩具大陆拉斑玄武岩特征，铜矿属火山同生热液成矿叠加埋藏变质作用改造形成的玄武岩铜矿。

It is believed that the basalt in the area is characterized by continental tholeiite and the copper deposit belongs to a basalt type copper deposit formed by syn-volcanic hydrothermal mineralization superimposed by buried metamorphic transformation .

并认为区域极低级变质作用主要源于印支造山前的成岩（埋藏）变质作用。

And the extremely weak regional metamorphism should be pre-Indosinian diagenic ( burial ) metamorphism .