Application of full tensor gradient invariants in detection of intrusion-hosted sulphide mineralization: implications for deposition mechanisms

Mataragio, James; Kieley, John

doi:10.3997/1365-2397.27.1301.29032

Cited by 29 publications

(6 citation statements)

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“…explorations (e.g. Mataragio and Kieley 2009;Murphy and Dickinson 2009). The full Marussi tensor is a richer source of information than standard single gravity anomalies.…”

Section: Mass Distribution Of Earth Landforms Determined By Aspects O...mentioning

confidence: 99%

Mass distribution of Earth landforms determined by aspects of the geopotential as computed from the global gravity field model EGM 2008

Kalvoda¹,

Klokočník²,

Kostelecký³

et al. 2013

Auc Geographica

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Correlations of large-scale landform patterns with some aspects of the geopotential as computed from the global gravity field model EGM 2008, particularly the radial second derivatives of the disturbing gravitational potential Γ 33 , the strike angle θ S and virtual deformations of the ellipse of deformation, are demonstrated. Selected regions with documentation of aspects from EGM 2008 are the Nepal Himalaya and its neighbouring areas, the collision zone of East-Asian and West-Pacific lithospheric plates, the contact region of north-eastern Africa, south-western Asia and south-eastern Europe, morphotectonic contact between the Bohemian Massif, Eastern Alps and the Western Carpathians in Central Europe and regions of ancient rapid events indicated by relics of large impact craters Vredefort, Chicxulub and Popigai. It is suggested that landform patterns with very conspicuous combinations of significantly high positive or negative values of Γ 33 are under the strong influence of rapid and/or intensive geomorphic processes. These geophysical signatures supported by values of the strike angle θ S and virtual dilatations or compressions of the ellipse of deformation reflect the regional dynamics of Earth surface evolution as characterised by a very effective integration of tectonic and climate-driven morphogenetic processes.

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“…explorations (e.g. Mataragio and Kieley 2009;Murphy and Dickinson 2009). The full Marussi tensor is a richer source of information than standard single gravity anomalies.…”

Section: Mass Distribution Of Earth Landforms Determined By Aspects O...mentioning

confidence: 99%

Mass distribution of Earth landforms determined by aspects of the geopotential as computed from the global gravity field model EGM 2008

Kalvoda¹,

Klokočník²,

Kostelecký³

et al. 2013

Auc Geographica

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“…FTG invariants are effective for resolving complex subsurface structural trends in the upper crust (Mataragio & Kieley, 2009). The rotational invariants are powerful tools for identifying the density contrast between different geological features as well as visualizing all six tensor components from a single image (Mataragio & Kieley, 2009). These data sets commonly resolve high‐frequency and short wavelength anomalies, corresponding to intra‐sedimentary structures in basins.…”

Section: Methodsmentioning

confidence: 99%

“…The advantage of the rotational invariants (Figure 5) is the ability to retain the shape and orientation regardless of the rotation direction of the tensors about the z ‐axis (Mataragio & Kieley, 2009). The structures were extracted manually by carefully tracing the lineaments.…”

Section: Methodsmentioning

confidence: 99%

The Deep Basin and Underlying Basement Structure of the Tanganyika Rift

2023

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The oldest structures in a rift basin define incipient rift architecture, and commonly modulate the patterns of landscape evolution, sedimentation, and associated hazards in subsequent phases of rift development. However, due to deep burial beneath younger, thick syn‐rift sequences, and limited resolution of seismic imaging, critical early‐rift processes remain poorly understood. In the Tanganyika Rift, East Africa, we augment existing 2‐dimensional (2‐D) seismic reflection data with newly acquired aeromagnetic and Full‐Tensor Gradiometry data to assess the deep basin and underlying basement structure. Aeromagnetic and gravity grids show a dominance of NW‐trending long‐wavelength (>5 km) structural fabrics corresponding to the deeper basement, and dominant NW‐trending with a secondary NNE‐trending shorter‐wavelength (<3 km) fabric representing shallower, intra‐basin structures. Seismically‐constrained 2‐D forward modeling of the aeromagnetic and gravity data reveals: (a) an anomalously high‐density (2.35–2.45 g/cc) deep‐seated, fault‐bounded wedge‐shaped sedimentary unit that directly overlies the pre‐rift basement, likely of Mesozoic (Karoo) origin; (b) ∼4 km‐wide sub‐vertical low‐density (2.71 g/cc) structures within the 3.2 g/cc basement, interpreted to be inherited basement shear zones, (c) early‐rift intra‐basin faults co‐located with the modeled shear zone margins, in some places defining a persistent structurally‐controlled intra‐basin “high,” and (d) a shallow intra‐sedimentary V‐shaped zone of comparatively dense material (∼2.2 g/cc), interpreted to be a younger axial channel complex confined between the intra‐basin “high” and border fault. These results provide new insight into the earliest basin architecture of the Tanganyika Rift, controlled by inherited basement structure, and provide evidence of their persistent influence on the subsequent basin evolution.

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“…The Marussi tensor was already used locally (areas of a few kilometres) for petroleum, metal, diamond, groundwater etc. explorations (e.g., Saad [2006], Mataragio and Kieley [2009], Murphy and Dickinson [2009] and many others). The full Marussi tensor is a rich source of information about the density anomalies providing useful details about objects located closely to the Earth's surface.…”

Section: Outlinementioning

confidence: 99%

On feasibility to detect volcanoes hidden under the ice of Antarctica via their “gravitational signal”

Klokočník

Kostelecký

Pešek

et al. 2016

Annals of Geophysics

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<p class="Prosttext1">Many undiscovered volcanoes may be hidden under the thick layers of the ice of Antarctica. Hypothetic volcanoes were sought by means of the best present-day gravitational data (gravity field model EIGEN 6C4) and bedrock topography data (Bedmap2). A new previously unused method was tested. The analogy with the “gravitational signal” typical for volcanoes and other structures in other parts of the Earth is used. Various functions (not only ordinary gravity anomalies) of the disturbing geopotential were employed: Marussi tensor of the second derivatives, geopotential invariants, the strike angle and the virtual deformations. We attempted to discover if the best present-day gravitational and topographic data are of sufficient precision and resolution and how fast is the attenuation of the “gravitational signal” of a volcano with increasing depth under the ice. It is shown that there is no principal obstacle to detect volcanoes by our method. However, it appeared very quickly that our present-day attempts to discover such volcanoes could hardly be successful, mainly due to a low resolution of the existing gravity data and also due to a low resolution of the best bedrock topography of Antarctica currently available. Nevertheless, some examples of hypothetical volcanoes under the ice are given, but they are uncertain. However, the method, the main goal of this feasibility study, is ready and working. <strong></strong></p>

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Application of full tensor gradient invariants in detection of intrusion-hosted sulphide mineralization: implications for deposition mechanisms

Cited by 29 publications

References 0 publications

Mass distribution of Earth landforms determined by aspects of the geopotential as computed from the global gravity field model EGM 2008

Mass distribution of Earth landforms determined by aspects of the geopotential as computed from the global gravity field model EGM 2008

The Deep Basin and Underlying Basement Structure of the Tanganyika Rift

On feasibility to detect volcanoes hidden under the ice of Antarctica via their “gravitational signal”

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