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首页> 外文期刊>Journal of Volcanology and Geothermal Research >Peperites and associated pillow lavas subjacent to the Oman Ophiolite
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Peperites and associated pillow lavas subjacent to the Oman Ophiolite

机译：隶属于阿曼蛇绿岩的珍珠岩和相关的枕状熔岩

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摘要

Peperites are breccias consisting of a mix of cooled magma and sediment. They result from the intrusion of molten rock into water-saturated sediments. We report an occurrence of peperite in the Oman-United Arab Emirates (UAE) border region of Khattm al Shiklah, and characterize samples that have been collected from 6 locations east of Al Ain, UAE at Jabal Um Bak Jabal Hamra, and Jabal Dai in Oman. Geochemical analysis indicates that the magmas represented in these samples are related. In addition, field relations of the pillow lavas surrounded by limestone with deformed bedding and peperite boundaries between the pillows and the limestone are consistent with the pillow lavas forming directly within carbonate sediments. It is likely that the ambient pressure was great enough and cooling of the magma rapid enough to prevent large explosions. The fact that the magma also formed pillows is evidence of this. The rapid quenching of the magma by water-saturated, fine, unconsolidated sediments likely produced conditions similar to those attending pillow lava formation directly into water.
机译：角砾岩是角砾岩，由冷却的岩浆和沉积物组成。它们是由于熔融岩石侵入到水饱和的沉积物中所致。我们报告了在Khattm al Shiklah的阿曼-阿拉伯联合酋长国（UAE）边界地区发生的橄榄石，并表征了从阿联酋Al Ain以东6个地点在Jabal Um Bak Jabal Hamra和Jabal Dai中采集的样品的特征。阿曼。地球化学分析表明，这些样品中所代表的岩浆是相关的。此外，被石灰岩包围的枕状熔岩与变形的层理和枕形与石灰岩之间的钙铁矿边界的场关系与直接在碳酸盐沉积物中形成的枕状熔岩一致。环境压力可能足够大，并且岩浆的冷却足够快，可以防止大爆炸。岩浆也形成了枕头这一事实证明了这一点。水饱和的，细的，未固结的沉积物对岩浆的快速淬灭可能产生的条件类似于直接将枕形熔岩形成到水中的条件。

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