海洋地质前沿2018，Vol.34Issue(2)：10-15,6.DOI:10.16028/j.1009-2722.2018.02002
澳大利亚西南部风成砂屑灰岩的分布、形态和时代特征
DISTRIBUTION, MORPHOLOGY AND CHRONOLOGY OF THE AEOLIAN CALCARENITES IN SOUTHWESTERN AUSTRALIA
摘要
Abstract
A spectacular landform of pinnacle karst occurs in the southwestern coast of Western Australia.It consists of thousands of pinnacles up to 5 m high,and 2 m wide and only 0.5-5 m apart,particularly well exposed in the Nambung National Park.The pinnacles are formed in the Pleistocene Tamala Limestone,which comprises of cyclic sequences of aeolian calcarenite,calcrete,microbialite and palaeosol.The morphology of the pinnacles varies with the lithology in which they are formed,for examples,typically conical in aeolianite and cylindrical in microbialite.However,the Nambung pinnacles is mainly influenced by joints and fractures.The extensive dissolution associated with pinnacle formation at Nambung resulted in a large amount of insoluble quartz residues,which are redeposited and even bury the pinnacles sometimes.This period of karstification occurred at around 70,000 years before present,and there was an earlier but weaker stage of pinnacle development during the period 34-38 million years ago.关键词
风成砂屑灰岩/砂丘/石峰/风成岩溶作用/澳大利亚西南部Key words
aeoliancalcarenites/dune/pinnacle/aeolian kanstification/Southwestern Australia分类
天文与地球科学引用本文复制引用
张威威,许红,杨少春,史同强,纳琴,陶萌,季兆鹏..澳大利亚西南部风成砂屑灰岩的分布、形态和时代特征[J].海洋地质前沿,2018,34(2):10-15,6.基金项目
国家科技基础资源调查专项(2017FY201407) （2017FY201407）
国家重点基础研究发展计划(973计划)(2012CB956004) （973计划）
国家自然科学基金(41106064) （41106064）
