Aeromagnetic identification and modeling of mafic-ultramafic complexes in the Huangshan-Turaergen Ni-Cu metallogenic belt in NW China: Magmatic and metallogenic implications

Ge, Tengfei; Qiu, Liang; He, Jingzi; Fan, Zhengguo; Huang, Xuzhao; Xiong, Shaoxiang

doi:10.1016/j.oregeorev.2020.103849

Cited by 11 publications

(4 citation statements)

References 61 publications

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“…The use of airborne magnetic data has provided a quick, economical, and regional-scale prospecting possibility as a flexible geophysical method for mapping surface and subsurface features and geology structures based on the variation of the geomagnetic field [15,16,17]. The airborne magnetic approach has been used to locate fractures, faults, and ring systems in basement rocks, which may influence mineralization [18,9,19,20,21,22], and have been used to map geologic structures related to orogenic gold deposit [23,24,25].…”

Section: Introductionmentioning

confidence: 99%

Application of Airborne Magnetic Data to Assess the Structures that Favour Gold Mineralization within Southern Parts of Katsina State, Nigeria

A. F.,

M. D

2024

JGEESI

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The Nigerian schist belts are endowed with gold mineralisation and to delineate the geological structures that favour gold mineralisation, the airborne magnetic data that cover the study area was employed. Also, the residual magnetic anomaly data of the research area was reduced to the Equator (RTE) followed by the application of the centre for exploration targeting (CET) plug-in and three source edge mapping techniques; analytic signal (AS), first vertical derivative (FVD) and the horizontal gradient magnitude (HGM), for structural delineation and subsequently the structural density map of the area was produced. Structural density varies from 0.186 km/km2 low to 0.93 km/km2 high. Portions within the study area with high structural densities are Bakori in the southwest, Shanono in the northeast, Gwarzo situated directly south of Shanono, north and south of Karaye, the border between Kafur and Rogo in the south, all within the schist. Since structures are conduits for the migration of mineralisation fluids, areas with high structural densities will be viable for gold mineralisation. Also, comparing the structural density map of the area to the analytic signal map of the area has revealed the high structural density portions to coincide with the high analytic signal zones. This implies that structures within these portions are responsible for the migration of mineralization fluid into these environments.

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Section: Introductionmentioning

confidence: 99%

Application of Airborne Magnetic Data to Assess the Structures that Favour Gold Mineralization within Southern Parts of Katsina State, Nigeria

A. F.,

M. D

2024

JGEESI

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“…Here we use magnetic data, sensitive to the presence of iron‐rich rocks at temperatures below the Curie point, to map at depth the distribution of unknown ophiolites and basaltic rocks associated with paleo‐subduction systems and intraplate magmatism. Iron‐rich rocks of ophiolite complexes and magmatic arcs are usually highly magnetized (Hunt et al., 1995), thus allowing identification and determination of their subsurface extent by magnetic methods, such as was done for the Cascadia forearc (Blakely et al., 2005), the Mesozoic volcanic arc in the South China Sea (Li et al., 2018), mafic‐ultramafic complexes below the Gobi Desert sediments (Ge et al., 2020), and the Oman ophiolite where geometry and off‐shore extent are unknown (Ali et al., 2020).…”

Section: Introductionmentioning

confidence: 99%

“…mafic-ultramafic complexes below the Gobi Desert sediments (Ge et al, 2020), and the Oman ophiolite where geometry and off-shore extent are unknown (Ali et al, 2020).…”

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confidence: 99%

Geodynamics of the Central Tethyan Belt Revisited: Inferences From Crustal Magnetization in the Anatolia‐Caucasus‐Black Sea Region

2023

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We calculate the depth to magnetic basement and the average crustal magnetic susceptibility, which is sensitive to the presence of iron‐rich minerals, to interpret the present structure and the tecto‐magmatic evolution in the Central Tethyan belt. Our results demonstrate exceptional variability of crustal magnetization with smooth, small‐amplitude anomalies in the Gondwana realm and short‐wavelength high‐amplitude variations in the Laurentia realm. Poor correlation between known ophiolites and magnetization anomalies indicates that Tethyan ophiolites are relatively poorly magnetized, which we explain by demagnetization during recent magmatism. We analyze regional magnetic characteristics for mapping previously unknown oceanic fragments and mafic intrusions, hidden beneath sedimentary sequences or overprinted by tectono‐magmatic events. By the style of crustal magnetization, we distinguish three types of basins and demonstrate that many small‐size basins host large volumes of magmatic rocks within or below the sedimentary cover. We map the width of magmatic arcs to estimate paleo‐subduction dip angle and find no systematic variation between the Neo‐Tethys and Paleo‐Tethys subduction systems, while the Pontides magmatic arc has shallow (∼15°) dip in the east and steep (∼50°–55°) dip in the west. We recognize an unknown, buried 450 km‐long magmatic arc along the western margin of the Kırşehir massif formed above steep (55°) subduction. We propose that lithosphere fragmentation associated with Neo‐Tethys subduction systems may explain high‐amplitude, high‐gradient crustal magnetization in the Caucasus Large Igneous Province. Our results challenge conventional regional geological models, such as Neo‐Tethyan subduction below the Greater Caucasus, and call for reevaluation of the regional paleotectonics.

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“…This ore district lies in a mediumhigh mountainous area with complex terrain and dense vegetation, making it difficult to carry out large-scale ground surveys. However, aeromagnetic surveys can greatly assist in geological prospecting, delineating concealed intrusions, and researching tectonic evolution in the above-mentioned areas [11][12][13][14][15][16]. From 2015 to 2017, the China Aero Geophysical Survey and Remote Sensing Center for Natural Resources (AGRS) undertook a highprecision aeromagnetic survey in the Tengchong-Yunxian area, Yunnan Province [17].…”

Section: Introductionmentioning

confidence: 99%

An Efficient and Economical Combination of Exploration Methods for Pb-Zn Polymetallic Skarn Deposits: A Case Study of the Periphery of Hetaoping Deposit, Yunnan Province, China

Tan

et al. 2022

Minerals

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The Hetaoping ore district in Baoshan City, Yunnan Province, is one of the major localities of Pb-Zn polymetallic skarn deposits in China, where geophysical and geochemical surveys play an important role in exploring Pb-Zn polymetallic mineral resources. Based on the exploration and prospecting carried out at the periphery of the Hetaoping Pb-Zn polymetallic deposit, this study proposed an aero-ground joint exploration method to determine the metallogenic model of distal skarns in the Hetaoping ore district, achieving ideal prospecting results. The steps of this method are as follows. First, the locations of ore-induced anomalies were determined using high-amplitude aeromagnetic anomalies. Then, the ore-induced anomalies were determined to be anomalies of Pb-Zn polymetallic deposits through geochemical surveys of soil samples and ground geophysical surveys. Based on these data, a quantitative analysis and metallogenic potential assessment of ore bodies and their surrounding rocks were conducted using the interactive 2.5D magnetic inversion. In addition, the 3D inversion of regional gravity data was also performed in order to determine the spatial location of the deep magma chamber. Accordingly, the metallogenic geological process in this area was analyzed by determining the spatial morphology of the deep magma chamber, and a prospecting model of the Pb-Zn polymetallic deposits was finally built. The results show that the aero-ground joint exploration method, which first conducts a rapid scanning survey using the aeromagnetic method and then locates, distinguishes, and assesses significant aeromagnetic anomalies by combining comprehensive verification means such as ground geophysical, geochemical, and geological surveys, is efficient and economical. This study will guide regional metallogenic research and the exploration and prospecting of Pb-Zn polymetallic deposits.

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Aeromagnetic identification and modeling of mafic-ultramafic complexes in the Huangshan-Turaergen Ni-Cu metallogenic belt in NW China: Magmatic and metallogenic implications

Cited by 11 publications

References 61 publications

Application of Airborne Magnetic Data to Assess the Structures that Favour Gold Mineralization within Southern Parts of Katsina State, Nigeria

Application of Airborne Magnetic Data to Assess the Structures that Favour Gold Mineralization within Southern Parts of Katsina State, Nigeria

Geodynamics of the Central Tethyan Belt Revisited: Inferences From Crustal Magnetization in the Anatolia‐Caucasus‐Black Sea Region

An Efficient and Economical Combination of Exploration Methods for Pb-Zn Polymetallic Skarn Deposits: A Case Study of the Periphery of Hetaoping Deposit, Yunnan Province, China

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