月球火山活动热动力机制

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【人民日报】嫦娥六号样品最新研究揭秘月球“休眠”为何还有火山喷发
Ren Min Ri Bao· 2025-08-25 03:02
Core Insights - The research challenges the long-held belief that the Moon became "dormant" 3 billion years ago, revealing that volcanic activity persisted during its "late period" [1][2] - A new thermodynamic mechanism is proposed, indicating that magma was trapped in the upper mantle, leading to volcanic eruptions due to heat transfer [2][3] Group 1: Research Findings - The Chang'e 5 and Chang'e 6 missions returned basalt samples dated at 2.0 billion and 2.8 billion years, respectively, confirming ongoing volcanic activity [1] - Two distinct types of basalt were identified from the Chang'e 6 samples, originating from different depths in the Moon's mantle: ultra-low-titanium basalt from over 120 km deep and low-titanium basalt from 60-80 km deep [1][2] - The study revealed that the volcanic activity's heat source transitioned around 3 billion years ago, shifting from a complex array of sources to a dominant upward heat transfer mechanism [2] Group 2: Implications - The findings provide new insights into the thermal evolution history of the Moon and may serve as a reference for understanding volcanic activity mechanisms on other small, airless celestial bodies [3]
月球“休眠”为何还有火山喷发
Ren Min Ri Bao· 2025-08-24 22:40
Core Insights - The research challenges the long-held belief that the Moon has been "dormant" for 3 billion years, revealing that volcanic activity occurred as recently as 2 billion years ago and 2.8 billion years ago, indicating ongoing geological processes [1][2] Group 1: Research Findings - The study identified two distinct types of basalt from the Chang'e 6 samples, one originating from deep within the Moon's mantle (over 120 kilometers) and the other from a shallower depth (60-80 kilometers) [1] - A new thermal dynamic mechanism was proposed, suggesting that as the Moon cooled, the lithosphere thickened, trapping magma in the upper mantle, which then led to volcanic eruptions by transferring heat upward [2] - Analysis of lunar remote sensing data indicated a significant change in volcanic activity mechanisms around 3 billion years ago, shifting from a complex array of heat sources to a dominant upward heat transfer mechanism [2] Group 2: Implications - The findings provide new insights into the thermal evolution history of the Moon and serve as a reference for understanding volcanic activity mechanisms on other small, airless celestial bodies [3]
嫦娥六号样品最新研究揭秘 月球“休眠”为何还有火山喷发
Ren Min Ri Bao· 2025-08-24 22:03
Core Viewpoint - The research conducted on lunar samples from China's Chang'e 5 and Chang'e 6 missions reveals that the Moon experienced volcanic activity much later than previously believed, challenging the notion that it became "dormant" 3 billion years ago [1][2]. Group 1: Research Findings - The study identified two types of basalt from the Chang'e 6 samples, formed around 2.8 billion and 2.9 billion years ago, with distinct compositions and sources: one type originates from deep within the lunar mantle (over 120 kilometers), while the other comes from a shallower mantle (60-80 kilometers) [1][2]. - The research team proposed a new thermal dynamic mechanism for lunar volcanism, suggesting that as the Moon cooled, its lithosphere thickened, trapping magma in the shallow mantle, which could then transfer heat upward, leading to volcanic eruptions [2]. Group 2: Implications and Broader Context - The findings not only revise the understanding of the Moon's thermal evolution history but also provide significant insights into the volcanic activity mechanisms of other small, airless celestial bodies [3].
我国科学家揭秘月球“晚年”为何还有火山喷发
Yang Shi Xin Wen· 2025-08-22 21:28
Core Insights - The study challenges the long-held belief that the Moon became "dormant" 3 billion years ago, revealing that volcanic activity continued much later, supported by samples from China's Chang'e 5 and 6 missions [1][2] - A new heat-driven mechanism is proposed for the Moon's volcanic activity, indicating that magma was trapped in the upper mantle and could trigger eruptions through heat transfer [2][3] Group 1: Research Findings - The research team identified two types of basalt from the Chang'e 6 samples, formed around 2.8 billion and 2.9 billion years ago, with distinct compositions and sources [1] - One type is "ultra-low titanium basalt" from deep within the Moon's mantle (over 120 kilometers), while the other is "low titanium basalt" from a shallower mantle (60-80 kilometers) [1] - The study simulated high-temperature and high-pressure conditions to understand the formation of these basalt types, linking them to different layers formed from the cooling of the early lunar magma ocean [1] Group 2: Mechanism of Volcanic Activity - Traditional theories suggested that late lunar volcanic activity was linked to water-rich or radioactive heat-producing elements, but the samples disproved this, showing a "dry" source lacking radioactive elements [2] - The new mechanism suggests that as the Moon cooled, the lithosphere thickened, preventing deep magma from erupting and causing it to remain in the upper mantle, where it could melt partially and lead to eruptions [2] - Analysis of lunar remote sensing data indicated a significant change in the heat-driven mechanism around 3 billion years ago, shifting from a complex heat source to a dominant upward heat transfer mechanism [2] Group 3: Implications - This research not only updates the understanding of the Moon's thermal evolution history but also provides important references for explaining volcanic activity mechanisms on other small, airless celestial bodies [3]