全部 标题 作者
关键词 摘要

OALib Journal期刊
ISSN: 2333-9721
费用:99美元

查看量下载量

相关文章

更多...
地质通报  2007 

柴达木盆地北缘锡铁山副片麻岩所记录的多期构造热事件

, PP. 631-638

Keywords: 柴达木盆地北缘,锡铁山,副片麻岩,锆石SHRIMPU-Pb定年,多期构造热事件

Full-Text   Cite this paper   Add to My Lib

Abstract:

在柴达木盆地北缘中段的锡铁山地区,夹有榴辉岩或退变榴辉岩透镜体的2个副片麻岩样品的锆石被用于SHRIMPU-Pb测定。2个片麻岩样品具有类似的特征,主要由石榴子石、夕线石、长石、黑云母和石英组成,这些矿物组合形成的变质条件为0.6~0.9GPa和710~820℃,显示两处片麻岩经历了中压麻粒岩相条件的变质作用。锆石的SHRIMPU-Pb测定显示,2个样品均获得近一致的早古生代变质年龄(分别为437Ma±6Ma和441Ma±15Ma),代表早古生代的高温变质作用时代。样品XTS-1还获得890Ma±14Ma的年龄,所测定的锆石具有明显的变质作用成因特征,代表了新元古代早期的变质事件,反映了这些副片麻岩在早古生代造山旋回之前可能还经历了晋宁期的变质作用。

References

[1]  青海省地质矿产局.青海省区域地质志[M].北京:地质出版社,1991.
[2]  杨建军,朱红,邓晋福,等.柴达木北缘石榴子石橄榄岩的发现及其意义[J].岩石矿物学杂志,1994,13(2):97-104.
[3]  杨经绥,许志琴,李海兵,等.柴北缘地区榴辉岩的发现及潜在的地质意义[J].科学通报,1998,43(14):1544-1549.
[4]  杨经绥,许志琴,宋述光,等.青海都兰地区榴辉岩的发现及对中国中央造山带高压-超高压变质带研究的意义[J].地质学报,2000,74(2):156-168.
[5]  Zhang J,Xu Z,Yang J,et al.The Altun-northern Qaidam eclogite belt in western China-another HP-UHP metamorphic belt truncated by large scale strike-slip fault in China[J].Earth Science Frontiers,2000,7(Suppl):254-255.
[6]  张雪亭,吕惠庆,陈正兴,等.柴北缘造山带沙柳河地区榴辉岩相高压变质岩石的发现及初步研究[J].青海地质,1999,(2):1-12.
[7]  张建新,杨经绥,许志琴,等.柴北缘榴辉岩的峰期和退变质年龄:来自U-Pb及Ar-Ar同位素测定的证据[J].地球化学,2000,29(3):217-222.
[8]  杨经绥,宋述光,许志琴,等.柴达木盆地北缘早古生代高压-超高压变质带中发现典型超高压矿物--柯石英[J].地质学报,2001,75(2):175-179.
[9]  Song S G,Yang J S,Xu Z Q,et al.Metamorphic evolution of the coesite-bearing ultrahigh-pressure terrane in the north Qaidam,northern Tibet,NW China[J].Journal of Metamorphic Geology,2003,21:631-644.
[10]  Song S G,Zhang L F,Niu Y,et al.Geochronology of diamond-bearing zircons from garnet peridotite in the North Qaidam UHPM belt,Northern Tibetan Plateau:A record of complex histories from oceanic lithosphere subduction to conti nental collision[J].Earth and Planetary Science Letters,2005,234:99-118.
[11]  Zhang J X,Yang J S,Mattinson C G,et al.Two contrasting eclogite cooling histories,North Qaidam HP/UHP terrane,western China:petrological and isotopic constraints[J].Lithos,2005,84:51-76.
[12]  Zhang J X,Yang J S,Meng F C,et al.U-Pb isotopic studies of eclogites and their host gneisses in the Xitieshan area of the North Qaidam Mountains,western China:New evidence for an early Paleozoic HP-UHP metamorphic belt[J].Journal of Asian Earth Sciences,2006,28:143-150.
[13]  张建新,孟繁聪,杨经绥.柴北缘西段榴辉岩相的变质泥质岩:榴辉岩与围岩"原地"关系的证据[J].中国科学(D辑),2004,34(9):825-834.
[14]  张建新,万渝生,孟繁聪,等.柴北缘夹榴辉岩的片麻岩(片岩)地球化学、Sm-Nd和U-Pb同位素研究--深俯冲的前寒武纪变质基底[J].岩石学报,2003,19(3):443-451.
[15]  Kretz R.Symbols for rock-forming minerals[J].Am.Mineral.,1983,68:277-279.
[16]  Ferry J M,Spear F S.Experimental calibration of the partitioning of Fe and Mg between biotite and garnet[J].Contributions to Mineralogy and Petrology,1978,66:113-117.
[17]  Holdaway M J.Stability of andalusite and the aluminium silicate phase diagram[J].American Journal of Science,1971,271:214-220.
[18]  Black L P,Kamo S L,Aleinikoff J,et al.TEMORA 1:a new zircon standard for Phanerozoic U-Pb geochronology[J].Chemical Geology,2003,200:155-170.
[19]  Zhang J X,Mattinson C G,Meng F C,et al.An early Paleozoic HP/HT granulite-garnet peridotite association in the south Altyn Tagh,NW China:p-T history and U-Pb geochronology[J].Journal of metamorphic Geology,2005,23:491-510.
[20]  Wan Y S,Yang J S,Xu Z Q,et al.Geochemical Characteristics of the Maxianshan complex and Xinglongshan Group in the eastern segment of the Qilian orogenic belt[J].Journal of the Geological Society of China,2000,43(1):52-68.
[21]  陆松年.青藏高原北部前寒武纪地质初探[M].北京:地质出版社,2002:1-125.
[22]  Wan Y S,Zhang J X,Yang J S,et al.Geochemistry of high-grade metamorphic rocks of the North Qaidam Mountains and their geological significance[J].Journal of Asian Earth Sciences,28:174-184.
[23]  Smith A D,Wen D J,Huang L Y,et al.Constraints from gneisses in the Qilian fold belt for the position of the North China block in the Proterozoic[J].Journal of the Geological Society of China,2000,43(1):81-93.

Full-Text

Contact Us

service@oalib.com

QQ:3279437679

WhatsApp +8615387084133