| 姚锦梅.深圳大鹏半岛火山和香港火山活动特征对比研究[J].地质与勘探,2022,58(1):148-157 |
| 深圳大鹏半岛火山和香港火山活动特征对比研究 |
| A comparative study on volcanic activity characteristics of Dapeng Peninsula, Shenzhen and Hong Kong |
| 投稿时间：2020-06-15 修订日期：2020-08-20 |
| DOI：10.12134/j.dzykt.2022.01.014 |
| 中文关键词: 火山活动带 构造背景 火山地层 火山活动性 对比研究 大鹏半岛 深圳 香港 |
| 英文关键词: volcanic active belt, tectonic background, volcanic stratum, volcanic activity, comparative study, Dapeng Peninsula, Shenzhen, Hong Kong |
| 基金项目:广东省深圳市地质局地质工程院士工作站专项经费项目(编号：2013B090400025)资助 |
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| 中文摘要: |
| 深圳大鹏半岛和香港地区古火山活动带，分布于广东省东部火山活动亚带莲花山火山喷发带上，属于浙闽粤港火山活动带，也是环太平洋火山活动带的一部分。为研究两地火山岩的成因机制、构造演化过程以及两地火山活动的异同点，本文采用实地考察、同位素测年等方法，从火山地层、构造和火山活动性等方面，对大鹏半岛与香港火山活动特征异同点进行对比研究。研究发现两地火山具有相似的沉积环境、相同区域地质构造背景，经历了相似的地质演化过程，火山活动时期也基本相同。二者的不同之处是地貌特征和地质景观不同，各具特色。香港的火山机构存在超级破火山口，六边形柱状节理普遍发育。大鹏半岛火山以火山穹丘为特征，典型火山地质现象是球粒、石泡、流纹、火山碎屑较为发育。根据同位素测年分析，大鹏半岛火山岩同位素年龄值为137~146 Ma，为侏罗纪晚期至白垩纪早期的产物。 |
| 英文摘要: |
| The ancient volcanoes of Dapeng Peninsula, Shenzhen and Hong Kong are located in the eruption zone of the Lianhuashan Volcano, a sub-zone of volcanic activity in eastern Guangdong Province. It belongs to the volcanic belt of Zhejiang, Fujian and Guangdong, is also a part of the circum-Pacific volcanic belt. The purpose of this work is to explore the genetic mechanism, tectonic evolution and the similarities and differences of volcanic activities in these two places. Based on field investigations and isotope dating, we make a comparative study on the similarities and differences of volcanic activity characteristics between the Dapeng peninsula and Hong Kong from the aspects of volcanic strata, structure and activity. Research suggests that the volcanoes of these two places have similar sedimentary environments, same regional geological structure background, similar geological evolution processes, and roughly same volcanic activity periods. The differences between the two places are in the geomorphologic features and geological landscapes, each has its distinct characteristics. There is a supercaldera in the volcanic structure of Hong Kong, where the hexagonal columnar joints widely developed. The Dapeng Peninsula volcano is characterized by volcanic domes, with typical volcanic geological phenomena of pellet, rock bubble, rhyolite and pyroclastic. According to isotopic dating, the age of volcanic rocks in Dapeng Peninsula is 137~146 Ma, which is the product of late Jurassic to early Cretaceous. |
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