Bukti berusia 2 miliar tahun dari aktivitas gunung berapi di Mars
Meteorit yang ditemukan di Afrika memberikan petunjuk tentang evolusi planet merah
Tanggal:
2 Februari 2017
Sumber:
University of Houston
Ringkasan:
Analisis dari meteorit Mars yang ditemukan di Afrika pada tahun 2012 memiliki
menemukan bukti minimal 2 miliar tahun dari aktivitas gunung berapi di Mars.
Ini menegaskan bahwa beberapa gunung berapi hidup-terpanjang di tata surya dapat
ditemukan di Planet Merah.
..............................
Analisis dari meteorit Mars yang ditemukan di Afrika pada tahun 2012 memiliki
menemukan bukti minimal 2 miliar tahun dari aktivitas gunung berapi di Mars.
Ini menegaskan bahwa beberapa gunung berapi hidup-terpanjang di tata surya
dapat ditemukan di Planet Merah.
perisai gunung berapi dan dataran lava yang terbentuk dari lava yang mengalir
dengan jarak jauh, mirip dengan pembentukan Kepulauan Hawaii. Gunung berapi Mars
terbesar, Olympus Mons, hampir 17 mil tingginya. Itu hampir tiga kali lipat
ketinggian gunung berapi tertinggi di Bumi, Mauna Kea, di 6,25 mil.
Tom Lapen, seorang profesor geologi di University of Houston dan penulis utama
dari makalah yang diterbitkan 1 Februari di jurnal Science advances, mengatakan
temuan ini menawarkan petunjuk baru tentang bagaimana planet berevolusi dan
wawasan ke dalam sejarah aktivitas gunung berapi di Mars.
Banyak dari apa yang kita ketahui tentang komposisi batuan dari gunung berapi
di Mars berasal dari meteorit yang ditemukan di Bumi. Analisis zat yang berbeda
memberikan informasi tentang usia meteorit, sumber magma, panjang waktu dalam
ruang dan berapa lama meteorit itu di permukaan bumi.
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label
Evidence of 2 billion years of volcanic activity on Mars,Bukti dari 2 miliar tahun dari
aktivitas gunung berapi di Mars,Meteorite,Martian meteorite,Red Planet,Mars
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Evidence of 2 billion years of volcanic activity on Mars
Meteorite found in Africa provides clues to evolution of the red planet
Date:
February
2, 2017
Source:
University
of Houston
Summary:
Analysis of a Martian meteorite found in Africa in 2012 has
uncovered evidence of at least 2 billion years of volcanic activity on Mars.
This confirms that some of the longest-lived volcanoes in the solar system may
be found on the Red Planet.
..............................
Analysis of a Martian meteorite found in Africa in 2012 has uncovered
evidence of at least 2 billion years of volcanic activity on Mars. This
confirms that some of the longest-lived volcanoes in the solar system may be
found on the Red Planet.
Shield volcanoes and lava plains formed from lava flowing over long
distances, similar to the formation of the Hawaiian Islands. The largest
Martian volcano, Olympus Mons, is nearly 17 miles high. That's almost triple
the height of Earth's tallest volcano, Mauna Kea, at 6.25 miles.
Tom Lapen, a geology professor at the University of Houston and lead author
of a paper published Feb. 1 in the journal Science Advances, said
the findings offer new clues to how the planet evolved and insight into the
history of volcanic activity on Mars.
Much of what we know about the composition of rocks from volcanoes on Mars
comes from meteorites found on Earth. Analysis of different substances provides
information about the age of the meteorite, its magma source, length of time in
space and how long the meteorite was on Earth's surface.
Something slammed into the surface of Mars 1 million years ago, hitting a
volcano or lava plain. This impact ejected rocks into space. Fragments of these
rocks crossed Earth's orbit and fell as meteorites.
The meteorite, known as Northwest Africa 7635 and discovered in 2012, was
found to be a type of volcanic rock called a shergottite. Eleven of these
Martian meteorites, with similar chemical composition and ejection time, have
been found.
"We see that they came from a similar volcanic source," Lapen
said. "Given that they also have the same ejection time, we can conclude
that these come from the same location on Mars."
Together, these meteorites provide information about a single location on
Mars. Previously analyzed meteorites range in age from 327 million to 600
million years old. In contrast, the meteorite analyzed by Lapen's research team
was formed 2.4 billion years ago and suggests that it was ejected from one of
the longest-lived volcanic centers in the solar system.
Story Source:
Journal Reference:
1.
Thomas J. Lapen, Minako Righter, Rasmus Andreasen, Anthony J. Irving, Aaron
M. Satkoski, Brian L. Beard, Kunihiko Nishiizumi, A. J. Timothy Jull, Marc W.
Caffee. Two billion years of magmatism recorded from a single Mars
meteorite ejection site. Science Advances, 2017; 3 (2):
e1600922 DOI: 10.1126/sciadv.1600922
