藏西南札达白垩纪Albian期海绿石的矿物学特征及地质意义

被引:14
作者
李响 [1 ,2 ]
蔡元峰 [1 ,2 ]
胡修棉 [1 ,2 ]
黄志诚 [1 ,2 ]
王建刚 [1 ,2 ]
耿建华 [1 ,2 ]
机构
[1] 南京大学内生金属矿床成矿机制研究国家重点实验室
[2] 南京大学地球科学与工程学院
关键词
海绿石; 矿物学特征; 夏拉剖面; 西藏札达;
D O I
10.16509/j.georeview.2011.01.008
中图分类号
P574 [矿物的物理化学];
学科分类号
070901 ;
摘要
海绿石是海相沉积的指相矿物,通常形成于海进系列,与低的沉积物供应速率有关。本文利用岩相和扫描电子显微镜(SEM)对样品进行了详细的观察,并运用X射线粉晶衍射(XRD)、傅立叶变换红外吸收光谱(FTIR)、电子探针微分析(EPMA)等技术,对藏西南札达县波林地区夏拉剖面中的海绿石砂岩和含海绿石灰岩样品进行了系统的分析与研究。上述分析表明砂岩和灰岩中的海绿石均为高演化的海绿石,砂岩中的海绿石为原地海绿石,而灰岩中的海绿石则源于下伏砂岩。通过沉积环境分析和区域地层对比,笔者等认为札达地区砂岩中海绿石的出现可能与Albian晚期印度大陆从澳大利亚—南极大陆的彻底裂解而造成的该地区的海进有关。持续的海进过程导致了该地区高演化的海绿石的形成。
引用
收藏
页码:63 / 72
页数:10
相关论文
共 20 条
[11]  
M?ssbauer characteristics of glauconitisation[J] . E. Kuzmann,T. G. Weiszburg,E. Tóth,V. K. Garg.Hyperfine Interactions . 2008 (1)
[12]  
Interpretation of authigenic vs. allogenic green peloids of ferric clay in the Proterozoic Penganga Group, southern India[J] . P. C. Bandopadhyay.Clay Minerals . 2007 (4)
[13]  
Late Cretaceous transgression on a Cimmerian high (Neka Valley, Eastern Alborz, Iran): A geodynamic event recorded by glauconitic sands[J] . Fabrizio Berra,Andrea Zanchi,Massimo Mattei,Amir Nawab.Sedimentary Geology . 2007 (3)
[14]  
Syndepositional shallow-water precipitation of glauconitic minerals[J] . H.S Chafetz,A Reid.Sedimentary Geology . 2000 (1)
[15]  
The genesis of glaucony in the Oligo–Miocene Torquay Group, southeastern Australia: petrographic and geochemical evidence[J] . Jonathan C Kelly,John A Webb.Sedimentary Geology . 1999 (1)
[16]  
Detecting compositional, spatial, and temporal attributes of glaucony: a tool for provenance research[J] . Alessandro Amorosi.Sedimentary Geology . 1997 (1)
[17]  
Palaeomagnetism of Cretaceous to Tertiary sediments from southern Tibet: evidence for the extent of the northern margin of India prior to the collision with Eurasia[J] . A. Patzelt,Huamei Li,Junda Wang,E. Appel.Tectonophysics . 1996 (4)
[18]  
The process of glauconitization: chemical and isotopic evidence[J] . Peter Stille,Norbert Clauer.Contributions to Mineralogy and Petrology . 1994 (3)
[19]  
Sea-Level Change:An IntegratedApproach. Baum G R,Vail P R. . 1988
[20]  
Early Cretaceous strata of the Nepal Himalayas: conjugate margins and rift volcanism during Gondwana breakup. Gibling M.R,Gradstein F.M,Kristiansen I.L. et al. The Journal of Geology . 1994