三叉裂谷系
The southwestern part of the Ordos Block was a rift continental margin opened to the Qinling and Helan trough of the Qinling-Qilian-Helan three-arm rift system in Early Paleozoic.
鄂尔多斯地块西南部早古生代为界于秦祁贺三叉裂谷系之秦岭、贺兰裂谷间的大陆边缘。
The formation of petroleum system is related to the geodynamic environment of basin, accordingly the main petroleum systems fall into three types: the continental rift, the platform and the orogenic.
油气系统在不同地球动力学环境下形成裂谷型油气系统、台地型油气系统和造山型油气系统。
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