TY - GEN

T1 - Fracture Network Analysis of the Balmuccia Peridotite by Drone-Based Photogrammetry

AU - Menegoni, Niccolo

AU - Greenwood, Andrew

AU - Hetényi, György

PY - 2022

Y1 - 2022

N2 - A drone-based Digital Outcrop Model (DOM) of the Balmuccia Peridotite (Ivrea-Verbano Zone, Italy) was developed to quantitatively characterize the rock discontinuity network and to aid interpretation of high-resolution seismic datasets that cross the drilling target of the Drilling the Ivrea-Verbano zonE (DIVE) Phase 2 project. Thanks to the photograph resolution (3 cm/pixel), the drone on-board Real Time Kinematic-Global Navigation Satellite System, and the Ground Control Points, it was possible to develop a high resolution and accurate DOM. Eight sets of discontinuities (e.g., fault, fracture, layering) are identified, their length distributions are defined, and the areal intensity (P21) and spatial variations estimated. The orientations of the discontinuity sets agree with previous field-based studies indicating a good validity of DOM-analysis. It shows that the N-S vertical set (pyroxenite layers marking the foliation) is the most frequent, the E-dipping set has the highest size, and the two vertical sets trending ca. WNW-ESE and WSW-ENE (trace of fault system) have the lowest frequency and size. Moreover, the dataset shows that the highest P21 is located closer to the inactive quarry and to the Peridotite-Mafic complex contact. These findings will have major implications for the interpretation of the high-resolution seismic data of the Balmuccia target.

AB - A drone-based Digital Outcrop Model (DOM) of the Balmuccia Peridotite (Ivrea-Verbano Zone, Italy) was developed to quantitatively characterize the rock discontinuity network and to aid interpretation of high-resolution seismic datasets that cross the drilling target of the Drilling the Ivrea-Verbano zonE (DIVE) Phase 2 project. Thanks to the photograph resolution (3 cm/pixel), the drone on-board Real Time Kinematic-Global Navigation Satellite System, and the Ground Control Points, it was possible to develop a high resolution and accurate DOM. Eight sets of discontinuities (e.g., fault, fracture, layering) are identified, their length distributions are defined, and the areal intensity (P21) and spatial variations estimated. The orientations of the discontinuity sets agree with previous field-based studies indicating a good validity of DOM-analysis. It shows that the N-S vertical set (pyroxenite layers marking the foliation) is the most frequent, the E-dipping set has the highest size, and the two vertical sets trending ca. WNW-ESE and WSW-ENE (trace of fault system) have the lowest frequency and size. Moreover, the dataset shows that the highest P21 is located closer to the inactive quarry and to the Peridotite-Mafic complex contact. These findings will have major implications for the interpretation of the high-resolution seismic data of the Balmuccia target.

U2 - https://doi.org/10.3997/2214-4609.202220052

DO - https://doi.org/10.3997/2214-4609.202220052

M3 - Conference contribution

VL - 2022

BT - NSG2022 3rd Conference on Airborne, Drone and Robotic Geophysics

ER -