地质科学
     首页 | 过刊浏览 |  本刊介绍 |  编委会 |  投稿指南 |  期刊征订 |  留言板 |  批评建议 |  联系我们 |  English
地质科学  1996, Vol. Issue (3): 274-286    DOI:
论文 最新目录 | 下期目录 | 过刊浏览 | 高级检索  |   
西澳大利亚豪特曼群礁复活节岛群全新世珊瑚礁的海底胶结作用
朱井泉1, 祝仲蓉2, L. B. Collins2
1. 中国科学院地质研究所, 北京, 100029;
2. 澳大利亚柯廷理工大学应用地质学院, 珀斯, WAo102
SUBMARINE CEMENTATION OF HULUCENE CURAL REEFS IN EASTER GROUP OF THE HOUTMAN ABROLHOS, WESTERN AUSTRALIA
Zhu Jingquan1, Zhu Zhongrong2, L. B. Collins2
1. Institute of Geology, Chinese Academy of Sciences, Beijing 100029;
2. School of Applied Geology, Curtun University of Technology, Perth, WA 6102, Australia
 全文: PDF (5242 KB)   HTML( )   输出: BibTeX | EndNote (RIS)      背景资料
摘要 对澳大利亚的位于海洋过渡带和高纬度的豪特曼群礁复活节岛群上的全新世珊瑚礁进行了海底胶结作用解剖研究。研究表明,该礁像热带珊瑚礁一样,也经历了相当程度的海底胶结。胶结物包括高镁方解石的和文石的共7种类型。由于所处地理位置和海洋环境条件,使得海底胶结物中强烈贫文石而富镁方解石(分别占4%和96%),造成镁方解石胶结物中的MgCO3的摩尔含量规律性降低(8.47%-14.29%)。特有的生物组合及其竞争,不仅构成了迎风礁和背风礁的显着岩相差异(前者以藻类粘结岩为主,后者以珊瑚骨架岩占优),并导致海底胶结物在背风礁中的发育强度远大于迎风礁这一与热带珊瑚礁海底胶结物恰好相反的分布规律。
服务
把本文推荐给朋友
加入我的书架
加入引用管理器
E-mail Alert
RSS
作者相关文章
朱井泉
祝仲蓉
L. B. Collins
关键词全新世珊瑚礁   海底胶结作用   过渡带位置   胶结物类型   分布模式     
Abstract: Coral reefs in the Houtman Abrolhos, situated on the western continental marlin of Australia, occupy a high latitude (29癝 and 114癊) and transitional position between cool-wager shelf carbonates to the south and more tropical environments to the north.Holocene coral reefs in the Easter Group ramge from 9m duck at the wind-ward to more than 26m at the leeward side. Lithofaeies of the windward and leeward reefs differs obviously. The windward reefs are donunated by coralline algal bindstone, whereas porous branching coral framestone farms a major part of leeward reefs. Petrological study shows that the Holocene coral reefs in the Easter Group have experienced extensive submarine cemcntation. Most of the ccmcntation characteristics are as same as, but some of them do differ from their tropical counterparts. The mmeralogies of the cements are aragonite and Mg-calcite. The types of the cements include micritic, peloidal and bladed Mg-calcite, and acicular,botryoidal, mesh and spherulitic aragonite. They are similar to those observed m tropical reefs. Mg-calcite cements are most important and volumetrically reach 96% of the total cement content. The amounts of aragonite cement are substantially reduced,compared to tropical reefs. Mg-calcite peloids are the most striking constituents.They occur extensively in the inter-and intro-granular skeletal cavities, mostly in the branching Aeropora framework of the leeward reefs. submsrme cementation in the leeward refs is significantly stronger than in the windward reefs, and is different from that iu tropical reefs. Another remarkable feature in the submarine cements is that MgCO3 contents of Mg-calcite cements (8.47-14.29mo1%) are clearly lower than those recorded in tropical reefs All the characteristics of the submarine cementation of Holocene coral reefs in the Easter Group can be reasonahlely explained with the conditions in their transitional position and high latitude.
Key wordsHnfocene coral reefs   Suhmarme cementation   Transitional position types of cements   Distribution pattern   
收稿日期: 1995-06-07;
基金资助:澳大利亚研究会(ARC)基金;中国博士后研究基金
引用本文:   
朱井泉,祝仲蓉,L. B. Collins. 1996, 西澳大利亚豪特曼群礁复活节岛群全新世珊瑚礁的海底胶结作用. 地质科学, (3): 274-286.
Zhu Jingquan,Zhu Zhongrong,L. B. Collins. SUBMARINE CEMENTATION OF HULUCENE CURAL REEFS IN EASTER GROUP OF THE HOUTMAN ABROLHOS, WESTERN AUSTRALIA[J]. Chinese Journal of Geology, 1996, (3): 274-286.
 
没有本文参考文献
没有找到本文相关文献
 
版权所有 © 2009-2017 《地质科学》编辑部
地址:北京9825信箱  邮政编码:100029
电话:010-82998109  010-82998115
京ICP备05029136号-10