大别山造山带高压-超高压变质岩的折返过程

被引：19

作者：

王清晨

机构：

[1] 中国科学院地质与地球物理研究所,岩石圈演化国家重点实验室

来源：

岩石学报 | 2013年 / 29卷 / 05期

关键词：

折返; 高压-超高压变质岩; 大别山造山带;

D O I：

暂无

中图分类号：

P588.3 [变质岩];

学科分类号：

070901 ;

摘要：

高压-超高压变质岩的形成与折返是地球动力学过程,虽人眼不能见及,但在岩石中留下种种记录。本文以大别山为例对高压-超高压变质岩的折返过程进行了探讨。文中(1)综合构造地质学和地球物理学观测资料,剖析了大别山造山带的结构构造,指出了作为高压-超高压变质岩折返通道的莫霍面断口和折返形成的挤压穹隆地壳结构;(2)综合变质岩石学P-T-t轨迹研究资料,追踪高压-超高压变质岩在地下的运动轨迹,揭示了其在俯冲-折返过程不同时段经过的深度和运动速率,并指出其向南的折返极性;(3)结合沉积岩石学研究资料,利用合肥盆地中砾岩成分和碎屑白云母Si含量记录,限定了高压-超高压变质岩折返至地表的时间为中侏罗世前。基于上述资料,本文重建了大别山高压-超高压变质岩的三阶段折返过程,指出大别山包含三个岩片,于230Ma左右分别从不同深度快速折返,折返速率为3～10km/Ma,于210Ma左右进入中地壳,并于180Ma左右快速折返(折返速率为3km/Ma左右)至上地壳,白垩纪折返速率极慢(0.1km/Ma左右)。

引用

页码：1607 / 1620

页数：14

共 39 条

[11]

安徽北部中新生代沉积盆地分析[M]. 地质出版社 , 韩树〓等著, 1996

[12]

Exhumation of the Dabie UHP Terrane, China[J] . Wang Qingchen,Shi Yonghong,Lin Wei,Guo Jinghui.International Geology Review . 2008 (1)

[13]

Low-T eclogite in the Dabie terrane of China: petrological and isotopic constraints on fluid activity and radiometric dating[J] . Xu-Ping Li,Yong-Fei Zheng,Yuan-Bao Wu,Fukun Chen,Bing Gong,Yi-Liang Li.Contributions to Mineralogy and Petrology . 2004 (4)

[14]

A coherent lithostratigraphic unit in the coesite–eclogite complex of Dabie Shan, China: geologic and petrologic evidence[J] . Franco Rolfo,Roberto Compagnoni,Weiping Wu,Shutong Xu.LITHOS . 2004 (1)

[15]

Eclogites preserved as pebbles in Jurassic conglomerate, Dabie Mountains, China[J] . Qingchen Wang,Renwei Li,Daoxuan Wang,Shuangying Li.LITHOS . 2003 (3)

[16]

Continental subduction and exhumation of UHP rocks. Structural and geochronological insights from the Dabieshan (East China)[J] . LITHOS . 2003 (3)

[17]

Carboniferous and Triassic eclogites in the western Dabie Mountains, east‐central China: evidence for protracted convergence of the North and South China Blocks[J] . WeidongSun,I. S.Williams,ShuguangLi.Journal of Metamorphic Geology . 2002 (9)

[18]

Constraints on timing of peak and retrograde metamorphism in the Dabie Shan Ultrahigh-Pressure Metamorphic Belt, east-central China, using U–Th–Pb dating of zircon and monazite[J] . John C Ayers,Stacie Dunkle,Shan Gao,Calvin F Miller.Chemical Geology . 2002 (3)

[19]

First report of felsic whiteschist in the ultrahigh-pressure metamorphic belt of Dabie Shan, China[J] . Franco Rolfo,Roberto Compagnoni,Shutong Xu,Laili Jiang.European Journal of Mineralogy . 2000 (4)

[20]

High-pressure blueschists and eclogites in Hong'an: a framework for addressing the evolution of high- and ultrahigh-pressure rocks in central China[J] . Elizabeth A Eide,Juhn G Liou.LITHOS . 2000 (1)

← 1 2 3 4 →