印度中央邦singruli地区Makrohar麻粒岩带Tiyara地区基性麻粒岩的变质演化

IF 1.1 4区综合性期刊 Q3 MULTIDISCIPLINARY SCIENCES Current Science Pub Date : 2022-12-10 DOI:10.18520/cs/v123/i11/1334-1340

Vikas Pandey, S. B. Dwivedi

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引用次数: 2

摘要

从岩石学、矿物化学和变质压力-温度(P-T)条件等方面，研究了长塔那格布尔花岗片麻岩杂岩(CGGC)中Makrohar麻粒岩带的基性麻粒岩。在不同薄片上观察到的常见矿物组合为正辉石-斜辉石-角闪石-斜长石-黑云母-石英。研究区基性麻粒岩的平均P-T条件表明，变质作用的峰值为799°±40°C/6.3±0.9 kbar。然而，在固定压力为6 kbar的条件下，常规双辉石温计测得的P-T峰值为5.83-6.47 kbar和887°±62°C，其次是变质作用在590°-693°C/ 2.1-2.4 kbar的峰后P-T条件。

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Metamorphic evolution of mafic granulites from Tiyara area, Makrohar granulite belt, Singrauli district, Madhya Pradesh, India

The mafic granulite rocks f rom the Makrohar Granulite Belt of the Chotanagpur Granite Gneissic complex (CGGC) have been studied with reference to their petrography, mineral chemistry and pressure–temperature ( P–T ) conditions of metamorphism. The common mineral assemblage observed within different thin sections is orthopyroxene–clinopyroxene–hornblende–plagioclase– biotite–quartz. The average P–T condition of the mafic granulites in the study area suggests a peak of metamorphism at 799 ° ± 40 ° C/6.3 ± 0.9 kbar. However, the peak P–T estimate obtained from the conventional two-pyroxene thermobarometer is 5.83–6.47 kbar and 887 ° ± 62 ° C at a fixed pressure of 6 kbar, followed by post-peak P–T conditions of metamorphism at 590 ° –693 ° C/ 2.1–2.4 kbar.

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来源期刊

Current Science 综合性期刊-综合性期刊

CiteScore

1.50

自引率

10.00%

发文量

审稿时长

3 months

期刊介绍： Current Science, published every fortnight by the Association, in collaboration with the Indian Academy of Sciences, is the leading interdisciplinary science journal from India. It was started in 1932 by the then stalwarts of Indian science such as CV Raman, Birbal Sahni, Meghnad Saha, Martin Foster and S.S. Bhatnagar. In 2011, the journal completed one hundred volumes. The journal is intended as a medium for communication and discussion of important issues that concern science and scientific activities. Besides full length research articles and shorter research communications, the journal publishes review articles, scientific correspondence and commentaries, news and views, comments on recently published research papers, opinions on scientific activity, articles on universities, Indian laboratories and institutions, interviews with scientists, personal information, book reviews, etc. It is also a forum to discuss issues and problems faced by science and scientists and an effective medium of interaction among scientists in the country and abroad. Current Science is read by a large community of scientists and the circulation has been continuously going up. Current Science publishes special sections on diverse and topical themes of interest and this has served as a platform for the scientific fraternity to get their work acknowledged and highlighted. Some of the special sections that have been well received in the recent past include remote sensing, waves and symmetry, seismology in India, nanomaterials, AIDS, Alzheimer''s disease, molecular biology of ageing, cancer, cardiovascular diseases, Indian monsoon, water, transport, and mountain weather forecasting in India, to name a few. Contributions to these special issues ‘which receive widespread attention’ are from leading scientists in India and abroad.