11.29 天外來物——鐵隕石

隕石是地球上的常客,司馬遷就曾對隕石有過精準的定義,他在《史記》天官書中寫:“星墜至地則石也”。所以隕石是指地球以外的太陽系天體的碎片,它們穿過地球的大氣層,自然隕落到地球成為隕石。大多數隕石來自於火星和木星間的小行星帶,小部分來自月球和火星。隕石可以分為鐵質隕石、石鐵混合隕石、石質隕石。鐵隕石似乎像一塊巨大的燒灼物體,表面佈滿了角形腔結構,科學家認為這可能是岩石邊緣的金屬晶體受到侵蝕後形成的,另一種可能的解釋是這些中空的腔形結構與橄欖石具體有關,這種物質可以在罕見的石隕石中發現,而後者形成的過程比較複雜,一般情況下科學家認為其形成於行星核幔附近的邊界層上,顯然石隕石是一種比較罕見的物質。近幾年,國內漸漸興起了一股隕石收藏熱潮。三四年間,不僅隕石的價格飆升,國內隕石收藏市場也日漸成形。在古代,人們往往把隕石當做聖物。比如,古羅馬人把隕石當做神的使者,他們在隕石墜落的地方蓋起鐘樓來供奉。匈牙利人則把隕石抬進教堂,用鏈子把它鎖起來,以防這個“神的禮物”飛回天上。伊斯蘭教聖地麥加也有一塊隕石,被視為“聖石”。據悉,每年降落到地球上的隕石有20多噸,數量有兩萬多塊,其中99%以上是石隕石和鐵隕石,石鐵隕石只佔幾乎0.3%左右的比例,換句話說,每年降落到地球上的石鐵隕石只有60塊左右,其中有一部分隕落在大海,一部分不能被人類發現珍藏,還有一部分被珍藏在大型博物館中。物以稀為貴,正因為此,石鐵隕石的商業價值極高,即使是大珍藏家,能夠珍藏到石鐵隕石的也寥寥無幾。Meteorites are a frequent visitor to the earth. Sima qian once had a precise definition of meteorites.So meteorites are pieces of objects outside the earth's solar system that pass through the earth's atmosphere and fall naturally to earth as meteorites.Most meteorites come from the asteroid belt between Mars and Jupiter, and a small number from the moon and Mars.Meteorites can be divided into iron meteorites, stone and iron mixed meteorites, stone meteorites.Iron meteorites, seems like a huge burning object surface was full of angular cavity structure, scientists say it may be on the edge of the metal rock crystals which are formed by erosion of another possible explanation is that the hollow cavity structures related to olivine concrete, this kind of material can be found in rare stone meteorites, while the latter process is more complex, scientists generally believe that formed in the nuclear curtain near the boundary layer on the planet, aerolite, apparently, is a relatively rare material.In recent years, the rise of a meteorite collection boom.In three or four years, not only the meteorite price soared, the domestic meteorite collection market is also taking shape.In ancient times, people often regarded meteorites as sacred objects.For example, the ancient Romans used meteorites as messengers of the gods.Hungarians carried the meteorite into the church and chained it to prevent the "gift" from flying back into the sky.There is also a meteorite in the islamic holy land of mecca, which is regarded as a "holy stone"., down to earth every year more than 20 tons, meteorites number has more than twenty thousand, more than 99% of them are aerolite and iron meteorites, pallasite only accounts for almost 0.3% of proportion, in other words, a year down to the earth's pallasite only about $60, among them are part of the fall in the sea, and part cannot be discovered, and part of the most treasured among big museum.Things to rare for expensive, because of this, stone iron meteorite commercial value is very high, even if it is a big collection home, can collect stone iron meteorite is also very few.

天外來物——鐵隕石

鐵隕石

鐵隕石中Ni含量約6~14%,具有由鐵紋石和鎳紋石片晶構成的圖像,這種圖像稱為 維斯臺登構造。80%以上的鐵隕石都具有這種圖像,鐵紋石和鎳紋石片晶呈八面體排列的鐵隕石,命名為八面體鐵隕石。 Ni含量約低於6%的鐵隕石,沒有維斯臺登構造,主要是大的鐵紋石單晶體,這些鐵隕石具六面體解理,稱為六面體鐵隕石。 當Ni含量約超過14%時,細粒八面體鐵隕石的維斯臺登構造消失,只能見到細粒鐵紋石和鎳紋石呈角礫斑雜狀的交生現象。 當Ni含量達25~65%時,形成無結構的鐵隕石,這種隕石主要由鎳紋石組成,含有一些小的鐵紋石包體和少許其他的礦物。大多數鐵隕石都顯示衝擊效應的特徵。Iron meteorites, which contain about 6 to 14 percent Ni, have an image of iron-striated stone and nickel-striated stone flakes, known as the vestenden structure.More than 80 percent of iron meteorites have this image. Iron meteorites with an octahedral arrangement of iron and nickel flakes are called iron octahedral meteorites.Iron meteorites with Ni content of about less than 6% do not have westenden structure, mainly large iron striated stone single crystal, these iron meteorites have hexahedral cleavage, called hexahedral iron meteorites.When the content of Ni was more than 14%, the weissenden structure of fine-grained octahedral iron meteorite disappeared, and only the intergrowth phenomenon of fine-grained iron-striated stone and nickel-striated stone was seen.When Ni content reaches 25 ~ 65%, unstructured iron meteorites are formed. This meteorite is mainly composed of nickel striated stone, containing some small iron striated stone inclusions and a few other minerals.Most iron meteorites are characterized by impact effects.

天外來物——鐵隕石

鐵隕石

此鐵隕石內部含有大量稀有礦物質,無論從重量還是歷史價值和科研價值來說都是稀有的,升值潛力無限,值得收藏。因為隕石與地球岩石非常相似,所以一般較難辨別,所以找到隕石的概率非常非常小,即使是有經驗的隕石獵人,也可能要好幾年才能發現一枚隕石,就顯得彌足珍貴。該鐵隕石含多種金屬礦物質,極為稀有,價值十分可觀,非常適合投資和收藏。This iron meteorite contains a large number of rare minerals, whether from the weight or historical value and scientific value are rare, appreciation potential unlimited, worth collecting.Because meteorites and earth rocks are very similar, so generally difficult to identify, so the probability of finding a meteorite is very, very small, even experienced meteorite hunters, it may take several years to find a meteorite, it is very precious.The iron meteorite contains a variety of metallic minerals, very rare, very considerable value, very suitable for investment and collection.




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