Evaluation of micro-weathering index and weathering grade of diverse geomorphic features of proterozoic terrain applying Schmidt hammer

IF 1.1 4区地球科学 Q4 ENVIRONMENTAL SCIENCES

Physical Geography Pub Date : 2023-05-04 DOI:10.1080/02723646.2022.2082352

Manas Karmakar, Monali Banerjee, Debasish Ghosh

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引用次数: 1

Abstract

ABSTRACT The Upper Subarnarekha Kangsabati Interfluve (USKI) belongs to the eastern margin of CGGC, which is part of East Indian Shield. This Proterozoic (1.72–1.87 Ga) terrain had have experienced intensive weathering processes over the long period under different climatic conditions. A total number of 965 Rebound (R) value were collected from eight geomorphic features located in the USKI. In the present study, an attempt has been made to synthesize the history and variation in intensity of weathering using Schmidt hammer (SH). The degree of weathering is calculated using micro-weathering index, which is formulated on Schmidt hammer R-values, collected from deeply weathered (DW) and relatively less weathered (RLW) rock surfaces. The results of the study revealed the different response of diverse types of rock to the geomorphic processes. The weathering grade of each identified geomorphic features has been computed and the results revealed that seven features belong to moderately weathered (grade III) out of eight identified features. The present study is a unique attempt considering multi-cyclic evolution of CGGC to understand the degree of weathering of these studied features, belonging from USKI. This study helps to understand the weathering grade of studied features in quantitative way.

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应用Schmidt锤评价元古代不同地貌特征的微风化指数和风化等级

Upper Subarnarekha Kangsabati Interfluve (USKI)属于CGGC的东缘，是东印度盾的一部分。该元古代(1.72-1.87 Ga)地形在不同的气候条件下经历了长期剧烈的风化过程。从位于USKI的8个地貌特征中共收集了965个反弹(R)值。在本研究中，我们尝试用施米特锤综合风化的历史和强度变化。利用微风化指数计算风化程度，微风化指数是根据深度风化(DW)和相对较少风化(RLW)岩石表面的施密特锤r值制定的。研究结果揭示了不同类型的岩石对地貌过程的不同反应。计算了各地貌特征的风化等级，结果表明，8个地貌特征中有7个属于中等风化(III级)。本研究是考虑CGGC多旋回演化的独特尝试，旨在了解USKI研究的这些特征的风化程度。该研究有助于定量地了解所研究特征的风化等级。

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来源期刊

Physical Geography 地学-地球科学综合

CiteScore

3.60

自引率

0.00%

发文量

审稿时长

6 months

期刊介绍： Physical Geography disseminates significant research in the environmental sciences, including research that integrates environmental processes and human activities. It publishes original papers devoted to research in climatology, geomorphology, hydrology, biogeography, soil science, human-environment interactions, and research methods in physical geography, and welcomes original contributions on topics at the intersection of two or more of these categories.