印度恰尔肯德邦拉杰马哈尔盆地 Chuperbhita 煤田早二叠世古生物群和大型炭化物的古环境和地层学意义

S. Murthy, Deepa Agnihotri, Prof. Dieter Uhl, Prof. Andre Jasper, Ranjit Kumar Singh
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引用次数: 0

摘要

对印度 Chuperbhita 煤田 Simlong 露天矿(OCM)Barakar 地层上部煤层的化石材料进行了古植物学和大型木炭研究。化石组合显示,非条纹双囊花粉占主导地位,主要是 Scheuringipollenites,条纹双囊花粉次主导,可归入 Faunipollenites,这表明化石时代为早二叠世(阿廷斯基)。大木炭的存在表明,巴拉卡地层沉积于辛隆澳柯玛时曾发生过野火。从古生物组合的成分以及大炭化物的解剖细节来看,源头植被以裸子植物为主。许多木炭碎片的边缘未被磨蚀,这表明木炭没有经过长途运输,说明是当地或区域性火灾造成的。这项研究与之前的大型木炭记录以及印度许多二叠纪煤炭中较高的惰性物质含量一起,进一步证实了在二叠纪早期冈瓦纳大陆的这一地区,古野火作为大陆生态系统的频繁干扰源广泛存在。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Palaeoenvironmental and stratigraphical implications of the palynoflora and macro–charcoal from the early Permian of the Chuperbhita Coalfield, Rajmahal Basin, Jharkhand, India
Palynological and macro–charcoal studies have been carried out on fossiliferous material from the upper seam of the Barakar Formation of Simlong Open Cast Mine (OCM), Chuperbhita Coalfield, India. The palynoassemblage exhibits a dominance of non– striate bisaccate pollen, mainly Scheuringipollenites, and a subdominance of striate bisaccate pollen assignable to Faunipollenites, suggesting an early Permian age (Artinskian). The presence of macro–charcoal indicates the occurrence of wildfire at the time of deposition of the Barakar Formation at Simlong OCM. The composition of the palynological assemblage, as well as anatomical details of the macro–charcoal, indicate that the source vegetation was dominated by gymnosperms. The non–abraded edges of many charcoal fragments suggest that the charcoal has not been transported over a long distance, indicating local to regional fires. Together with previous records of macro–charcoal, and the high inertinite contents of many Permian coals from India, this study further supports the widespread occurrence of palaeo–wildfires as frequent sources of disturbance in continental ecosystems in this part of Gondwana during the early Permian.
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