Seismic detection of the martian core
Seismic detection of the martian core
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火星核心的地震探测
作者：
S. Stähler;Amir Khan;W. Banerdt;P. Lognonné;D. Giardini;S. Ceylan;M. Drilleau;A. Duran;R. Garcia;Quancheng Huang;Doyeon Kim;V. Lekić;H. Samuel;M. Schimmel;N. Schmerr;D. Sollberger;É. Stutzmann;Zongbo Xu;D. Antonangeli;C. Charalambous;P. Davis;J. Irving;T. Kawamura;M. Knapmeyer;R. Maguire;A. Marusiak;M. Panning;C. Perrin;A. Plesa;A. Rivoldini;C. Schmelzbach;G. Zenhäusern;É. Beucler;J. Clinton;N. Dahmen;M. van Driel;T. Gudkova;A. Horleston;W. Pike;M. Plasman;S. Smrekar
由于缺乏直接的地震观测，火星的内部结构一直是个谜。Khan等人、Knapmeyer-Endran等人和Stähler等人。使用了在洞察任务中部署的地震仪最近检测到的边缘信号，以绘制火星内部的地图(参见Cottaar和Koelemeijer的透视图)。火星可能有24到72公里厚的地壳，岩石圈非常深，接近500公里。与地球类似，岩石圈下面可能存在一个低速层。火星的地壳可能高度富含放射性元素，这些元素有助于加热这一层，但损害了火星内部。火星的核心是液体和大的，∼为1830公里，这意味着地幔只有一个岩石层，而不是像地球一样有两个岩石层。这些结果提供了火星的初步结构，有助于约束解释火星化学和内部动力学的不同理论。科学，abf2966，abf8966，abi7730，本期第434页，第438页，第443页另见abj8914，第388页来自火星洞察任务的数据有助于限制火星内部的结构和性质。一颗行星的地质史的线索包含在它的内部结构中，特别是它的核心。我们使用Insight地震数据探测到来自火星核-地幔边界的地震波反射，并将这些反射与大地测量数据一起反演，将液态金属核的半径限制在1830±40公里。大核意味着火星地幔在矿物学上类似于地球上地幔和过渡带，但不同于地球，不同于地球的是没有以钠长石为主的下地幔。我们推断，平均核心密度为每立方厘米5.7至6.3克，这需要大量的轻元素溶解在铁镍核心中。从Insight的位置上看，地震核心的阴影覆盖了火星表面的一半，包括大多数潜在的活跃区域--例如Tharsis--可能限制了可检测到的浮云的数量。
Single seismometer structure Because of the lack of direct seismic observations, the interior structure of Mars has been a mystery. Khan et al., Knapmeyer-Endrun et al., and Stähler et al. used recently detected marsquakes from the seismometer deployed during the InSight mission to map the interior of Mars (see the Perspective by Cottaar and Koelemeijer). Mars likely has a 24- to 72-kilometer-thick crust with a very deep lithosphere close to 500 kilometers. Similar to the Earth, a low-velocity layer probably exists beneath the lithosphere. The crust of Mars is likely highly enriched in radioactive elements that help to heat this layer at the expense of the interior. The core of Mars is liquid and large, ∼1830 kilometers, which means that the mantle has only one rocky layer rather than two like the Earth has. These results provide a preliminary structure of Mars that helps to constrain the different theories explaining the chemistry and internal dynamics of the planet. Science, abf2966, abf8966, abi7730, this issue p. 434, p. 438, p. 443 see also abj8914, p. 388 Data from the InSight mission on Mars help constrain the structure and properties of the martian interior. Clues to a planet’s geologic history are contained in its interior structure, particularly its core. We detected reflections of seismic waves from the core-mantle boundary of Mars using InSight seismic data and inverted these together with geodetic data to constrain the radius of the liquid metal core to 1830 ± 40 kilometers. The large core implies a martian mantle mineralogically similar to the terrestrial upper mantle and transition zone but differing from Earth by not having a bridgmanite-dominated lower mantle. We inferred a mean core density of 5.7 to 6.3 grams per cubic centimeter, which requires a substantial complement of light elements dissolved in the iron-nickel core. The seismic core shadow as seen from InSight’s location covers half the surface of Mars, including the majority of potentially active regions—e.g., Tharsis—possibly limiting the number of detectable marsquakes.
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影响因子：
5
作者：
K. Tsuno;D. Grewal;R. Dasgupta
通讯作者：
K. Tsuno;D. Grewal;R. Dasgupta
影响因子：
10.3
作者：
J. Clinton;D. Giardini;M. Böse;M. Böse;S. Ceylan;M. Driel;F. Euchner;R. Garcia;S. Kedar;Amir Khan;S. Stähler;B. Banerdt;P. Lognonné;É. Beucler;I. Daubar;M. Drilleau;M. Golombek;T. Kawamura;M. Knapmeyer;B. Knapmeyer‐Endrun;D. Mimoun;A. Mocquet;M. Panning;C. Perrin;N. Teanby
通讯作者：
J. Clinton;D. Giardini;M. Böse;M. Böse;S. Ceylan;M. Driel;F. Euchner;R. Garcia;S. Kedar;Amir Khan;S. Stähler;B. Banerdt;P. Lognonné;É. Beucler;I. Daubar;M. Drilleau;M. Golombek;T. Kawamura;M. Knapmeyer;B. Knapmeyer‐Endrun;D. Mimoun;A. Mocquet;M. Panning;C. Perrin;N. Teanby
博戈斯洛夫火山的共喷震颤：区域距离的地震波场组成
影响因子：
3.5
作者：
Haney, Matthew M.;Fee, David;McKee, Kathleen F.;Lyons, John J.;Matoza, Robin S.;Wech, Aaron G.;Tepp, Gabrielle;Searcy, Cheryl;Mikesell, T. Dylan
通讯作者：
Mikesell, T. Dylan
火星的组成
影响因子：
5
作者：
Yoshizaki, Takashi;McDonough, William F.
通讯作者：
McDonough, William F.