Structure of the sheeted dike complex of the Samail Ophiolite near Ibra, Oman
Structure of the sheeted dike complex of the Samail Ophiolite near Ibra, Oman
复制标题
阿曼伊布拉附近萨梅尔蛇绿岩片状堤坝复合体的结构
DOI：
--
复制
发表时间：
1981
期刊：
影响因子：
--
通讯作者：
J. Pallister
中科院分区：
文献类型：
--
作者：
J. Pallister
席状岩墙杂岩是一个区域性可制图的地质单元，在Samail蛇绿岩地层中具有一致的位置。阿曼山脉东南部Ibra地区杂岩的不连续暴露提供了结构数据，允许重建该地区347°的古扩张脊轴，并建议蛇绿岩的最大扩张宽度为275 km。接触关系暴露良好的艾哈迈迪部分内表明，复杂的形成了多个平行侵入在一个狭窄的区域在古脊轴。裂脉多;面向方向指示了当前露头区域西南方向的扩张脊，与其他扩张轴方向指示相冲突。
The sheeted dike complex is a regionally mappable geologic unit with a consistent position in the Samail ophiolite stratigraphy. Discontinuous exposures of the complex in the Ibra area of the southeast Oman Mountains provide structural data that allow reconstruction of a paleo-spreading ridge axis of 347° for the region and suggests a maximum spreading width of 275 km for the ophiolite. Contact relations within the well-exposed Al Ahmadi section indicate that the complex was formed by multiple parallel intrusion over a narrow zone at the paleo-ridge axis. Split dikes are abundant; facing directions indicate a spreading ridge southwest of the present outcrop area, in conflict with other spreading axis direction indicators.