新疆“木吉火山群”的属性与特征
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1.中国科学院地质与地球物理研究所新生代地质与环境院重点实验室;2.河北地质大学地球科学学院;3.江西科技师范大学

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国家自然科学基金项目(42272349,41962012)、中国博士后科学基金项目资助(2021M703196)


The attributes and characteristics of "Muji volcano group" in Xinjiang
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1.Key Laboratory of Cenozoic Geology and Environment,Institute of Geology and Geophysics,Chinese Academy of Sciences;2.College of Earth Sciences,Hebei GEO University;3.Jiangxi Normal University of Science and Technology

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    摘要:

    本文是首次对“木吉火山群”综合地质调查研究结果的展示。在对该“火山群”进行全面深入野外调查和系统分析研究的基础上,笔者提出了“热火山”和“冷火山”的新概念,将泥火山和“木吉火山群”纳入“冷火山”。“木吉火山群”沿木吉河谷分布,至少有63个大小不等的“火山锥”,其中锥底直径>50 m,锥高>5 m的有13个。锥顶多具“火山口”,口中多有积水。锥体主要由石灰岩组成,“火山口”水化学分析显示Ca2+、HCO3-含量高,这都与围岩中富含碳酸盐岩石相呼应。这些“火山锥”主要由木吉河谷地下水、泉水和流水溶蚀碳酸盐,喷出地表,再沉积而成。它们似火山,却不是传统意义上的火山,也不同于一般的泥火山,应属于钙质泉华型“冷火山”。

    Abstract:

    This paper presents the inaugural findings from a comprehensive geological survey of the 'Muji volcano group'. Through extensive and thorough field investigations, coupled with a systematic analysis of the 'volcano group', the author introduces innovative concepts such as 'hot volcano' and 'cold volcano'. The classification incorporates mud volcanoes, categorizing the 'Muji volcano group' as a 'cold volcano'. The distribution of the 'Muji volcano group' spans the Muji River Valley, featuring a minimum of 63 volcanic cones of various sizes. Among these, 13 cones boast a base diameter exceeding 50 m and a cone height surpassing 5 m. The cones exhibit numerous craters at their summits, often containing substantial water. Primarily composed of limestone, the 'crater' hydrochemical analysis reveals elevated levels of Ca2+ and HCO3-, aligning with the abundant carbonate rock in the surrounding area. These volcanic cones primarily result from the dissolution of carbonates by groundwater, spring water, and running water in the Muji River Valley. The expelled materials deposit on the surface, forming structures akin to volcanoes. Despite their outward resemblance, these formations deviate from traditional volcanoes and differ from typical mud volcanoes. Accordingly, they are classified as calcareous spring-type 'cold volcanoes'.

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  • 收稿日期:2024-04-30
  • 最后修改日期:2024-05-09
  • 录用日期:2024-05-09
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