概括
大规模的硫化物沉积物正在东太平洋峰上积极形成. 由和-3异常证明的热水泉活动证实了这个地质活跃地区正在进行的硫化物生产.
科学领域:
- 海洋地质学 海洋地质学
- 地质化学 地质化学
- 海洋学 海洋学 海洋学
背景情况:
- 大规模的硫化物沉积物是中洋山脊上发现的重要地质构成.
- 东太平洋上升是一个高度活跃的传播中心,以热水活动而闻名.
研究的目的:
- 为了调查巨大的硫化物沉积物的存在和形成.
- 为了评估东太平洋海拔沿线的当前热水活动.
主要方法:
- 对和-3异常进行海水样本分析.
- 海底的地质绘制.
主要成果:
- 在东太平洋峰 (13°N) 发现了大量的大型硫化物沉积物.
- 显著的和-3异常表明了强烈的,当今的热水泉活动.
- 大规模的硫化物也在附近的离轴海底山上发现.
结论:
- 水热过程在东太平洋上升处积极产生大量硫化物.
- 观察到的异常证实了正在进行的地质活动和硫化物形成.
相关概念视频
03:12Freezing Point Depression and Boiling Point Elevation
Boiling Point Elevation
The boiling point of a liquid is the temperature at which its vapor pressure is equal to ambient atmospheric pressure. Since the vapor pressure of a solution is lowered due to the presence of nonvolatile solutes, it stands to reason that the solution’s boiling point will subsequently be increased. Vapor pressure increases with temperature, and so a solution will require a higher temperature than will pure solvent to achieve any given vapor pressure, including one...
The boiling point of a liquid is the temperature at which its vapor pressure is equal to ambient atmospheric pressure. Since the vapor pressure of a solution is lowered due to the presence of nonvolatile solutes, it stands to reason that the solution’s boiling point will subsequently be increased. Vapor pressure increases with temperature, and so a solution will require a higher temperature than will pure solvent to achieve any given vapor pressure, including one...
01:22Thermal Expansion
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01:27Thermal expansion and Thermal stress: Problem Solving
San Francisco's Golden Gate Bridge is exposed to temperatures ranging from -15 °C to 40 °C. At its coldest, the main span of the bridge is 1275 m long. Assuming that the bridge is made entirely of steel, what is the change in its length between these temperatures?
To solve the problem, first, identify the known and unknown quantities. The initial length (L) of the bridge is 1275 m, the coefficient of linear expansion (α) for steel is 12 x 10-6/°C, and the change in temperature (ΔT) is 55 °C.
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01:20Hot Weather Concreting
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01:27Cold Weather Concreting
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To counteract the negative impacts of cold weather, ensuring...
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01:18Deep Sea Microbial Ecology
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