Depth to the bottom of magnetic layer in South America and its relationship to Curie isotherm, Moho depth and seismicity behavior

Precambrian tectonic inheritance control of the NE Brazilian continental margin revealed by Curie point depth estimation

“…The Curie isotherm depends on the mineralogical composition of the crust and upper mantle, the crustal thickness, the tectonic environment, and other physical parameters, such as pressure and temperature [Wasilewsk and Mayhew, 1992;Tanaka et al, 1999;Rajaram et al, 2009;Thébault et al, 2010;Ferré et al, 2014]. Idárraga-García and Vargas [2018] Jefferson Tavares Cruz Oliveira et al…”

Geometry of the Magma Chamber and Curie Point Depth Beneath Hawaii Island: Inferences From Magnetic and Gravity Data

“…The thermal structure of the crust in different geologic environments has been widely investigated using magnetic data (Spector and Grant, 1970;Leu L.-K., 1975, 1977;Byerly and Stolt, 1977;Okubo et al, 1985;Blakely, 1995;Tanaka et al, 1999;Chiozzi et al, 2005;Ross et al, 2006;Trifonova et al, 2009;Gabriel et al, 2011Gabriel et al, , 2012Bansal et al, 2013Bansal et al, , 2016Hsieh et al, 2014;Nwankwo and Shehu, 2015;Nwankwo and Abayomi, 2017); the resulting geomagnetic anomalies above the CPD have been used to delineate magnetic structures (Bhattacharyya and Leu, 1975a, b;Byerly and Stolt, 1977;Blakely and Hassanzadeh, 1981;Blakely, 1988;Chiozzi et al, 2005;Trifonova et al, 2009;Hsieh et al, 2014;Idárraga-García and Vargas, 2018;. Flinders et al (2013) used land and marine gravity data and a 3-D gravity model to calculate the average densities, volumes, and percentages of olivine in the intrusive materials and cumulate cores below the volcanoes in Hawaii.…”

“…Geophysical data collected from the ground and from the airborne were commonly employed in groundwater investigations and subsurface geology (e.g., Meneisy and Al Deep, 2020;Mohamed and Abu El Ella, 2021;Al Deep et al, 2021). On the other hand, Global data from the Earth Gravitational Model and the Earth Magnetic Anomaly Grid have been widely used for crustal studies and the depth to the bottom of the magnetic layer (e.g., Idárraga-García and Vargas, 2018;, whereas gravity data from the Gravity Recovery and Climate Experiment mission have been successfully applied for estimating mass transport and distribution in the Earth's fluid (e.g., Mohamed et al, 2017;Mohamed, 2019;Mohamed, 2020a;Mohamed, 2020b;Mohamed, 2020c;Taha et al, 2021;Mohamed and Gonçalvès, 2021;Mohamed et al, 2022).…”

Bouguer Gravity Anomaly in the Andean Orogenic Belt and its Dynamic Implications for Regional Tectonic Evolution

“…The belt has formed mainly by interactions between the South American and Nazca plates as well as the Antarctic plate (Pardo-Casas and Molnar, 1987). Various aspects of the lithospheric structure of the Andean orogenic belt have been investigated in previous studies, including crustal structure (Gans et al, 2011;Assumpcã o et al, 2013;Heit et al, 2014;Ryan et al, 2016;Sanchez et al, 2017) and Moho depth (ANCORP, 2003;Gans et al, 2011;Ryan et al, 2016;Idá rraga-Garcí a and Vargas, 2017), interpretation of gravity and magnetic anomaly distributions (Alvarez et al, 2012(Alvarez et al, , 2014(Alvarez et al, , 2015Sanchez et al, 2017;Garcia et al, 2018;Meessen et al, 2018;Tamay et al, 2018;Ibarra et al, 2019), P-and S-wave velocities (Vp and Vs) (Gailler et al, 2007;Heit et al, 2008Heit et al, , 2014Bianchi et al, 2013;Chulick et al, 2013;Ward et al, 2013;Liang et al, 2014), and Vp/Vs ratios (Heit et al, 2008(Heit et al, , 2014. Crustal thicknesses in the Andean orogenic belt reach ~75 km in southern Peru and the Bolivian Altiplano, whereas they are close to ~40 km in Ecuador and southern Colombia (Assumpcã o et al, 2013;Chulick et al, 2013).…”