摘要
云山火山喷发盆地是福建省早白垩世最典型的火山构造,通过对云山火山喷发盆地形成的构造背景与成矿作用关系的研究,认为云山火山喷发盆地的演化与闽江口—永定断裂带的右行走滑有关,早白垩世初由于走滑断裂带在云山一带拐弯,在进一步走滑过程中逐渐发展演化成具有拉分盆地(Pull-apart basin)性质的火山构造洼地。随着主断裂的生长,北东东向的拉张区不断扩大,在拉分盆地发育末期,这种拉张作用遍及整个盆地。拉分盆地还控制了外围金、银、铅锌等矿床点的形成。
The Yunshan volcanic eruption basin is the most typical volcanic structure in Early Cretaceous strata of Fujian Province. Based on the research results of the tectonic setting of shaping the Yunshan volcanic eruption basin and the ore-forming process, it is considered that the evolution of the Yunshan volcanic eruption basin has relative to the right-lateral shove of the Minjiangkou-Yongding fault zone. Because the strike-slip fault zones turn a corner in Yunshan area at the beginning of Early Cretaceous, during the further strike-slip process they gradually develops the volcano-tectonic depression which is characteristic of the pull-apart basin. In company with the development of main faults, the extension region of the east-northeast trend keeps on broadening. In the evolutional terminal phase of the pull- apart basin, the extension exists in the basin all over. The mineral deposits such as gold, silver, led and zinc around the periphery of the basin are controlled by the pull-apart basin.
出处
《福建地质》
2008年第2期130-136,共7页
Geology of Fujian
关键词
火山喷发盆地
构造背景
右行走滑
拉分盆地
福建云山
volcanic eruption basin, tectonic setting, right-lateral shove, pull-apart basin, Fujian Province
