3D Inversion of magnetic data of grouped anomalies — Study applied to São José intrusions in Mato Grosso, Brazil

Ribeiro, Vanessa Biondo; Louro, Vinicius Hector Abud; Mantovani, Marta Sílvia Maria

doi:10.1016/j.jappgeo.2013.03.013

Cited by 6 publications

(2 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Outcropping alkaline bodies show a maximum depth/major axis of 4.5/4.5 km for Araxá, 17/9 km for Tapira, 12–15/10 km for Serra Negra-Salitre and 5/5 km for Catalão 1, and alkaline bodies without surface manifestation show a minimum depth/major axis of 0.3–2/6 km for Pratinha and <2/14 km for Registro do Araguaia 44 . At the southwestern border of the Parecis Basin, along Azimuth 125°, a set of currently shallow intrusive bodies were identified from magnetic anomalies, having maximum length and thickness of approximately 11 and 3.6 km, respectively 49 . These dimensions suggest that, at the time of its placement, the surface of the terrain experienced a probable uplift of 0.1 to 1 km 45 .…”

Section: Discussionmentioning

confidence: 99%

Origin of the largest South American transcontinental water divide

Ribeiro

Riccomini

Leite

2018

Sci Rep

View full text Add to dashboard Cite

Interbasin arches between hydrographic systems have a heterogeneous geological origin, forming under the influence of several different geomorphological processes. Independent of the underlying processes, these arches compartmentalize present-day river basins, encompassing different water chemistries, habitat types, soil domains, potential energy and, on a geological/evolutionary time scale, aquatic life varieties in the ecosystem. Through most of its length, the water divide between the Amazonian, Paraná-Paraguay, and São Francisco river basins in central South America coincides with an Upper Cretaceous intracontinental igneous alkaline province. This magmatism, independent of its nature, caused intense crustal uplift and influenced hydrological networks at different scales: from continental-scale crustal doming to continental break-up, and finally to local-scale phenomena. The available ages for alkaline rocks indicate a well-defined time-interval between 72.4 to 91 Ma (concentrated between 76 and 88 Ma) period of uplift that contributed to large-scale drainage compartmentalization in the region. Here we show that uplift associated with intrusive magmatism explains the origin and maintenance of the divide between the Amazonian, Paraná-Paraguay, and São Francisco river basins.

show abstract

Section: Discussionmentioning

confidence: 99%

Origin of the largest South American transcontinental water divide

Ribeiro

Riccomini

Leite

2018

Sci Rep

View full text Add to dashboard Cite

show abstract

“…But the area covering layer thickness, morphology of ore bearing rock buried depth, stratigraphy and structural rule is unknown, the exploration work deployment is of poor effectiveness. In order to reduce the target area rapidly, and guide the further mineral exploration and evaluation work effectively, the magnetic method measurement work (Eun-Jung et al, 2011;Vanessa et al, 2013;Wang et al, 2012;Yang et al, 2011) for the concealed ore-bodies prospecting was carried out starting from July 2012. Totally, we have surveyed finished the magneticzation surveying of the Laba ore field more than 3 square kilometres.…”

Section: Introductionmentioning

confidence: 99%

Magnetic Method Surveying and Its Application for the Concealed Ore-Bodies Prospecting of Laba Porphyry Molybdenum Ore Field in Shangri-La, Northwestern Yunnan Province, China

Dai¹,

Xue²,

Xiang³

et al. 2014

GEP

View full text Add to dashboard Cite

Recently, a number of large molybdenum (-copper) deposits have been discovered successively in the Laba area, Shangri-La county, northwestern Yunnan province. The investigation confirmed that there is a superlarge porphyry-skarn hydrothermal vein type molybdenum-polymetallicmetallogenic system with the total prediction reservoir of more than 150 mt molybdenum. The porphyry intrusions contributed to the mineralization closely, the superficial little vein molybdenum (-copper, lead, silver) ore-bodies are usually located in faults and fractures, and the deep porphyry type ore-bodies occurred in the granodiorite porphyries, the skarn type ore-bodies occurred in the contact zone intrused into Triassic limestone or Permian basalts. Laba ore block is a new exploration area with great prospecting potential. In order to reduce the target area and guide the further exploration work, the magnetic method measurement about 3.3 square kilometres was carried out in the ore field. This paper presents an application of analyzing the horizontal and vertical derivative, using Fast Fourier Transform (FFT) filter (FFT high-pass, low-pass, cosine roll-off, suscepbility), calculated spectra frequency energy to predict the depth and intensity of the apparent remanence magnetization of source (Hilbert). The calculated results and magnetic anomalous show that the remanence anomaly is caused by the intrusions into the Triassic limestone and Permian basalts with small anomalies, and the depth of located source is not great. We have identified a number of positions to the three drilled well, the drilled result specify interpretation with very high accuracy. The magnetic method is helpful to identify porphyry mineralization, and judge the shape and depth of the concealed ore-bearing intrusive bodies under the similar geological condition.

show abstract

Gamma spectrometric and magnetic interpretation of Cabaçal copper deposit in Mato Grosso (Brazil): Implications for hydrothermal fluids remobilization

Ribeiro

Mantovani²

2016

Journal of Applied Geophysics

View full text Add to dashboard Cite

3D Inversion of magnetic data of grouped anomalies — Study applied to São José intrusions in Mato Grosso, Brazil

Cited by 6 publications

References 11 publications

Origin of the largest South American transcontinental water divide

Origin of the largest South American transcontinental water divide

Magnetic Method Surveying and Its Application for the Concealed Ore-Bodies Prospecting of Laba Porphyry Molybdenum Ore Field in Shangri-La, Northwestern Yunnan Province, China

Gamma spectrometric and magnetic interpretation of Cabaçal copper deposit in Mato Grosso (Brazil): Implications for hydrothermal fluids remobilization

Contact Info

Product

Resources

About