苏联地质学家显然已钻了一口深达10500米的创记录的深井。这口井位于科拉半岛的波罗的地盾,是60年代开钻的。 据苏联地质部长在“Известия”上发表一篇文章中说,苏联地质学家曾希望钻到7000米以下地壳的玄武岩层,但钻探在穿过6800米的沉积岩层之后遇到了花岗岩层,在10500米时钻探仍在花岗岩中进行。 地质学家发现在3000米以下时,地温梯度从每百 Soviet geologists apparently have drilled a record deep well of 10,500 meters. This well was located in the Baltic Shield on the Kola Peninsula and was drilled in the 1960s. According to an article published in “Известия” by the Soviet geology minister, Soviet geologists had hoped to drill into basaltic crust below 7,000 meters, but the drilling met the granite layer after passing through the 6,800 meters of sedimentary rock formation. At 10500 Drilling is still done in granite meters. Geologists found that at temperatures below 3000 meters, geothermal gradients ranged from a hundred