本文選題：橄欖石　切入點(diǎn)：電導(dǎo)率　出處：《中國科學(xué):地球科學(xué)》2017年05期

【摘要】：高溫高壓電導(dǎo)率實(shí)驗(yàn)研究是透視地球內(nèi)部結(jié)構(gòu)與物質(zhì)組成的一個(gè)重要窗口.百年來進(jìn)行了大量地幔礦物電導(dǎo)率的研究,但對(duì)地幔巖石的研究卻不足;進(jìn)行了壓力對(duì)地幔礦物電導(dǎo)率影響的研究,但獲得的激活體積值卻有正有負(fù);進(jìn)行了含水橄欖石電導(dǎo)率的測量,但仍存在干濕軟流圈地幔之爭;進(jìn)行了部分熔融巖石電導(dǎo)率的研究,但對(duì)異常高導(dǎo)成因的解釋卻仍沒有定論.因?yàn)樵撗芯繉?duì)人們認(rèn)識(shí)地幔的物質(zhì)組成和礦物相變,地幔的電性結(jié)構(gòu)和熱結(jié)構(gòu),以及洋殼俯沖和高導(dǎo)異常成因等地幔動(dòng)力學(xué)問題有重大意義,因此,還需繼續(xù)研究地幔巖石、礦物的電導(dǎo)率與溫度、壓力、氧逸度和組分等之間的關(guān)系,再結(jié)合地球物理的探測結(jié)果,構(gòu)建合理的電導(dǎo)率-深度剖面圖.
[Abstract]:Experimental study of high temperature and high pressure conductivity is an important perspective window inside the earth structure and material composition. One hundred years has done much research on the electrical conductivity of mantle minerals, but the study of mantle rocks is inadequate; studied the influence of pressure on the electrical conductivity of mantle minerals, but the activation volume has both positive and negative values are; the measurement of water conductivity of olivine, but there are still wet asthenospheric mantle dispute; studied part of molten rock conductivity, but to explain the causes of abnormal high conductivity is still inconclusive. Because the study of material composition and mineral phase change people's understanding of the mantle, the electrical structure and thermal structure of the mantle, there is the significance, problems and the subduction of oceanic crust and high conductivity anomaly and mantle dynamics therefore also need to continue to study the mantle rocks, conductivity and temperature, the mineral pressure between the oxygen fugacity and composition The relationship and the results of geophysical exploration are combined to build a reasonable conductivity depth profile.

【作者單位】： 中國科學(xué)院地質(zhì)與地球物理研究所中國科學(xué)院地球與行星物理重點(diǎn)實(shí)驗(yàn)室;
【基金】：國家自然科學(xué)基金項(xiàng)目(批準(zhǔn)號(hào):41174074和41574089)資助
【分類號(hào)】：P542.5

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本文編號(hào)：1670986