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Journal of Geological Society of India (Online archive from Vol 1 to Vol 78)

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Mehrotra, Naresh C.

New Global Opportunities for Hydrocarbon Exploration in Neoproterozoic Basins of Indian Subcontinent

Abstract Views :232 | PDF Views:2

Authors

Naresh C. Mehrotra ¹, Rupendra Babu ¹, Rajni Tewari ¹, Neerja Jha ¹, Prabhat Kumar ², Veeru Kant Singh ¹, Manoj Shukla

Affiliations
1 Birbal Sahni Institute of Paleobotany, 53, University Road, Lucknow-226007, IN
2 Zoology Department, Lucknow University, Lucknow-226007, IN

Source

Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 72, No 4 (2008), Pagination: 543-546

Abstract

First record of Type I matured, Liptinite organic matter facies from the Gotan Limestone (Late Neoproterozoic) in Rajasthan is considered significant. This throws open an entirely new basin for hydrocarbon exploration from the Neoproterozoic sediments in Rajasthan and other similar prospective basins in India. The palynological assemblage recorded from the studied samples also contains larve of the petroleum fly Helaeomyia (=Psilopa Coquillet) petrolei, known to live in pools of crude petroleum. The significance of the find is discussed in this brief communication.

Keywords

Hydrocarbon Exploration, Neoproterozoic Basins, Rajasthan.

Full Text

B. S. Venkatachala (1933-2007)

Permian Megaspores from Kuraloi Area, Ib-River Coalfield, Mahanadi Basin, Orissa

Abstract Views :176 | PDF Views:0

Authors

Rajni Tewari ¹, Naresh C. Mehrotra ¹, K. L. Meena ¹, S. S. K. Pillai ¹

Affiliations
1 Birbal Sahni Institute of Palaeobotany, 53, University Road, Lucknow - 226 007, IN

Source

Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 74, No 6 (2009), Pagination: 669-678

Abstract

Heterogenous megaspores recovered from the Upper Permian sediments of Kuraloi Area, Ib-River coalfield, have been systematically described. The megaspore assemblage includes seven genera with seventeen species viz. Bokarosporites rotundus, Banksisporites indicus, B. utkalensis, Biharisporites spinosus, Biharisporites sp. A, Biharisporites sp. B, Jhariatriletes baculosus, J. srivastavae, J. damudicus, Manumisporites distinctus, Singhisporites baculatus, S. radialis, S. surangei, Ramispinatispora indica, R. nautiyalii and Ramispinatispora sp. Additionally, a new species of Ramispinatispora viz. R. mahanadiensis has been identified. Associated spore pollen assemblages are suggestive of a Late Permian age corresponding to Raniganj/Kamthi Formation. Raniganj megaspores are known from Damodar and Godavari Basins. The newly recorded megaspore assemblage from the Ib-River coalfield is comparable to that of Raniganj/Kamthi Formation of Godavari Graben. The diversity in exosporium ornamentations indicates structural diversity. Moreover, their prolific presence ultimately points towards occurrence of heterosporous source vegetation in the area.

Keywords

Megaspores, Raniganj, Ib-River Coalfield, Mahanadi Basin, Orissa.

Full Text

References

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SINGH, K.J., GOSWAMI, S. and CHANDRA, S. (2007) Occurrence of Cordaitales from Lower Gondwana sediments of Ib-River Coalfield, Orissa, India - An Indian Scenario. Jour. Asian Earth Sci., v.29, pp.666-684.

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Palynology in Hydrocarbon Exploration: High Impact Palynological Studies in Western Offshore and Krishna-Godavari Basin

Abstract Views :185 | PDF Views:0

Authors

Naresh C. Mehrotra ¹, B. S. Venkatachala ¹, P. N. Kapoor ²

Affiliations
1 Birbal Sahni Institute of Palaeobotany, 53, University Road, Lucknow - 226 007, IN
2 KDMIPE, ONGC, Dehradun - 248 195, IN

Source

Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 75, No 2 (2010), Pagination: 364-379

Abstract

This paper presents an updated account of palynostratigraphic, source rock evaluation and palaeoenvironment data on Western Offshore and Krishna Godavari (K-G) Basins. Forty three dinoflagellate biohorizons have been identified in the Tertiary subsurface of Mumbai Offshore, facilitating a high resolution correlation of Oil bearing horizons. In K-G Basin integrated palynostratigraphic data and the composite general lithologies for the Mesozoic and Cenozoic have been presented in a tabular form; Eighty two dinoflagellate biohorizons have been identified. A very fine dinoflagellate based stratigraphic resolution has been achieved at most levels making it useful in geological modelling for hydrocarbon exploration in both Western Offshore and K-G Basin.

Useful information on matured organic matter facies distribution in Panna Formation (Western Offshore) and Cretaceous of K-G Basin has been summarized. Recently, potential source rock facies have been identified in Panna Formation in Western Offshore.

Limitations of present studies and future areas of focus have been outlined.

Keywords

Palynology, Hydrocarbon Exploration, Western Offshore, K-G Basin.

Full Text

Late Pleistocene and Early Holocene Climate of Ny-Alesund, Svalbard (Norway): A Study based on Biological Proxies

Abstract Views :201 | PDF Views:2

Authors

Vartika Singh ¹, Anjum Farooqui ¹, Naresh C. Mehrotra ¹, Dhruv Sen Singh ², Rajni Tewari ¹, Neerja Jha ¹, Ratan Kar ¹

Affiliations
1 Birbal Sahni Institute of Palaeobotany, 53, University Road, Lucknow – 226 007, IN
2 Centre for Advance Studies in Geology, Lucknow University, Lucknow – 226 007, IN

Source

Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 78, No 2 (2011), Pagination: 109-116

Abstract

Subsurface sediments of a 120 cm deep trench from Ny-Alesund, Svalbard, were analysed for pollenspores and other organic matter contents. This study is supported by two AMS ¹⁴C dates (27, 200 yrs BP and 8,762 yrs BP) at the bottom and topmost litho-unit of the trench, respectively. The pollen record provides an evidence of a warm interval at about 27,200 yr BP (Late Weichselian and MIS 3) and cooling episode around 8,762 yr BP. This is also supported by the amount and type of organic matter as well as sediment type and depositional history of the trench sediments.

Keywords

Biological Proxies, Trench Section, Late Weichselian, Ny-Alesund, Svalbard.

Full Text

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