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Thematic interpretation of heliborne magnetic data for delineation of concealed regional structural fabric in the Narnaul-Palsana Tract, North Delhi fold belt, India

Amit Kumar Pathak, G. V. Giridhar and Anand Kumar Chaturvedi
Thematic interpretation of heliborne magnetic data for delineation of concealed regional structural fabric in the Narnaul-Palsana Tract, North Delhi fold belt, India
Interpretation (Tulsa) (May 2018) 6 (2): T367-T375

Abstract

The North Delhi Fold Belt (NDFB) exposure of the Delhi Supergroup of rocks is significant for its structurally controlled uranium mineralization. The Narnaul-Palsana tract within the Khetri subbasin of the NDFB comprises the arenaceous Alwar and argillaceous Ajabgarh Groups of the Delhi Supergroup. The metasedimentary sequence has been subjected to polyphase deformation and igneous intrusion. We used heliborne magnetic data to enhance our geologic understanding of the area. Total magnetic intensity data are gridded and enhanced to resolve the magnetic anomalies. The regional magnetic signature reveals a deep-seated fracture. Varying concentrations of magnetic minerals in different lithologies are reflected in the magnetic response and provide clues to the formational trends. Trend lines and breaks are extracted from the magnetic signature. Thematic analysis of trend lines reveals formational trends that indicate an antiformal and synformal fold pattern in different sectors of the study area. The spatial correlation of the fold patterns is used to decipher the tectonic sequence. Superimposition of antiformal folding over earlier antiform-synform structure and displacement due to later faulting is inferred. Magnetic data analysis is used as a tool to unravel the regional structural fabric of the area that is widely concealed below soil cover.


ISSN: 2324-8858
EISSN: 2324-8866
Serial Title: Interpretation (Tulsa)
Serial Volume: 6
Serial Issue: 2
Title: Thematic interpretation of heliborne magnetic data for delineation of concealed regional structural fabric in the Narnaul-Palsana Tract, North Delhi fold belt, India
Affiliation: Atomic Minerals Directorate for Exploration and Research, Hyderabad, India
Pages: T367-T375
Published: 201805
Text Language: English
Publisher: Society of Exploration Geophysicists, Tulsa, OK, United States
References: 38
Accession Number: 2019-006807
Categories: Economic geology, geology of ore depositsApplied geophysics
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: block diags., geol. sketch maps
N27°19'60" - N28°10'00", E75°15'00" - E76°10'00"
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2019, American Geosciences Institute.
Update Code: 201906
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