地幔岩包体中的Ni，Fe，Au，Mo含量及其意义--以山东和辽宁地区的比较分析为例  

Ni,Fe,Au,Mo contents of mantle-derived rocks and its implications:from comparative analysis to mantle-derived rocks of Liaoning and Shandong

作　　者：张维萍[1] 赫英[1] 岳可芬[1] 董振信[2] 

机构地区：[1]西北大学大陆动力学国家重点实验室/地质学系 [2]中国地质博物馆,北京100812

出　　处：《西北大学学报（自然科学版）》2008年第1期107-111,共5页Journal of Northwest University（Natural Science Edition）

基　　金：国家自然科学基金(40372052);陕西省自然科学基金(2002B307);陕西省教育厅基金(02JK063)

摘　　要：目的探讨华北南北两缘辽宁宽甸及山东临朐两地新生代地幔岩包体中成矿元素含量与矿床分布之间的关系。方法利用地幔岩包体常量元素、微量元素和稀土元素地球化学分析,结合区域矿产类型及矿产分布进行研究。结果辽宁宽甸岩石圈地幔经历了较高程度的部分熔融,后期交代作用较之山东临朐较弱;山东临胸部分熔融程度较之辽宁宽甸较低,进行的交代作用较强。辽宁宽甸的地幔岩包体成矿元素Ni,Fe,Au及Mo平均值分别为2561×10^(-6)g/g,7.07%,4.17×10^(-9)g/g,0.19×10^(-6)g/g;山东临朐的地幔岩包体的成矿元素Ni,Fe,Au及Mo平均值分别为1967×10^(-6)g/g,6.60%,10.7×10^(-9)g/g,0.37×10^(-6)g/g。中国华北地块南北两缘地幔岩包体中的成矿元素Ni,Fe含量明显表现为北缘高南缘低,而Au,Mo含量则为南缘高北缘低。结论岩石圈地幔岩Ni,Fe,Au,Mo等成矿元素含量的高低与成矿省情况基本是耦合的。地幔岩包体中Ni,Fe,Au,Mo等含量的高低对地壳矿产分布有指示意义。Aim To study the rolations between forming elements contents of mantle-derived xenoliths with the distributions of concentrated districts. Methods The analysis of geochemistry data about the major, trace and rare elements of mantle-derived xenoliths combined with the mineral kinds and the distribution of mineral products. Resuits Liaoning＇s lithosphere mantle occurred in higher partial melt than Shandong＇ s, but Liaoning＇ s lithosphere mantle occurred in lower metasomatosis than Shandong＇s. The Ni, Fe, Au, Mo contents of mantle-derived xenoliths from Liaoning Province are in the range of 1831 -2678 × 10 ^-6g/g, 6. 59 ×7.98% , 1.8 -5. 1× 10^-9g/g, 0. 15 -0.28×10^-6g/g, averaging 2172 ×10^-6g/g,7.07% , 3.77 × 10^-9g g/g, 0. 20 ×10^-6g/g. The Ni, Fe, Au, Mo contents of mantle-derived xenoliths from Shandong Province are in the range of 1132 - 2554×10^-6g/g, 6. 07 - 7.66% ,4. 8-21.0 × 10^-9g/g, 0. 25-0. 48 × 10^-6g/g, averaging 1745 × 10^-6g/g,6. 60%, 10. 04× 10^-9g/g, 0. 38 × 10^-6g/g. The mantle-derived xenoliths from Liaoning Province have higher Ni, Fe contents than mantle-derived xenoliths from Shandong Province, but the mantle-derived xenoliths from Liaoning Province have lower Au, Mo contents than mantle-derived xenoliths from Shandong Province. Conclusion The contents of Ni, Fe, Au, Mo of the samples mantle-derived xenoliths from southern margin and northern margin of Northern China （ Linqu of Shandong Province and Kuandian of Liaoning Province） are coupled with the basic metallogenic Provinces. It is considered that the Ni, Fe, Au, Mo contents of mantle-derived xenoliths may be indicators to the distributions of concentrated districts in the crust.

关 键 词：华北地台 橄榄岩包体 地球化学 Ni Fe Au Mo含量 

分 类 号：P597[天文地球—地球化学]