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雪玉洞母岩沉积地质特征及其对次生沉积物的影响

雷佳琪 伍坤宇 由 超 姜雪萌 王 鹏 蒋勇军

雷佳琪, 伍坤宇, 由 超, 姜雪萌, 王 鹏, 蒋勇军. 雪玉洞母岩沉积地质特征及其对次生沉积物的影响[J]. 中国岩溶, 2017, 36(3): 296-305. doi: 10.11932/karst20170302
引用本文: 雷佳琪, 伍坤宇, 由 超, 姜雪萌, 王 鹏, 蒋勇军. 雪玉洞母岩沉积地质特征及其对次生沉积物的影响[J]. 中国岩溶, 2017, 36(3): 296-305. doi: 10.11932/karst20170302
LEI Jiaqi, WU Kunyu, YOU Chao, JIANG Xuemeng, WANG Peng, JIANG Yongjun. Characteristics of sedimentary geology of parent rock at the Xueyudong Cave and its impact on secondary sediments [J]. CARSOLOGICA SINICA, 2017, 36(3): 296-305. doi: 10.11932/karst20170302
Citation: LEI Jiaqi, WU Kunyu, YOU Chao, JIANG Xuemeng, WANG Peng, JIANG Yongjun. Characteristics of sedimentary geology of parent rock at the Xueyudong Cave and its impact on secondary sediments [J]. CARSOLOGICA SINICA, 2017, 36(3): 296-305. doi: 10.11932/karst20170302

雪玉洞母岩沉积地质特征及其对次生沉积物的影响

doi: 10.11932/karst20170302
基金项目: 喀斯特槽谷区土地石漠化过程及综合治理技术研发与示范(2016YFC0502300)

Characteristics of sedimentary geology of parent rock at the Xueyudong Cave and its impact on secondary sediments 

  • 摘要: 为了研究洞穴母岩对洞穴系统及次生沉积物产生的影响,以重庆丰都雪玉洞母岩为研究对象,对其沉积地质特征进行了详细的研究,同时还探讨母岩的沉积地质特征与洞穴发育及次生沉积物特征之间的关联。结果表明,雪玉洞的母岩层位为下三叠统飞仙关组第二段,其沉积相为颗粒滩。母岩的岩性为砂屑灰岩、鲕粒灰岩、砾屑灰岩, 夹少量微晶灰岩。母岩和洞穴次生沉积物的主要矿物成分是低镁方解石(LMC, low magnesium calcite)。母岩较低的Mg/Ca导致洞穴滴水的Mg/Ca也较低,这使得组成次生沉积物的低镁方解石晶体快速侧向生长,并导致方解石晶体纯净、粗大且自形程度高。雪玉洞母岩顶底板岩层沉积期稳定的滩间海沉积环境有助于形成高强度的厚层微晶灰岩从而为洞穴系统的发育提供有效的支撑。这表明洞穴母岩的沉积地质特征会在物质基础的层面对洞穴系统的发育以及洞穴次生沉积物的特征产生显著影响。

     

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  • 发布日期:  2017-06-25

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