收稿日期: 2000-08-15
修回日期: 2000-10-12
网络出版日期: 2001-04-01
基金资助
俄罗斯基础研究基金(96-05-00026C,98-05-64462);中国国家自然科学基金(编号:49811120724);国土资源部重点科技项目(编号:951102)和中国国家外国专家局专项(编号:T990423011)等项目共同资助.
PETROLOGY OF THE MAKSYUTOV ECLOGITE-BLUESCHIST COMPLEX,SOUTHERN URALS
Received date: 2000-08-15
Revised date: 2000-10-12
Online published: 2001-04-01
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1 060～686℃ ,压力为22.3×105～14.16×105k Pa;PT轨迹具岩浆(榴辉岩浆)自上地幔向下地壳上侵的特点。
A.A.Marakushev, A.V.Bobrov, V.G.Butvina, 桑隆康,刘嵘 . 南乌拉尔玛克苏托夫榴辉岩蓝片岩杂岩体的岩石学[J]. 地球科学进展, 2001 , 16(2) : 147 -152 . DOI: 10.11867/j.issn.1001-8166.2001.02.0147
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=22.3×105~14.16×105 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.
Key words： Eclogite; Blueschist; Petrology; Mineralogy; Maksyutov complex; Asia.
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