南乌拉尔玛克苏托夫榴辉岩蓝片岩杂岩体的岩石学  

PETROLOGY OF THE MAKSYUTOV ECLOGITE- BLUESCHIST COMPLEX, SOUTHERN URALS

作　　者：A.A.Marakushev A.V.Bobrov V.G.Butvina 桑隆康[2] 刘嵘[2] 

机构地区：[1]Department of Petrology [2]中国地质大学地球科学学院,湖北武汉430074

出　　处：《地球科学进展》2001年第2期147-152,共6页Advances in Earth Science

基　　金：俄罗斯基础研究基金! (96 -0 5 -0 0 0 2 6 C;98-0 5 -6 446 2 ) ;中国国家自然科学基金! (编号 :4981112 0 72 4) ;国土资源部重点

摘　　要：玛克苏托夫 (Maksyutov)榴辉岩是乌拉尔—昆仑—祁连—秦岭—大别山元古代褶皱带之一部分。榴辉岩呈团块或布丁夹于片麻岩内 ,由于显生宙与花岗岩侵入有关的退变质叠加影响 ,时代变化自元古代至下古生代。榴辉岩矿物组分恒定但不同程度受绿帘蓝片岩相退变质叠加 ,榴辉岩中石榴石以富铁为主 (f=50 %～ 75% ) ;单斜辉石为绿辉石 Jd40 .3～ 52 .2。据 Krogh石榴子石—单斜辉石温度计 ,榴辉岩形成温度为 1 0 60～ 686℃ ,压力为 2 2 .3× 1 0 5～ 1 4.1 6× 1 0 5k Pa;PT轨迹具岩浆 (榴辉岩浆 )自上地幔向下地壳上侵的特点。The Maksyutov complex is a part of Precambrian foldbelt extending from the Urals,North Karakum,Kunlun,Qilian,Qinling to the Dabie Sulu belt of eastern China. In Maksyutov the eclogites present as single blocks and boudines embedded within the glaucophane and micaceous schists. Due to the Phanerozoic multi phase granite intrusions and their resulting superposed metamorphism the data on the age of eclogite are diverse spanning from Early Proterozoic to Lower Paleozoic. The mineral composition of the eclogite are constant with garnet, omphacite and rutile,however, they are often replaced by metamorphic assemblages of epidote blueschist facies. The garnets are iron rich with f=50%~75%. Clinopyroxenes are omphacites Jd 40.3~52.2. According to the garnet clinopyroxene geothermometry and Jadeite +quartz→albite geobarometry T=1060~686℃,P=22.3×10 5~14.16×10 5 kPa are estimated. The PT trajectory of Maksyutov eclogite corresponds to the upward intrusion of eclogite magma, the final consolidation of the eclogites probably took place in the lower crust.

关 键 词：榴辉岩 蓝片岩 岩石学 矿物学 玛克菌托夫杂岩体 退变质作用 

分 类 号：P588.3[天文地球—岩石学]