Determining the composition of the Earth

被引：294

作者：

Drake, MJ ^{[1
]}

Righter, K ^{[1
]}

机构：

[1] Univ Arizona, Lunar & Planetary Lab, Tucson, AZ 85721 USA

来源：

NATURE | 2002年 / 416卷 / 6876期

基金：

美国国家科学基金会; 美国国家航空航天局;

关键词：

D O I：

10.1038/416039a

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

A long-standing question in the planetary sciences asks what the Earth is made of. For historical reasons, volatile-depleted primitive materials similar to current chondritic meteorites were long considered to provide the 'building blocks' of the terrestrial planets. But material from the Earth, Mars, comets and various meteorites have Mg/Si and Al/Si ratios, oxygen-isotope ratios, osmium-isotope ratios and D/H, Ar/H2O and Kr/Xe ratios such that no primitive material similar to the Earth's mantle is currently represented in our meteorite collections. The 'building blocks' of the Earth must instead be composed of unsampled 'Earth chondrite' or 'Earth achondrite'.

引用

页码：39 / 44

页数：6

共 46 条

[1]

Abe Y., 2000, ORIGIN EARTH MOON, P413

[2] THE CHEMICAL-COMPOSITION OF THE EARTH [J].

ALLEGRE, CJ ;

POIRIER, JP ;

HUMLER, E ;

HOFMANN, AW .

EARTH AND PLANETARY SCIENCE LETTERS, 1995, 134 (3-4) :515-526

[3] COMPOSITION OF THE EARTH [J].

ANDERSON, DL .

SCIENCE, 1989, 243 (4889) :367-370

[4]

Brearley A.J., 1998, REV MINERALOGY, V36

[5] The fall, recovery, orbit, and composition of the Tagish Lake meteorite: A new type of carbonaceous chondrite [J].

Brown, PG ;

Hildebrand, AR ;

Zolensky, ME ;

Grady, M ;

Clayton, RN ;

Mayeda, TK ;

Tagliaferri, E ;

Spalding, R ;

MacRae, ND ;

Hoffman, EL ;

Mittlefehldt, DW ;

Wacker, JF ;

Bird, JA ;

Campbell, MD ;

Carpenter, R ;

Gingerich, H ;

Glatiotis, M ;

Greiner, E ;

Mazur, MJ ;

McCausland, PJA ;

Plotkin, H ;

Mazur, TR .

SCIENCE, 2000, 290 (5490) :320-325

[6]

Cameron AGW, 2000, Origin of the Earth and Moon, P133

[7] Origin of the Moon in a giant impact near the end of the Earth's formation [J].

Canup, RM ;

Asphaug, E .

NATURE, 2001, 412 (6848) :708-712

[8] THERMAL EXPANSIVITY IN THE LOWER MANTLE [J].

CHOPELAS, A ;

BOEHLER, R .

GEOPHYSICAL RESEARCH LETTERS, 1992, 19 (19) :1983-1986

[9]

Chou C.-L., 1978, P LUNAR PLANET SCI C, V9, P219

[10] OXYGEN ISOTOPE STUDIES OF ORDINARY CHONDRITES [J].

CLAYTON, RN ;

MAYEDA, TK ;

GOSWAMI, JN ;

OLSEN, EJ .

GEOCHIMICA ET COSMOCHIMICA ACTA, 1991, 55 (08) :2317-2337

← 1 2 3 4 5 →