Malaysian Journal of Geosciences最新文献_第2页

COMPARISON OF ORDINARY KRIGING (OK) AND INVERSE DISTANCE WEIGHTING (IDW) METHODS FOR THE ESTIMATION OF A MODIFIED PALAEOPLACER GOLD DEPOSIT: A CASE STUDY OF THE TEBEREBIE GOLD DEPOSIT, SW GHANA 普通克里格法(ok)与逆距离加权法(idw)在改良古砂矿床估计中的比较——以加纳南部teberebie金矿为例

Malaysian Journal of Geosciences Pub Date : 2022-01-01 DOI: 10.26480/mjg.01.2022.19.28

Casmed Charles Amadu, Sampson Owusu, G. Foli, Blestmond A. Brako, Samuel K. Abanyie

{"title":"COMPARISON OF ORDINARY KRIGING (OK) AND INVERSE DISTANCE WEIGHTING (IDW) METHODS FOR THE ESTIMATION OF A MODIFIED PALAEOPLACER GOLD DEPOSIT: A CASE STUDY OF THE TEBEREBIE GOLD DEPOSIT, SW GHANA","authors":"Casmed Charles Amadu, Sampson Owusu, G. Foli, Blestmond A. Brako, Samuel K. Abanyie","doi":"10.26480/mjg.01.2022.19.28","DOIUrl":"https://doi.org/10.26480/mjg.01.2022.19.28","url":null,"abstract":"The study described in this paper involves the application of a conventional resource estimation method, inverse distance weighting (IDW), and univariate geostatistical technique, ordinary kriging (OK) to the gold grades data from the modified palaeoplacer Teberebie gold deposit, in Ghana. The deposit consists of 4 layered well-defined orebodies referred to as A reef, CDE reef, F24 reef and G reef at the mine environment. Simple, reliable, and adequately accurate resource/reserve estimation are essential to mining operations. Data used for the research were collected by diamond and reverse circulation (RC) drilling. A total of 19353 one-meter composite samples, consisting of 18962 RC chip samples from 695 RC drill holes, and 391 diamond drill core samples from 11 DD holes. Samples were analysed by atomic absorption spectrometry (AAS) for gold (Au). Descriptive statistical treatment was conducted on grade values for the reefs. To analyse for spatial structure of Au mineralisation, experimental downhole, and several horizontal directional semi-variograms were computed, and models fitted. Ore reserves were estimated by OK and IDW methods, and results of the various reefs compared. Regression analysis of estimated results indicate that, the inverse distance square (ID2) model produced estimates that compared well with the OK model in all the ore zones. It is therefore, appropriate to use ID2 as an alternative estimation method to the OK method for purposes of mine planning and grade control.","PeriodicalId":53054,"journal":{"name":"Malaysian Journal of Geosciences","volume":"32 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76091783","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

GEOPHYSICAL INVESTIGATION FOR POST-FOUNDATION ASSESSMENT WITHIN EKITI STATE UNIVERSITY, ADO EKITI, SOUTHWESTERN NIGERIA 尼日利亚西南部ado ekiti ekiti州立大学地基后评价的地球物理调查

Malaysian Journal of Geosciences Pub Date : 2022-01-01 DOI: 10.26480/mjg.02.2022.88.96

Ilugbo Stephen Olubusola, Ajayi Christopher Ayodele, Madukwe Henry Yemagu, A. Babatunde A., Talabi Abel Ojo, O. Akinola, O. Felix, Ajisafe Yemisi Christianah, Talabi Joseph Ifeoluwa

{"title":"GEOPHYSICAL INVESTIGATION FOR POST-FOUNDATION ASSESSMENT WITHIN EKITI STATE UNIVERSITY, ADO EKITI, SOUTHWESTERN NIGERIA","authors":"Ilugbo Stephen Olubusola, Ajayi Christopher Ayodele, Madukwe Henry Yemagu, A. Babatunde A., Talabi Abel Ojo, O. Akinola, O. Felix, Ajisafe Yemisi Christianah, Talabi Joseph Ifeoluwa","doi":"10.26480/mjg.02.2022.88.96","DOIUrl":"https://doi.org/10.26480/mjg.02.2022.88.96","url":null,"abstract":"This study has evaluated the post-construction subsoil integrity of a distressed building in Ado-Ekiti, Southwestern Nigeria, to decipher the in-situ lithology and structural disposition. Four traverses of 100 m length were established in approximately E-W direction with an inter-station spacing of 10 m. Two Geophysical methods were deployed including the ground magnetic method using Proton Precession Magnetometer and Electrical Resistivity method utilizing 2D Electrical Imaging and Vertical Electrical Sounding (VES) techniques. Twelve (20) VES station points were acquired within the investigated area using Schlumberger configuration which gave relevant information on layer stratification and geoelectric parameters. The obtained results from the VES showed four geo-electric layers comprises topsoil, clayey layer, weathered layer, fractured bedrock, and fresh basement. Low apparent resistivity was delineated from the 2D imaging exhibiting unfit materials at distance between 50 to 75 m and 80 to 100m. The magnetic results showed a series of bedrock ridges and depressions. The integration of results revealed that the majority of the study areas are unsuitable except for central parts which indicate appreciable competence and stability.","PeriodicalId":53054,"journal":{"name":"Malaysian Journal of Geosciences","volume":"91 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83807352","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

3D MODELING AND ASSESSMENT OF FLOOD RISK ZONES USING GIS AND REMOTE SENSING IN CATCHMENT AREA TERENGGANU, MALAYSIA 利用地理信息系统和遥感在马来西亚登嘉楼集水区进行洪水风险区的三维建模和评估

Malaysian Journal of Geosciences Pub Date : 2022-01-01 DOI: 10.26480/mjg.02.2022.97.100

S. I., A. M., Sagir I.M

引用次数: 0

MULTIFACETED INVESTIGATION OF PORPHYRY CU-AU-MO DEPOSIT IN HYDROTHERMAL ALTERATION ZONES WITHIN THE GOLD FIELD OF ILESHA SCHIST BELT 伊利沙片岩带金矿热液蚀变带斑岩型铜金钼矿床的多方面研究

Malaysian Journal of Geosciences Pub Date : 2022-01-01 DOI: 10.26480/mjg.02.2022.45.53

K. O. Olomo, S. Bayode, O. A. Alagbe, G. Olayanju, Oluwatoyin Khadijat Olaleye

{"title":"MULTIFACETED INVESTIGATION OF PORPHYRY CU-AU-MO DEPOSIT IN HYDROTHERMAL ALTERATION ZONES WITHIN THE GOLD FIELD OF ILESHA SCHIST BELT","authors":"K. O. Olomo, S. Bayode, O. A. Alagbe, G. Olayanju, Oluwatoyin Khadijat Olaleye","doi":"10.26480/mjg.02.2022.45.53","DOIUrl":"https://doi.org/10.26480/mjg.02.2022.45.53","url":null,"abstract":"This study was carried out to map the distribution of porphyry systems within Ilesha Schist belt Southwestern Nigeria for easy accessibility of commercial gold as well as copper and molybdenum deposits to boost exploitation activities within the area. Airborne magnetic and radiometric data of the area were utilized. The acquired total magnetic intensity map of the field was enhanced with reduction to equator, vertical derivative, analytic signal and spectral analysis. Enhanced total magnetic intensity map of the study area revealed magnetic anomalies related to concealed intrusive rock associated with Cu-Au-Mo deposit at depth ranges from 306 – 421 m. Vertical derivative map revealed shallow magnetic bodies in the southern and western parts, which are probable zones for Cu-Au-Mo deposit. Analytical signal map, with magnetic zones of high intensity value between 0.1 nT/M and 1.7 nT/M highlighted faulted basement blocks impregnated with porphyry the Cu-Au-Mo deposit. Airborne radiometry image shows radioelement distributions for different lithologies. High concentration of potassium signatures observed over some parts of the area revealed hydrothermal alteration zones favourable to concentration of Cu-Au-Mo deposits. Computed Th/k ratio and composite potassium maps enhanced the signature of potassium enrichment associated with hydrothermal alteration zones. Validation of airborne results using geochemical analyses confirms the presence of copper-gold-molybdenum elements within the mapped hydrothermal alteration zones. This research has identified other valuable ore deposit, such as copper and molybdenum, to enhance exploitation activities within the area.","PeriodicalId":53054,"journal":{"name":"Malaysian Journal of Geosciences","volume":"163 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81843986","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

STRUCTURES OF BIRIMIAN AND TARKWAIAN ROCKS AT NORTH-WEST NEW DROBO – IMPLICATION ON DEFORMATION 西北地区二叠系和tarkwaan系岩石构造及其变形意义

Malaysian Journal of Geosciences Pub Date : 2022-01-01 DOI: 10.26480/mjg.01.2022.36.44

M. C. Wilson, Chiri G. Amedjoe, S. Gawu

{"title":"STRUCTURES OF BIRIMIAN AND TARKWAIAN ROCKS AT NORTH-WEST NEW DROBO – IMPLICATION ON DEFORMATION","authors":"M. C. Wilson, Chiri G. Amedjoe, S. Gawu","doi":"10.26480/mjg.01.2022.36.44","DOIUrl":"https://doi.org/10.26480/mjg.01.2022.36.44","url":null,"abstract":"This research leads to identifying the microstructures, the deformation episodes (D) and foliation grades (S) of rocks in the study area. Different geological structures such as shear zones, foliations, micro-faults, crack-seal events, etc. have been identified in the study area. Different phases of deformation episodes and foliation grades have been studied to determine the deformation environments. Senses of shear such as dextral, CS, and CS’ as well as antithetic and synthetic micro-faults and boudins may be identified at the north-west New Drobo. Three (3) main deformational (D) events and foliation grades (S) in both the Tarkwaian sandstones and Birimian volcanic rocks may be identified as D1, D2 and D3 as well as S1, S2 and S3. Recrystallization of quartz and feldspar through bulging (BLG), subgrain boundary rotation (SBR) and grain boundary migration (GBM) have been observed at the study area. The overprinting relationships in the Birimian Supergroup may be identified with three (3) different deformational phases. The first deformation (D1) defines the formation of a vertical shortening, whilst the second deformation (D2) defines oblique shortening. Moreover, the third deformation (D3) is due to high strain rate causing brittle faulting.","PeriodicalId":53054,"journal":{"name":"Malaysian Journal of Geosciences","volume":"8 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87446831","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

2-DIMENSIONAL GROUND RESPONSE ANALYSIS: A REVIEW 二维地面反应分析综述

Malaysian Journal of Geosciences Pub Date : 2020-11-19 DOI: 10.26480/mjg.01.2021.35.40

N. Arjuna, A. Adnan, N. Abu Bakar, Nabila Huda Aizon, Noor Sheena Herayani Harith

引用次数: 0

DELINEATION OF HYDROCARBON SATURATED RESERVOIR SAND USING INTEGRATED 3D PRE-STACK SEISMIC AND WELL LOG DATA IN BONGA – FIELD, CENTRAL SWAMP DEPOBELT, ONSHORE NIGER DELTA, NIGERIA 尼日利亚尼日尔三角洲中部沼泽沉积带bonga油田三维叠前地震和测井综合数据圈定饱和油气储层砂体

Malaysian Journal of Geosciences Pub Date : 2020-11-19 DOI: 10.26480/mjg.02.2021.64.68

Innocent Kiani, Aniefiok Sylvester Akpan

{"title":"DELINEATION OF HYDROCARBON SATURATED RESERVOIR SAND USING INTEGRATED 3D PRE-STACK SEISMIC AND WELL LOG DATA IN BONGA – FIELD, CENTRAL SWAMP DEPOBELT, ONSHORE NIGER DELTA, NIGERIA","authors":"Innocent Kiani, Aniefiok Sylvester Akpan","doi":"10.26480/mjg.02.2021.64.68","DOIUrl":"https://doi.org/10.26480/mjg.02.2021.64.68","url":null,"abstract":"This study has successfully delineated the lateral continuity of hydrocarbon saturated sand reservoir in Bonga field, Niger Delta. 3D pre-stack seismic volume and well logs from two (2) exploratory wells were employed in the pre-stack seismic inversion analysis. The delineated BGA reservoir sand spans across the two (2) wells labelled Bonga-26 and Bonga-30. The reservoir depth ranges from 10490 ft to 10620 ft in Bonga-26 while the reservoir depth ranges from 10390 ft to 10490 ft in Bonga-30. The delineated reservoir is characterized by low gamma ray (< 75 API), water saturation, shale volume and high resistivity as deciphered in their respective well log curves signature. Rock attribute crossplot was carried out to discriminate between the formation fluid and lithology. The crossplot space of VP-VS ratio versus acoustic impedance (AI), discriminates the formation properties into lithology and fluid (gas and brine sand) based on clusters inferring the presence of each formation fluid properties. The inversion cross sections of P-impedance, S-impedance, density (ρ) and VP-VS ratio depicts the spread and lateral continuity of the reservoir sand across the well locations. The delineated zones reveal low P-impedance, density, VP-VS ratio and slight increase in S-impedance which further validate the presence of hydrocarbon in the field.","PeriodicalId":53054,"journal":{"name":"Malaysian Journal of Geosciences","volume":"15 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79593722","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

WELL LOGS ANALYSIS TO ESTIMATE THE PARAMETERS OF SAWAN-2 AND SAWAN-3 GAS FIELD 利用测井资料对沙湾2、沙湾3气田进行参数估算

Malaysian Journal of Geosciences Pub Date : 2020-11-19 DOI: 10.26480/mjg.02.2021.69.75

Raja Asim Zeb, Muhammad Haziq Khan, I. Alam, A. Khalid, Muhammad Faisal Younas

{"title":"WELL LOGS ANALYSIS TO ESTIMATE THE PARAMETERS OF SAWAN-2 AND SAWAN-3 GAS FIELD","authors":"Raja Asim Zeb, Muhammad Haziq Khan, I. Alam, A. Khalid, Muhammad Faisal Younas","doi":"10.26480/mjg.02.2021.69.75","DOIUrl":"https://doi.org/10.26480/mjg.02.2021.69.75","url":null,"abstract":"The lower Indus basin is leading hydrocarbon carriage sedimentary basin in Pakistan. Evaluation of two sorts out wells namely Sawan-2 and Sawan-3 has been assumed in this work for estimation and dispensation of petro physical framework using well log data. The systematic formation assessment by using petro physical studies and neutron density cross plots reveal that lithofacies mainly composed of sandstone. The hydrocarbon capability of the formation zone have been mark through several isometric maps such as water saturation, picket plots, cross plots, log analysis Phie vs depth and composite log analysis. The estimated petro physical properties shows that reservoir have volume of shale 6.1% and 14.0%, total porosity is observed between 14.6% and 18.2%, effective porosity ranges 12.5-16.5%, water saturation exhibits between 14.05% and 31.58%, hydrocarbon saturation ranges 68.42% -86.9%, The lithology of lower goru formation is dominated by very fine to fine and silty sandstone. The study method can be use within the vicinity of central Indus basin and similar basin elsewhere in the globe to quantify petro physical properties of oil and gas wells and comprehend the reservoir potential.","PeriodicalId":53054,"journal":{"name":"Malaysian Journal of Geosciences","volume":"51 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77999092","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

LARGE FORAMINIFERA FROM LIMESTONE IN THE RAJAMANDALA FORMATION, SUKABUMI, WEST JAVA 西爪哇sukabumi rajamandala组石灰岩中的大型有孔虫

Malaysian Journal of Geosciences Pub Date : 2020-11-19 DOI: 10.26480/mjg.02.2021.51.55

Rizki Satria Rachman, Winan tris

{"title":"LARGE FORAMINIFERA FROM LIMESTONE IN THE RAJAMANDALA FORMATION, SUKABUMI, WEST JAVA","authors":"Rizki Satria Rachman, Winan tris","doi":"10.26480/mjg.02.2021.51.55","DOIUrl":"https://doi.org/10.26480/mjg.02.2021.51.55","url":null,"abstract":"Rajamandala Formation is a limestone reef formation that is exposed in the Rajamandala – Sukabumi area, West Java. Different from those in the Rajamandala area, this formation which is located in the Sukabumi area is still rarely analyzed, especially from its large foraminifera. This study aims to assess the content, age, and depositional environment of reef limestone from the Rajamandala Formation based on large foraminifera. Research method was carried out in several stages. Sampling was done by spot sampling as many as 6 samples. Then, thin section observations was carried out using Olympus CX-22 binocular microscope. Finally, age and environmental analysis were carried out using basic biostratigraphic methods and cluster analysis based on the fossil content of large foraminifera. Result, the limestone reefs of Rajamandala Formation in Sukabumi area have varied material content. These rock ages were found to be in the Late Oligocene range (Chattian). This rock depositional environment is in shallow marine environment which is divided into 3 main clusters. The first cluster is dominated by Austrotrilina and Borelis which shows the Backreef shelf environment. The second cluster is dominated by Heterostegina and Cycloclypeus which shows the Forereef shelf environment. Finally, the third cluster is dominated by all large foraminifera representing the Reef environment. When compared with previous studies, the limestone of Rajamandala Formation in Sukabumi and Rajamandala areas has the same age and depositional environment.","PeriodicalId":53054,"journal":{"name":"Malaysian Journal of Geosciences","volume":"47 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88238681","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

CHARACTERIZATION AND UTILIZATION OF CLAYS FROM ORIGO AND AWO SOUTHWESTERN NIGERIA 尼日利亚西南部origo和awo粘土的特性和利用

Malaysian Journal of Geosciences Pub Date : 2019-10-08 DOI: 10.26480/mjg.02.2019.52.58

Oziegbe Ehitua Julius, Olarewaju Victor Ola, Ocan Ojouk Onesmus

引用次数: 5