< p >你应该开始与< a href = " https://earthref.org/GERMRD/datamodel/ " rel = " nofollow noreferrer " > < / >生殖水库数据库。不容易使用网站,但最全面。你可以查找元素浓度在各种各样的“水库”,包括陨石。例如,查找< a href = " http://earthref.org/GERMRD/49/ " rel = " nofollow noreferrer " > CI球粒陨石< / >的元素值通常用于REE-diagram正常化。你可以通过特定的陨石,查找或平均组。由纸你可以看到值,在大多数情况下,他们还包括扫描从论文本身的原始数据。注意,实际上它通常也是良好的实践看报纸了解数据收集,分析,他们是什么意思。< / p > < p >说,至于你大意使用小行星作为稀有金属矿床:< / p > < blockquote > < p >…因为我想调查认为小行星代表股票的稀有资源丰富。< / p > < /引用> < p >作为一个经验法则,这适用于铂族金属(铂族元素)和相关(Te、非盟、Re)。原因是这些金属是亲铜或亲铁元素,在地球上,他们都集中在核心地壳和地幔和枯竭。(一些)小行星,这没有发生分化,这些元素的浓度仍然是(相对)在散装材料。然而,< / p > < p > REE和其他HFSE金属(例如Zr,高频,Nb, Ta),并不集中在核心。 In fact, being lithophile elements, they are particularly enriched in the Earth's crust. Going to mine them from asteroids will be pointless. Here are some more questions and answers that will clarify some concepts:
Why is uranium only in the crust, really?
What is the difference between chalcophile and siderophile elements?
What are the high field strength and large ion lithophile (HFS or HFSE & LIL or LILE) elements?