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首页> 外文期刊>Earth and Planetary Science Letters: A Letter Journal Devoted to the Development in Time of the Earth and Planetary System >A permeability estimate in 56 Ma crust at ODP Hole 642E, Voring Plateau Norwegian Sea
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A permeability estimate in 56 Ma crust at ODP Hole 642E, Voring Plateau Norwegian Sea

机译：挪威高船高原ODP 642E孔56 Ma地壳的渗透率估算

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摘要

Temperature measurements made in Ocean Drilling Program (ODP) Hole 642E are used to estimate bulk crustal permeability. Hole 642E is located on the Voring Plateau near the transition between oceanic and continental crust on a volcanically rifted margin. A temperature - depth profile measured 20 yr after the hole was drilled indicates fluid flowing from the basement, up the Hole and into the ocean. This flow regime suggests that the basement is naturally over pressured with respect to hydrostatic. We estimate the up-hole flow rate to be approximately 6-11 m h(-1). This flow rate, coupled with an estimated minimum differential overpressure of 13-20 kPa, and an estimated aquifer thickness of 100 m, yields a bulk permeability of 10(-13) m(2). This result suggests that fluid flow through basement may be an important component of passive margin hydrology.
机译：在海洋钻探计划（ODP）孔642E中进行的温度测量用于估算大块地壳渗透率。孔642E位于Voring高原上，靠近火山裂谷边缘的大洋壳与大陆壳之间的过渡。钻完孔20年后测得的温度-深度曲线表明，流体从地下室流入孔，并向上流入海洋。这种流动状态表明地下室相对于静水压力自然过大。我们估计井上流速约为6-11 m h（-1）。该流速加上估计的13-20 kPa最小最小过压和100 m的含水层厚度，可产生10（-13）m（2）的整体渗透率。该结果表明，流经地下室的流体可能是被动边缘水文学的重要组成部分。

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