Encyclopedia of the Solar System 2nd ed

260 Encyclopedia of the Solar System During substantial heating, noble gases and other atmophile elements—like carbon and nitrog ...

Meteorites 261 have existed in the solar system because chondrites are numerous (Table 1). Chondrites (and many achondrites) dat ...

262 Encyclopedia of the Solar System groups. The total iron in some enstatite (E) chondrites ex- ceeds that in the H group of or ...

Meteorites 263 the oxygen-containing silicate inclusions from IIIAB irons, suggesting that they, too, may be related to the HED ...

264 Encyclopedia of the Solar System (a) (b) (c) FIGURE 12 Petrographic (2.5-mm-wide) thin sections in polarized transmitted lig ...

Meteorites 265 (> 100 μm) feldspar characterize very rare type 7. These pigeonholes approximate a chondritic thermal metamor- ...

266 Encyclopedia of the Solar System Chemical changes involving loss of a constituent, like carbon or water in chondrites, requi ...

Meteorites 267 to chondrule-containing meteorites prompt this classifica- tion. Compositionally, C1 (or CI) chondrites closely r ...

268 Encyclopedia of the Solar System TABLE 6 Extinct Radionuclides Whose Decay Products Are Detected in Meteorites Radio- Half-l ...

Meteorites 269 3. Meteorites of Asteroidal Origin and their Parent Bodies 3.1 The Meteorite–Asteroid Connection Two links have a ...

270 Encyclopedia of the Solar System Meteoritic terrestrial ages are generally based upon decay of cosmogenic radionuclides (Fig ...

Meteorites 271 FIGURE 14 Lithophile element concentrations (K vs. La) in ordinary and Cl chondrites and samples of evolved bodie ...

272 Encyclopedia of the Solar System spectrometers can determine very small noble gas concen- trations in a meteorite and, in ad ...

Meteorites 273 FIGURE 15 Three-isotope plot for stable Ne isotopes in ALH 85151 chondrite. Data for separated mineral grains lie ...

274 Encyclopedia of the Solar System FIGURE 16 Stable Ba isotopes in a SiC separate from the Murchison CM chondrite normalized t ...

Meteorites 275 they exhibitFractionated andUnidentifiedNuclear isotopic effects involving not only Kr and Xe but also elements l ...

276 Encyclopedia of the Solar System in the more refractory siderophiles: They contain essentially no volatiles, or lithophiles ...

Meteorites 277 nor mass-independent. Two alternative explanations ex- ist. Enstatite meteorites may derive from a single parent ...

278 Encyclopedia of the Solar System martian meteorites and one H4 are∼150 ka. Their terres- trial age distribution may depend o ...

Meteorites 279 chondrites includes mainly LL6. The fall frequency of most ordinary chondrites (except H5) has long been known to ...