| 1. | It was the study of chondrites that allowed researchers to work out how old the solar system is 研究者通过研究球粒状陨石而得出太阳系的年龄。 |
| 2. | To reach back , you need to look in the dust grains in chondrites , rather than at the chondrules 如果是追溯太阳系形成之前,你需要研究球粒状陨石中的灰尘颗粒,而不是陨石球粒。 |
| 3. | Chondrite normalized ree distribution patterns for the core q43 are comparable to those of the sediment of changjiang river and huanghe river delta 球粒陨石标准化后的稀土元素具有与长江、黄河、黄土等上陆壳沉积物相一致的特征。 |
| 4. | The average composition for our sample is different in some ways from the ci chondrite meteorites : namely we found more zinc , gallium , and copper , and less sulfur 我们样品的平均成分水平在某些方面与ci球粒陨石不同:即我们发现有较多的锌、镓和铜及较少的硫。 |
| 5. | Even after making generous assumptions , we determined that the maximum temperature reached in carbonaceous - chondrite asteroids with a diameter of 80 kilometers or more would be only 670 degrees c , too low to cause any melting at all 即使给予很宽松的假设,我们认为直径在80公里或以上的碳质球粒陨石小行星,达到的最高温度只有670 ,不足以造成任何的熔化。 |
| 6. | Thermal models show that even if the asteroids assembled immediately after the formation of the chondrules , 26al heating would have raised temperatures in the interiors of ordinary - chondrite bodies to a maximum of 1 , 100 degrees c ? high enough to cause melting of metals and sulfides but too low to melt silicate minerals extensively and differentiate an asteroid 热模型显示,即使小行星在球粒形成之后立刻聚合,铝26的加热最多也只能将普通球粒陨石内的温度提高到1100 ,虽可使金属和硫化物熔化,但并不足以将矽酸盐矿物大量熔化并造成小行星各层分异。 |
| 7. | Comparative studies of ree geochemical characteristics of various geologic bodies in the deposit indicate that the various ores and alkaline volcanic rocks contain abundant ree , specially lree the chondrite - normalized patterns of both ores and alkaline volcanic rocks show a strong lree enrichment and positive eu anomaly , in contrasting with the dolostones which show slight lree enrichment and moderately negative eu anomaly 同期成矿流体从早期到晚期(块状矿石条带状矿石) ,轻重稀土分异变小,稀土总量增加,条带状矿石中稀土含量最高;矿石黄铜矿6345值变化在一0 . 3编到2 . 8 % 。范围,显示慢源硫特征;菱铁矿6 ’ 3c ( 8 % 。 |