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Academic literature on the topic 'Lineaments and intrusive'
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Journal articles on the topic "Lineaments and intrusive"
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Sadiq, Hamza Maina, and Alhaji Adam Zarma. "Depth to Magnetic Sources Using Spectral Analysis of High Resolution Aeromagnetic Data Over Machina and Environs, Northeastern Nigeria." Journal of Geography and Geology 11, no. 1 (2019): 70. http://dx.doi.org/10.5539/jgg.v11n1p70.
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Analysis of high resolution aeromagnetic data over Machina and its environment shows areas of low total magnetic intensity contour values are hosts to thicker overburden sediments and near surface intrusive rock bodies reside over high total magnetic intensity contour regions. Positive and negative residual anomaly values depict the presence of basic and acid rock units; however, the acid rocks dominate over the basic components. Major linear features of the residual anomaly are oriented along the NE – SW direction. Some linear features however, cross cut the major lineaments along the NW – SE, N –S, and E – W directions. A NW – SE cross section of the residual anomaly shows irregularity of the bedrock floor. The negative residual anomalies are underlain by granite rocks, while the positive values are within the domain of basic intrusive. Determination of the magnetic source depth revealed depths to the top of the deeper and the shallower sources ranging from 0.6 – 2.0 km and from 0.4 - 0.9 km respectively. Thicker sedimentary covers are underlain by basement rocks while; shallower magnetic horizons are composed of intrusive igneous bodies. Maximum sedimentary thickness of 2.0 km in the study area might not be adequate enough for hydrocarbon maturation and accumulation. Segment directional histogram data shown on rose diagram exhibits strike directions along the E – W, NE – SW, NW – SE, NNE – SSW and NNE – SSW. Most of the fracture lines dip at angles lower than 10 degrees. The north dipping direction group of lineaments is prevalent. Orientations of the structural elements are in conformity with the dominant regional structural grain of the country. Cross- cutting of the lineaments may be related to the geothermal energy in the area as higher interconnected lineaments are associated with higher geothermal energy. Rugged terrain reliefs might have resulted from the effects of tectonic and structural evolution in the area. Variability of the dip angles is associated with non-uniform framework of the forces of deformation on the rocks and/or differential responses of the rocks to the stress imposed on them.
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Sirisokha, Seang, Lucas Donny Setijadji, and I. Wayan Warmada. "MINERAL POTENTIAL MAPPING USING GEOGRAPHIC INFORMATION SYSTEMS (GIS) FOR GOLD MINERALIZATION IN WEST JAVA, INDONESIA." Journal of Applied Geology 7, no. 1 (2015): 61. http://dx.doi.org/10.22146/jag.26980.
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Western Java is a part of the Sunda Banda magmatic belt. This belt is well known to be host for several gold deposits in Indonesia, the distribution of 107 Au occurrences in this area was examined in terms of spatial association with various geological phenomena. The goal of this project is to use GIS to conduct weights of evidence (WofE) model for gold mineralization in West Java, Indonesia. A Geographic Information System (GIS) is a computer system for capturing, storing, querying, analyzing, and displaying geospatial data and weight of evidence method is one of the most important datadriven methods for mapping in GIS. The method is a probability based on technique for mapping mineral potential using the spatial distribution of known mineral occurrences. Therefore this method is very useful for gold potential mapping. There are six evidences maps such as NE–SW lineaments NW–SE Lineament, host rocks, heat sources, clay alteration and limonitic alteration, have been combined using a weights of evidence model to predict gold potential in West Java. The best predictive map generated by this method defines 21.62% (9902 km) of study area as favourable zones for gold mineralization further exploration work. It predicts correctly 74 (92.5%) of the 80 model deposits and predicts correctly 26 (96.35%) of the 27 validation deposits, has 6 main 2 prospective target for future exploration are located in Bayah Dome, southern mountain, Honjie Igneous Complex and Bogor zone, Purwakarta. Bayah Dome is highest potential area for gold deposit like Gunung Pongor, Cikidang, Cirotan, Ciawitali, Cikotok destricts and other deposits. The potential area of Au occurrences in research area is associated with NE–SW and NW–SE structure/ lineaments, dominated surrounding the Tertiary intrusive rock unit and hosted in Miocene to Pleistocene lithology rock unit.
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Aliyu, Ahmed Sidi, Nuhu Musa Waziri, Hadiza Liman Mohammad, Mohammed Abubakar Mohammed, and Apeh Aromeh Gideon. "Reconnaissance geochemical and geophysical exploration for gold at Iri gold field, north central Nigeria." Scientia Bruneiana 18, no. 2 (2020): 19–31. http://dx.doi.org/10.46537/scibru.v18i2.93.
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Reconnaissance geochemical and geophysical exploration for gold was carried out at IRI Gold field. Geological mapping was conducted and rocks, soils and sediments samples were collected. The outcome revealed rocks of the basement complex of Nigeria made up of mainly, Migmatite Gneiss, Older Granite and the Schist. The major lithology in the area is silicified sheared rocks and large quartz vein. Isolated occurrence of undifferentiated schist was found as parent material on which quartzite intruded possibly during a major geological activity. Shattering of the rocks left boulders and rubbles of quartzite all around two major ridges within the study area. The rocks have shown weak geochemical anomaly except in two locations were positive anomalies were observed and identified as target for further exploration. Gold veins are prominent in the area suggesting potential gold mineralization. Interpretation of the aeromagnetic data give the orientations of the structural features, the major structural trend in the area is NE-SW. The lineaments extracted from the magnetic data range in length from 46.43m to about 1251.66m. Most of the lineaments extracted from the area are subsurface within the quartz-mica and migmatites while some of them have surface expressions even though not clearly defined. These magnetic lineaments could be the contacts between two rock types of contrasting magnetic susceptibility or edges of structures that could be faults or intrusive bodies. Interpreted satellite data show several subsurface structures which could be hosts to gold mineralization in the area. Results of the geochemical analysis of rocks, soils and sediments were super imposed on the interpreted aeromagnetic data and similar geochemical and geophysical signatures were established.
 
 Index Terms: Gold mineralization, aeromagnetic data, geochemical data, schist belt, Nigeria
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Pereira, Alice Marques, César Augusto Moreira, José Ricardo Melges Bortolin, Syngra Machado Lopes, and Antonio José Ranalli Nardy. "Magnetometric exploration in intrusive basic with evidence of gold in northern region of the Camaquã Sedimentary Basin (RS)." Rem: Revista Escola de Minas 68, no. 2 (2015): 163–69. http://dx.doi.org/10.1590/0370-44672015680074.
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AbstractThis study involved magnetometric exploration in the region of São Sepé (RS), southern Brazil, to evaluate the potential for gold mineralization in a gabbro using evidence previously obtained from the geochemical exploration of stream sediments. The gabbro named Santa Catarina is intruded in the Metamorphic Complex Vacacaí, a metassedimentary sequence where several gold deposits were recognized. In this study, nine lines of land magnetometry were performed with 1.200m in length each, a total of 10.800m and 720 reading stations. The results suggest the presence of filonian mineralization in fractures, some of which are subject to weathering action, releasing and transporting gold by water action and depositing it along the stream sediments downstream from the gabbro. The analytical signal map outlines areas of high magnetic susceptibility within its boundaries, coinciding with structural lineaments in the NS and EW directions, associated with the last of the four stages of regional deformation, possibly responsible for both fracturing and opening of spaces in the gabbro, as by remobilization of sulfide and gold recognizably described in several gold deposits within the Vacacaí Metamorphic Complex.
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Kasidi, S., and L.G Ndatuwong. "SPECTRAL ANALYSIS OF AEROMAGNETIC DATA OVER LONGUDA PLATEAU AND ENVIRONS, NORTH-EASTERN NIGERIA." Continental J. Earth Sciences 3 (July 7, 2008): 28–32. https://doi.org/10.5281/zenodo.824298.
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The investigation involve the analysis of lineraments and spectral analysis of total intensity magnetic field data over the Longuda Plateau and environs, Guyuk area. The total magnetic field map exhibit direction of NE-SW and E-W lineraments. The NE-SW lineraments coincide with Longuda basalts while the E-W coincide with the Yola arm of Benue Trough. Result from spectral analysis of the aeromagnetic data indicate two depth source model. The depth to deeper magnetic sources ranges from 1900m to 2620m and could be identified with the basement. The shallow magnetic source ranges from 512m to 670m this could be attributed to near surface intrusive. And laying river valleys in the study area. The results obtained from the study compared favorably with that from Gravity studies.
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Hamad, Nali Jawad. "Geomorphological Assessment of the Viability of the Landforms in the Khalekan Valley Basin for Human Uses." Journal of University of Raparin 8, no. 2 (2021): 128–48. http://dx.doi.org/10.26750/vol(8).no(2).paper6.
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The study aims to evaluating the landform in the khalakan basin and its to preparing appropriate model for the capacity of the lands by using remote sensing (RS) technology and geographic information system (GIS) by depending on function of (Wighted-Overlay) which can be considered as one of the significant function of GIS.
 And in order to achieve the aim of the study, eight layers have been extracted for preparing appropriate ground model. according to the importance of each layer which is used to determine the ability and they are: (geological formations, slope, splash erosion, soil, plant cover (NDVI), elevation and lineaments, geomorphological unit) layers which can be considered as the result of Intrusive and extrusive processes. After the processes of Overlaying, the study successfully produced a general map for the appropriateness ground which categorized the area into three levels of appropriateness: the level of high appropriateness with area of(9.34Km), the level of mid appropriateness with area of (70.34Km) and the level with no appropriateness with area of (4.957Km.
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Zaky, Dicky Ahmad, and Alissa Bilqis. "APPLICATION OF GENERALIZED DERIVATIVE OPERATOR ON BOUGUER ANOMALY FOR DETECTING GEOLOGICAL STRUCTURES." Jurnal Geofisika Eksplorasi 8, no. 2 (2022): 113–26. http://dx.doi.org/10.23960/jge.v8i2.204.
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Generalized Derivative Operator (GDO) is one of the first-order derivative filters that could control the derivative’s direction by modifying the value of azimuth () and dip () parameters. This study aims to examine those GDO parameters on synthetic Bouguer anomaly and apply them to field data of the Silver Peak geothermal field to identify the geological structures. We use Python programs to conduct the GDO and other derivative operators such as horizontal gradient (HG), analytic signal amplitude (AS), as well Second Vertical Derivative (SVD) for comparison. The derivative operators are performed in the Fourier domain and spatial domain. The results from synthetic data show that GDO can amplify the response both on local and regional anomalies. Nevertheless, enhanced local and regional anomaly might be shown as the same maximum value of GDO. It appears that GDO disregard the influence of density contrast and depth variation of the anomalous body. Subsequently, anomaly enhancement of Silver Peak area shows that GDO anomaly concurred with geological map. GDO and SVD could amplify the response of geological structures such as intrusive granite, fault lineaments, and lithological contact, as well as the horst-graben structure, as mentioned in previous studies, that might be acting as fluid pathways for the Silver Peak geothermal system.
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Akingboye, Adedibu, and Abimbola Ogunyele. "Basement Classification through Enhanced Magnetic Data Reductions in parts of Ekiti State, Southwestern Nigeria." International Journal of Advanced Geosciences 6, no. 1 (2017): 1. http://dx.doi.org/10.14419/ijag.v6i1.8573.
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Enhanced magnetic data reductions via the use of various forms of filters were employed for basement classification in parts of Ekiti State. The data reductions and enhancement involve: reduction to equator (RTE), regional and residual, automatic gain control (AGC), downward continuation, upward continuations (1, 2, and 3 km), analytic signal (AS) and horizontal gradient (HG) to map and delineate basement rocks and structures, while surface relief and spectral plot were used to determine depth to top of magnetic sources. The images revealed that the study area is characterized by different lithologies. The rocks evinced lineaments and faults trending NE-SW (G–G’, H–H’, J–J’, K–K’), NNE-SSW, E-W (minor) and approximately N-S, while the dykes are in NW-SE, NNW-SSW directions. The analytic signal (AS) and horizontal gradient (HG) revealed high amplitude reversed Z-like shape as migmatite rocks, differentiating them from the two flanks with low amplitude signals as schist and quartzite schist of Ijero and Aramoko and the granitic intrusive within these migmatised rocks around Ijan, Gbonyin and Ise/Otun. The shaded relief and the spectral plot showed that the total depth to top of magnetic sources ranged from 20m to 1.8km for shallower and deeper sources respectively.
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Aali, Ali Akbar, Adel Shirazy, Aref Shirazi, et al. "Fusion of Remote Sensing, Magnetometric, and Geological Data to Identify Polymetallic Mineral Potential Zones in Chakchak Region, Yazd, Iran." Remote Sensing 14, no. 23 (2022): 6018. http://dx.doi.org/10.3390/rs14236018.
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Exploration geologists are urged to develop new, robust, and low-cost approaches to identify high potential zones related to underground/unexplored mineral deposits because of increased depletion of ore deposits and high consumption of basic metal production industries. Fusing remote sensing, geophysical and geological data has great capability to provide a complete range of prerequisite data to accomplish this purpose. This investigation fuses remote sensing data, such as Sentinel-2 and Landsat 7, aerial magnetic geophysical data, and geological data for identifying polymetallic mineralization potential zones in the Chakchak region, Yazd province, Iran. Hydrothermal alteration mineral zones and surface and deep intrusive masses, hidden faults and lineaments, and lithological units were detected using remote sensing, aerial magnetic, and geological data, respectively. The exploratory/information layers were fused using fuzzy logic modeling and the multi-class index overlap method. Subsequently, mineral potential maps were generated for the study area. Some high potential zones of polymetallic mineralization were identified and verified through a detailed field campaign and drilling programs in the Chakchak region. In conclusion, the fusion of remote sensing, geophysical, and geological data using fuzzy logic modeling and the multi-class index overlap method is a robust, reliable, and low-cost approach for mining companies to explore the frontier areas with identical geologic conditions that are alleged to indicate polymetallic mineralization potential.
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Babagana, Mustapha, Abubakar Adamu, El-Yakub A. Idris, et al. "Reassessment of Geophysical Investigation of Zinc(Z), Cupper (Cu) and Lead (Pb) Potential Mineralization Deposits using Aeromagnetic Data in Wase Middle Benue Trough, Nigeria." International Journal for Research in Applied Science and Engineering Technology 11, no. 4 (2023): 2896–905. http://dx.doi.org/10.22214/ijraset.2023.49327.
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Abstract: This effort aims to delineate structures responsible for exploring mineral resources in the Wase middle Benue trough area of Northcentral, Nigeria by evaluating the aeromagnetic data over that region. Oasis Montaj version 6.4 was used to qualitatively and quantitatively evaluate the aeromagnetic data. Techniques for Source Parameter Imaging (SPI) interpretation, including First Vertical Derivative, Analytical Signal, Upward Continuation, and Tilt Derivative, were used in the study. Analytic signal and tilt derivative maps showed different patterns of magnetic signatures independent of magnetization direction with amplitude ranging from 0.1 to 0.2nT/m and -1.3 to 1.4nT/m. They also showed qualitative interpretation applied aids enhance linear features at the expense of deep intrusive bodies like lineaments, fractures, and fault zones which trend Northeast Southwest (NE- SW) in the map of the study area. The boundaries of the geologically interesting anomalies were noticeably accentuated by the upward continuation done at 2 km. Nonetheless, this provides an approximation of the depth of the source of magnetic signatures in the area. The depth measured by SPI ranged from 103.9 to 1473.0 m. In the Eastern and Western regions of the region, respectively, shallow and deep-seated bodies are seen. The depth of the analysis was about 2000m, in conclusion, it was believed that the linear characteristics in the area that are trending northeast to southwest are possible structures for the prospecting of mineral deposits like zinc, copper, and lead
Conference papers on the topic "Lineaments and intrusive"
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Miotti, Gonzalo Preboste. "Seismostratigraphic Analysis of the Vaca Muerta Formation in the Veta Escondida-Rincon de Aranda Area, Neuquén Basin." In SPE Argentina Region Young Professionals Symposium. SPE, 2024. http://dx.doi.org/10.2118/223484-ms.
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Abstract This paper presents the results obtained from the seismic stratigraphic analysis conducted on the Vaca Muerta Formation, of Tithonian - Berriasian age, in the Rincon de Aranda (RDA) and Veta Escondida (VE) fields, located in the northeastern sector of the transition between the central and marginal areas of the Neuquén Basin. The Vaca Muerta Formation is the main source rock in this basin, playing a significant role in the production of unconventional gas and oil. This study identifies and characterizes the interval corresponding to the Vaca Muerta Formation through seismic and well data analysis. The study involved creating sections, interpreting seismic horizons, and generating isochronous, isopach, seismic attribute, structural, and isopach maps, which provided a better understanding of the stratigraphic characteristics of the Vaca Muerta Formation within the specified reservoir. Various surfaces and internal intervals within the Vaca Muerta Formation were identified through well profile analysis and comparison with data from adjacent areas. Deep structural trends oriented NW-SE impact the Tordillo Formation and, to a lesser extent, the Vaca Muerta Formation. These trends reduce structural deformation in the upper sections, creating echelon faults oriented NNW-SSE and negative flower structures, as observed in Rincon de Aranda. An increase in thickness was observed towards the SW, related to the depocenter of the basin and the Entre Lomas structural high to the east of the area. Less deep O-E oriented lineaments are interpreted as related to Andean orogeny and have their greatest impact on the levels corresponding to the Quintuco Formation and upper sections such as the Loma Montosa Formation. The studied area displays a mixed platform depositional system with a total thickness of 570 meters from the Loma Montosa Formation to the base of the Vaca Muerta Formation, with 170 meters of this thickness specifically corresponding to the Vaca Muerta Formation. In the northern sector of Veta Escondida, area and intrusive igneous bodies were detected, affecting the seismic interpretation.