3D geological modeling based on gravitational and magnetic data inversion in the Luanchuan ore region, Henan Province, China

Wang, Gongwen; Zhu, Y.; Zhang, Shouting; Yan, Changhai; Song, Yaowu; Ma, Zhanhong; Hong, Dongming; Chen, Tianzhen

doi:10.1016/j.jappgeo.2012.01.006

Cited by 46 publications

(12 citation statements)

References 19 publications

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“…The Luanchuan ore district is the large porphyry–skarn Mo ore cluster in the East Qinling orogen (Figure 2; Mao et al, 2011; Wang et al, 2012, 2015; Wang, Ma, et al, 2017) and sandwiched by the Miaozi Fault to the north and the Luanchuan Fault to the south. The sedimentary rocks in the Luanchuan area are dominated by the Mesoproterozoic Guandaokou Group, the Meso‐ to Neoproterozoic Kuanping Group, the Neoproterozoic Luanchuan Group, and the Early Palaeozoic Taowan Group.…”

Section: Regional Geologymentioning

confidence: 99%

“…The East Qinling–Dabie orogen is an important molybdenum metallogenic belt, hosting >8 Mt Mo and 40 Mo‐related deposits or occurrences, and constitutes >60% of Mo reserves in China (Li & Pirajno, 2017; Mao et al, 2011; Zeng et al, 2013). These Mo deposits are predominantly porphyry or skarn types (Mao et al, 2011; Ni et al, 2015; Pirajno & Zhou, 2015; Wang et al, 2012, 2015, 2017), with some magmatic hydrothermal vein‐type or carbonatite‐hosted deposits (Deng, Santosh, Yao, & Chen, 2014; Deng et al, 2015; Tang et al, 2021a). Within this belt, porphyry Mo deposits formed in a post‐collisional regime (Chen & Li, 2009; Chen, Wang, Li, Yang, & Pirajno, 2017; Li et al, 2012; Yang, Chen, Pirajno, & Li, 2015), which is distinct from traditional porphyry deposits that formed mainly in oceanic subduction–related magmatic arcs (Audétat & Li, 2017; Klemm, Pettke, & Heinrich, 2008; Lawley, Richards, Anderson, Creaser, & Heaman, 2010; Seedorff & Einaudi, 2004a, 2004b; Selby & Creaser, 2001; Selby, Nesbitt, Muehlenbachs, & Prochaska, 2000).…”

Section: Introductionmentioning

confidence: 99%

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Genesis and fluid evolution of the Yuku porphyry Mo deposit, East Qinling orogen, China

Xue

Wang

et al. 2021

Geological Journal

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The Yuku is a large porphyry Mo deposit (1.5 Mt at 0.12% Mo) in the Luanchuan ore district of the East Qinling orogen, central China. The economic Mo ore bodies occur as veins, veinlets, and disseminated ore and are developed mainly within the late Mesozoic Yuku porphyritic granite. Molybdenum mineralization is generally associated with potassic and phyllic alteration. Hydrothermal processes in the Yuku deposit are divided into four stages: (I) a quartz–K‐feldspar–biotite ± pyrite stage, (II) a quartz–molybdenite ± pyrite ± K‐feldspar ± sericite stage, (III) a quartz–polymetallic sulphide stage, and (IV) a calcite ± quartz ± fluorite ± pyrite stage. The fluid evolution during these hydrothermal stages was constrained through systematic investigation of fluid inclusions (FIs) and H−O isotopes. Four types of primary or pseudosecondary FIs were recognized in hydrothermal quartz and calcite: two‐phase liquid‐rich inclusions (L‐type), two‐phase vapour‐rich inclusions (V‐type), halite‐bearing (hypersaline) inclusions (H‐type), and three‐phase CO2‐bearing inclusions (C‐type). FIs within Stages I–IV have homogenization temperatures of 375 to >550, 297–400, 198–298, and 149–188°C, with salinities of 0.53–13.18, 0.35–40.23, 5.11–11.81, and 5.71–9.73 wt% NaCl equiv., respectively. In Stage I, coexisting vapour‐rich (V‐type) and liquid‐rich (L‐type) FIs have similar homogenization temperatures (488 to >550°C) and distinct salinities, indicating fluid boiling during the formation of quartz–K‐feldspar–biotite veins at a pressure of 550–700 bar and a lithostatic depth of 2.3–2.8 km. In Stage II, FIs in quartz were also trapped under boiling conditions, as evidenced by coexisting hypersaline H‐type (34.13–40.23 wt% NaCl equiv.) and low‐salinity V‐type (0.35–2.24 wt% NaCl equiv.) inclusions, which formed at temperatures of 309–361°C and hydrostatic depths of 1.0–2.0 km, equivalent to pressures of 100–200 bar. During Stage III, the ore‐forming fluids were cooler (198–298°C) and more dilute (5.11–11.81 wt% NaCl equiv.) due to the involvement of meteoric water, with minimum trapping pressures estimated at <100–150 bar, corresponding to a hydrostatic depth of <1.0 km. In Stage IV, temperatures decreased further to 149–188°C, with lower salinities (5.71–9.73 wt% NaCl equiv.), indicating a post‐ore fluid stage. These data suggest that the mineralizing fluids forming the Yuku Mo deposit changed from early moderate‐ to low‐salinity CO2‐rich fluids in the H2O–NaCl–CO2 system that formed at high temperature and pressure, to late H2O–NaCl low‐salinity fluids that formed at low temperature and pressure. H−O isotopic compositions indicate that the mineralizing fluids had a dominantly magmatic signature but were diluted by meteoric waters. Combining our integrated analysis of the fluid evolution and deposit geology, we propose that fluid boiling and fluid–rock interaction, including intensive potassic alteration, changed the salinity and triggered CO2 escape, leading to a decrease in fO2 and an increase in the acidity of the ore‐forming fluids...

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Section: Regional Geologymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Genesis and fluid evolution of the Yuku porphyry Mo deposit, East Qinling orogen, China

Xue

Wang

et al. 2021

Geological Journal

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“…Multivariate principal component analysis method is used for determining elemental correlations and elemental paragenesis (Afzal et al, 2010;Davis, 2002;Deng et al, 2007Deng et al, , 2008. PCA method has reduced dimensions and is commonly used in the geochemical studies (Carranza and Hale, 2002;Carranza, 2010;Wang et al, 2011Wang et al, , 2012Wang et al, , 2013Wang et al, , 2014. In this paper, lithogeochemical samples (with 100 m*100m cells) have been processed using PCA method and resulted in 2 factors including Cu-Zn and Mo-As-Pb.…”

Section: -1-geological Layermentioning

confidence: 99%

Porphyry Copper Prospectivity Mapping Using Fuzzy and Fractal Modeling in Sonajeel Area, Nw Iran

Yazdi

Rad

Aghazadeh

et al. 2018

Bulletin of the Mineral Research and Exploration

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Main purpose of this research is to present a local scale GIS-based mineral prospectivity model for prospecting Cu porphyry mineralization, and to validate the produced model by field observation, surface sampling and drilling data. Sonajeel area which is the subject of this study is a part of Arasbaran mineralization belt, NW of Iran.Constructing a mathematical exploratory algorithm based on a mineralization type is a complicated and interdisciplinary task. For this purpose, results from processing and interpreting different data sets including geology, geochemistry and remote sensing were considered. A comprehensive exploratory integration model was built up considering the exploration stage and the descriptive porphyry mineralization model suggested by Sillitoe, 2010. In order to prepare inputs for GIS-based exploration model, value assigned grids or evidence layers were produced using fuzzy membership curves and then integrated via gamma fuzzy function. In addition, for defuzzification and prioritizing the mineral prospectivity map, a Concentration-Area (C-A) fractal model was applied on the pixel values of the prospectivity map. Finally, the results were confirmed via field observation, surface sampling and drilling. Borehole logs at the first priority displayed a Cu mineralization zone with an average grade of 0.5%.

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“…With its continuous development, Three dimensional geological modeling have been widely used in the field of geological exploration, mathematical geology, geophysics, mine surveying, mine geology, graphics, scientific visualization, and engineering applications [2][3][4][5]. it is the basis for the exploration and development of oil and gas resources, and solid mineral resources.…”

Section: Introductionmentioning

confidence: 99%

Design and implementation of Human-computer interaction geological modeling software based on Qt framework

Xiong¹,

Shi²,

Wang³

2017

IJSEA

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Three-dimensional geological modeling is the basis of exploration and exploitation of oil, gas, and solid mineral resources. It has vital significance for engineering decision-making and scientific management. A cross-platform geological modeling and visualization software with independent intellectual property rights is developed, based on the Qt framework. The 2.5D geological model is built with the Human-computer interaction (HCI) method, and converted to 3D model which displayed real time based on OpenGL. Software testing results show that the software can run on Windows, Linux platforms and meeting the basis requirement of cross-platform HCI modeling of the mineral exploration.

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3D geological modeling based on gravitational and magnetic data inversion in the Luanchuan ore region, Henan Province, China

Cited by 46 publications

References 19 publications

Genesis and fluid evolution of the Yuku porphyry Mo deposit, East Qinling orogen, China

Genesis and fluid evolution of the Yuku porphyry Mo deposit, East Qinling orogen, China

Porphyry Copper Prospectivity Mapping Using Fuzzy and Fractal Modeling in Sonajeel Area, Nw Iran

Design and implementation of Human-computer interaction geological modeling software based on Qt framework

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