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靠近火星上的生命:好奇号标识首次矿物

发布时间:2018-09-18 11:13 作者:admin 来源: 点击: 字号:

For the first time in its mission to study 大发Mars and the potential for life on it, the Curiosity Rover has identified a mineral。 The rover took samples by drilling in a Martian mountain and was then able to make the identification。 The mineral in case is called hematite

This image shows the first holes drilled by NASA’;s Mars rover Curiosity at Mount Sharp。 The loose material near the drill holes is drill tailings *** an accumulation of dust that slid down the rock during drilling。 Image credit: NASA/JPL-Caltech/MSSS

Hematite is an iron oxide (Fe2O3) –; one of several iron oxides actually。 Colored black to steel or silver-gray, brown to reddish brown, or rarely red, hematite is usually associated with water, but it can occur without water as well。 The spectral signature of hematite was seen on the planet Mars by the infrared spectrometer on the NASA Mars Global Surveyor (“;MGS”;) and 2001 Mars Odyssey spacecraft in orbit around Mars。 However, this is the first time the mineral has been identified in sit********>Curiosity Project Scientist John Grotzinger, of the California Institute of Technology in Pasadena, said in a statement:

“This connects us with the mineral identifications from orbit, which can now help guide our investigations as we climb the slope and test hypotheses derived from the orbital mapping。”

Naturally, this find is interesting for several reasons。 First of all, since the mineral typically occurs in aqueous environments and its existence on Mars was confirmed, it could be an indication of former (or perhaps even present) Mars habitation。

“We’ve reached the part of the crater where we have the mineralogical information that was important in selection of Gale Crater as the landing site,” said Ralph Milliken of Brown University, Providence, Rhode Island, and member of Curiosity’s science team。 “We’re now on a path where the orbital data can help us predict what minerals we’ll find and make good choices about where to drill。 Analyses like these will help us place rover-scale observations into the broader geologic history of Gale that we see from orbital data。”

Hematite is a good environmental indicator –; in other words, there’;s a good chance that studies on the mineral can reveal how the surface of the Red Planet looked like in the geological past。 Also, the fact that Curiosity was able to identify the mineral is also a good sign; it shows that the machines are working fine and we can expect more intriguing discoveries in the future。 For example, this tiny sample alone contains magnetite, hematite and olivine in a range of oxidization states。

本文源自: 环亚娱乐

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