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A Comparison of Geologic Structure Detection of Sumatera Island Using Goce Satellite Gravity Data and Sgg-Ugm-2 Data 利用Goce卫星重力数据与Sgg-Ugm-2数据进行苏门答腊岛地质构造探测的比较
Pub Date : 2022-09-26 DOI: 10.25299/jgeet.2022.7.3.8863
Al Shida Natul, L. Heliani
GOCE gravity satellite data can be used for regional fault detection because the observation area is wide and not limited by area. In this study, GOCE satellite data is used to detect geological structures on the island of Sumatra, the results of which are used as the basis for disaster mitigation. GOCE data and SGG-UGM-2 were processed using the GOCE User Toolbox (GUT) software to produce a gravity disturbance map and a complete bouguer anomaly map. The GOCE obtained results were validated using the SGG-UGM-2 high-resolution gravity model data. The calculation results obtained that the gravity disturbance value from the GOCE data was around -140 to 200 mGal, while the value of the gravity disturbance from the SGG-UGM-2 data was around -180-300 mGal. The GOCE gravity disturbance map and the SGG-UGM-2 can detect the Subduction Trench, Mentawai Fault, and West Andaman Fault on Sumatra Island with negative values, while the Sumatran Fault Zone (SFZ) along Sumatra Island with positive values ​​in line with the presence of mountain ranges. The results of the SGG-UGM-2 data processing for the gravity disturbance are more detailed than GOCE because the SGG-UGM-2 data degree is higher than that of GOCE. GOCE complete bouguer anomaly value is around 40-560 mGal, while the value of complete bouguer anomaly SGG-UGM-2 is around 60-560 mGal. The complete bouguer anomaly maps from GOCE and SGG-UGM-2 can detect patterns from the Subduction Trench, Mentawai Fault, and West Andaman Fault but cannot clearly detect SFZ. The complete bouguer anomaly can also detect differences between oceanic and continental crust. The GOCE and the SGG-UGM-2 complete bouguer anomaly map show almost similar patterns and the ability to detect geological structures for sub and regional Sumatra Island. In addition, GOCE data detect geological structures more clearly than GRACE data.
GOCE重力卫星数据由于观测范围广,不受区域限制,可以用于区域故障检测。在本研究中,GOCE卫星数据被用于探测苏门答腊岛的地质结构,其结果被用作减灾的基础。利用GOCE用户工具箱(GUT)软件对GOCE数据和SGG-UGM-2进行处理,生成重力扰动图和完整的布格异常图。利用SGG-UGM-2高分辨率重力模型数据验证了GOCE所得结果。计算结果表明,GOCE数据的重力扰动值在-140 ~ 200 mGal左右,SGG-UGM-2数据的重力扰动值在-180 ~ 300 mGal左右。GOCE重力扰动图和SGG-UGM-2可以探测到苏门答腊岛上的俯冲沟、明打威断裂和西安达曼断裂为负值,而沿苏门答腊岛的苏门答腊断裂带(SFZ)为正值,符合山脉的存在。由于SGG-UGM-2的数据程度高于GOCE,因此SGG-UGM-2对重力扰动的处理结果比GOCE更详细。GOCE完全布格异常值约为40-560 mGal, SGG-UGM-2完全布格异常值约为60-560 mGal。GOCE和SGG-UGM-2的完整的bouger异常图可以探测到俯冲沟、明打威断裂和西安达曼断裂的模式,但不能清楚地探测到SFZ。完整的布格异常还可以探测洋壳和陆壳之间的差异。GOCE与SGG-UGM-2完整的bouger异常图显示出几乎相似的模式和探测苏门答腊岛亚区域地质构造的能力。此外,GOCE数据对地质构造的探测比GRACE数据更清晰。
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引用次数: 0
Assessment of Geosite and Geomorphosite at South Solok Aspiring Geopark Area 南索洛克阿斯珀地质公园地区的地质遗址和地貌评价
Pub Date : 2022-09-26 DOI: 10.25299/jgeet.2022.7.3.9520
R. Sahara, B. Setiawan
South Solok is one of the five districts designated as the aspiring of the Ranah Minang Geopark. Various reliefs and geological structures cause the diversity of landscapes to be an attraction for tourists and ecosystems with biodiversity. The study intends to identify geosite and geomorphosite in the South Solok area with field observations to describe the state of geology, geomorphology of geosite sites, and geomorphosite. Site assessment is carried out quantitatively with five assessment parameters; scientific, educational, functional, tourist, and posting activities on tourist sites on social media. Field observation found 17 sites classified into four groups, specifically waterfalls, manifestations of hot springs, geomorphological landscapes, and caves. Based on the results of the highest value representation obtained by the Batukapal Cave sites with a value of 44.86% and the lowest at Timbulun Waterfall at 0.1%. Of the 17 sites, four sites are considered the main sites in the research area: Suliti Waterfall, Sapan Maluluang Hot Spring Manifestation, Batukapal Cave, and Camintoran.
南索洛克是被指定为拉纳米南地质公园的五个地区之一。各种浮雕和地质构造使景观的多样性成为吸引游客和具有生物多样性的生态系统的吸引力。本研究拟通过野外观测,对南索洛克地区的地质、地貌、地貌状况进行鉴定。采用5个评价参数对场地进行定量评价;科学、教育、功能、旅游、社交媒体旅游网站发布活动。实地观察发现17处遗址可分为4类,具体为瀑布、温泉表现、地貌景观和洞穴。结果表明,巴图卡帕尔洞穴遗址的代表性最高,为44.86%,廷布伦瀑布遗址的代表性最低,为0.1%。在这17个遗址中,有4个遗址被认为是研究区域的主要遗址:苏里提瀑布、萨潘马鲁朗温泉、巴图卡帕尔洞穴和卡米托兰。
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引用次数: 1
Petrography and Geochemistry for Proposal of Geodynamic Model For The Irbiben Granite in Tagragra d’Akka inlier, (western Anti-Atlas, Morocco) 摩洛哥阿特拉斯西部Tagragra d’akka inlier地区Irbiben花岗岩地球动力学模型的岩石地球化学研究
Pub Date : 2022-09-26 DOI: 10.25299/jgeet.2022.7.3.10275
T. K. L. Boya, Allou Gnanzou, Kouadio Jean Luc Hervé Fossou, Pohn K. Martial Adingra, Dagri David Goulihi, Souad M’rabet
This study aims to contribute to improve the knowledge on the setting of the Irbiben granites, located south of the gold deposit of this locality (Tagragra d'Akka buttonhole, Anti-Atlas, Morocco). The petrographic characterization showed leucocratic porphyry rocks, with a mineralogy dominated by quartz and phenocrysts of plagioclase, alkali feldspars of sometimes centimetric size as well as very small sulphides of metallic luster. Two generations of quartz have been identified: a QIquartz with undulating extinction phenocrysts testifying to an episode of deformation orchestrated in this inlier, and a QII quartz with more rounded and limpid minerals indicating an intense silicification. Plagioclase and alkali feldspars are deeply altered to sericite and epidote. Geochemical characterization classifies these rocks as calc-alkaline series granites, rich in potassium, with a peraluminous character indicating their crustal origin. Their arc geochemical signature, Ba enrichment, and negative Nb, Ti, and P anomalies are characteristic of a subduction zone. This subduction could be associated with an episode of convergence between an oceanic lithosphere located in the north and the West African craton in the south, as shown by the proposed geodynamic model.
本研究旨在提高对该地区(摩洛哥Anti-Atlas的Tagragra d’akka钮孔)金矿以南Irbiben花岗岩构造背景的认识。岩石学特征为白晶斑岩,矿物学以石英和斜长石斑晶为主,有时为厘米级的碱长石,以及非常小的金属光泽硫化物。已经鉴定出两代石英:一种具有起伏的消光斑晶的qi石英证明了在该地层中精心安排的变形事件,一种具有更圆润和透明矿物的QII石英表明了强烈的硅化作用。斜长石和碱长石被深蚀变为绢云母和绿帘石。地球化学特征将其划分为钙碱性系列花岗岩,富钾,具有过铝质特征,表明其地壳成因。弧型地球化学特征、Ba富集、Nb、Ti、P负异常均具有俯冲带的特征。这种俯冲可能与位于北部的海洋岩石圈和位于南部的西非克拉通之间的汇合有关,正如所提出的地球动力学模型所显示的那样。
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引用次数: 0
The Role of Inertinite Characteristics and Coal Porosity of Seam A-1 of Muara Enim Formation in West Merapi, Lahat, South Sumatera, Indonesia 印尼南苏门答腊西默拉皮Muara Enim组A-1煤层惰性岩特征与煤孔隙度的作用
Pub Date : 2022-06-30 DOI: 10.25299/jgeet.2022.7.2.8986
B. Rahmad, B. Prayitno, Susilawati S.S.R, Sugeng, Ediyanto
Coal contains a complex network of nano-, meso-, and a macro-pore can store fluids and allow fluids to flow through it. Nanoporosity in coal is primarily a result of molecules that have aromatic molecular structures and have been preserved in coal. Most adsorbate compounds, including gases, are stored here. The study area is located in South Sumatera, West Merapi Area, Lahat Regency. Geologically, the area in South Sumatra Basin belongs to the Middle-Late Miocene Muara Enim Formation. Using the ply-by-ply method, coal samples were taken directly from Seam-A in the coal mine walls outcrop, based on macroscopically determinable lithotype information. During laboratory analyses, coal is microscopically analyzed to determine the amount of porosity, permeability, and vitrinite reflectance. The purpose of this study is to investigate the change in composition and characteristics of inertinite macerals when the porosity value is varied.. Vitrinite content is between 91.00-92.80 %; liptinite 0.90-3.40%; inertinite 3.70-4.80%; mineral matter 0.7%-1.8%. Withh a vitrinite reflectance average of 0.34-0.36%, the variation in composition is an indication of changes in plant communities or coal facies. It is generally classified as sub-bituminous coal (ASTM). Porosity value of seam A upper  is 1.9% and seam A lower 1.51%, permeability value seam A upper is 70.1 mD and seam A lower 27.1%. Composition of mineral matter in seam A upper is 0.8%  and seam A lower 1.7%.  The increasing number of inertinite pore is followed by lower porosity value. The inertinite maceral is predominantly aromatic with a high level of cross-linking, and exhibits a high level of aromatization and condensation. They have the highest carbon and the lowest oxygen hydrogen content. A coal maceral's porosity is composed of void spaces, such as open cell lumens preserved in semifusinite and sclerotinite. The porosity of cleats is the percentage of volume in relation to volume of coal, and the porosity of permeability. In coal, semifusinite has extensive interconnected pores that can form significant conduits for fluid flow.
煤含有一个由纳米孔、中观孔和大孔组成的复杂网络,可以储存流体并允许流体流过。煤中的纳米多孔性主要是由于具有芳香分子结构的分子保存在煤中。大多数吸附化合物,包括气体,都储存在这里。研究区位于南苏门答腊,西默拉皮地区,拉哈特摄政王。南苏门答腊盆地在地质上属于中-晚中新世Muara Enim组。基于宏观可确定的岩型信息,采用逐层法直接从采煤壁露头的a缝处采集煤样。在实验室分析中,对煤进行微观分析,以确定孔隙度、渗透率和镜质组反射率。本研究的目的是探讨孔隙度变化时惰性矿物组成及特征的变化。镜质组含量在91.00 ~ 92.80%之间;类脂组0.90 - -3.40%;惰性体3.70 - -4.80%;矿物质0.7%-1.8%。镜质组反射率平均值为0.34 ~ 0.36%,其组成变化反映了植物群落或煤相的变化。它通常被归类为亚烟煤(ASTM)。煤层A上部孔隙度为1.9%,煤层A下部为1.51%,煤层A上部渗透率为70.1 mD,煤层A下部为27.1%。A上煤层矿物组成为0.8%,A下煤层矿物组成为1.7%。惰性岩孔隙数量增加,孔隙度降低。无机矿物以芳香为主,具有高水平的交联反应,并表现出高水平的芳构化和缩合反应。它们的碳含量最高,氧氢含量最低。煤矿物的孔隙是由孔洞组成的,如保存在半绢云母岩和核云母岩中的开孔腔。裂隙孔隙度是体积占煤体积的百分比,孔隙度是渗透率。在煤中,半绢云石具有广泛的相互连接的孔隙,这些孔隙可以形成重要的流体流动管道。
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引用次数: 0
Analysis of Grain Morphology, Mineral Composition, and Ore Grade on Gold Placer Deposits in Bantimurung, Pangkep Regency, South Sulawesi, Indonesia 印度尼西亚南苏拉威西邦格普县Bantimurung金矿床颗粒形态、矿物组成及矿石品位分析
Pub Date : 2022-06-30 DOI: 10.25299/jgeet.2022.7.2.9164
U. R. Irfan, Angga Alamin Husain, I. Nur
The information through social media shows that there is quite an intense placer mining activity by local residents in the Bantimurung area, Tondong Tallasa District, Pangkep Regency. This study as a preliminary research aims to determine the grain morphology characteristics of mineral composition and metal grade in gold placer deposits in the study area. The data collected were eight samples. The collected samples were prepared into thin section, polished and observed using a microscope to identify the mineral composition and grain morphology. The grades of Au metal and its associated metals consisting of Ag, Zn, Pb, and Cu in the placer samples were analyzed by the AAS method. Petrography shows abundant of quartz, plagioclase, biotite and pyroxene minerals it might be indication of mineralization of epithermal. Ore petrography shows pyrite present along the river, silver is also found quite a lot along the river. Meanwhile, covellite, magnetite, sphalerite, and garnet were found only slightly at the sampling station this mineral composition indicates that the source of the placer deposits was epithermal. The grain morphology of the thin-section observation shows that quartz dominant has a high sphericity with character of roundness tends to be very angular to sub-rounded from upstream to downstream of the river. Plagioclase tends to have sub rounded roundness and high sphericity. Biotite tends to have a high sphericity with roundness from upstream to downstream is very angular, then angular, then sub-rounded. Pyroxenes tend to have high sphericity with very angular and angular roundness. Au content is directly proportional to Cu and inversely proportional to Zn, Pb, and Ag. Statistically Au affects the content of Cu by 50.97%. It can be concluded that Au is genetically associated with Cu, however Au grains that were still attached to the mineral and had not been separated from other minerals so that it could not be seen visually. This can also indicate that the source of this placer deposit is not far from the study site. Au grade corelated with stream sediment types it is 97,86 ppm for channel bar and 94,16 ppm for point bar, based on this we conclude the downstream has higher grade of Au compare to the upstream.
社交媒体上的信息显示,在庞克普摄政Tondong Tallasa区Bantimurung地区,当地居民的砂矿开采活动相当激烈。本研究是一项初步研究,旨在确定研究区金矿床矿物组成和金属品位的颗粒形态特征。收集的数据为8个样本。将收集到的样品制成薄片,抛光后用显微镜观察,鉴定矿物组成和颗粒形态。采用原子吸收光谱法分析了砂矿样品中的Au及其伴生金属Ag、Zn、Pb、Cu的品位。岩石学显示丰富的石英、斜长石、黑云母和辉石矿物,可能是浅成热液成矿的指示。矿石岩相学显示沿河有黄铁矿存在,沿河也发现了大量的银。同时,取样站仅少量发现银榴石、磁铁矿、闪锌矿和石榴石,这一矿物组成表明砂矿床的来源为浅成低温热液。薄片观察的晶粒形貌表明,石英占主导地位,具有较高的球度,从上游到下游呈极棱角状至次圆形。斜长石具有亚圆的圆度和高的球度。黑云母往往具有较高的球形度,从上游到下游的圆度非常有棱角,然后是有棱角,然后是次圆形。辉石往往具有很高的球度和非常有棱角的圆度。Au的含量与Cu成正比,与Zn、Pb、Ag成反比。统计上Au对Cu含量的影响为50.97%。可以得出结论,金与铜在遗传上是相关的,但金颗粒仍然附着在矿物上,没有与其他矿物分离,因此无法从视觉上看到。这也可以说明该砂矿的来源离研究地点不远。金品位与水系沉积物类型相关,河道砂坝为97、86 ppm,点砂坝为94、16 ppm,由此得出下游金品位高于上游的结论。
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引用次数: 0
Laboratory Study On The Utilization of Jackruit Skin Waste Into Car-boxymethyl Cellulose and Their Effect On The Rheological Properties Of Drilling Mud 利用菠萝蜜废皮制备羧甲基纤维素及其对钻井泥浆流变性能影响的实验室研究
Pub Date : 2022-06-30 DOI: 10.25299/jgeet.2022.7.2.7066
Novrianti Novrianti, Adi Novriansyah, I. Khalid, Z. Amani
The value rheology of drilling mud must be in accordance with the conditions of wellbore that do not lead to the occurrence of the problems at the time of drilling.  One of the efforts to improve the rheology of drilling mud is by adding Carboxymethyl Cellulose (CMC) which is useful for increasing viscosity and binding water. This study aims to identify the effect on the use of CMC originating from jackfruit skin to the rheological properties of drilling mud. Jackfruit skin is an underutilized organic waste and the structure of jackfruit skin contains 50-55% cellulose. Manufacturing phase of synthesizing CMC skin jackfruit includes the process of delignification, alkalization, carboximetilation, and sieve sample to be powdered CMC and subsequently carried out the test of plastic viscosity, yield point , gel strength by using a Fann VG Meter and mud cake using a marsh funnel and volume filtration using a filter press . The added mass of CMC jackfruit skin were varied from 1 g, 2 g, 3 g, 4 g to 5 g. The results suggest that the addition of jackfruit skin CMC has an effect on the rheology of drilling mud. Increasingly many additions additive CMC skin jackfruit who use the increasingly high- value rheology mud drilling were obtained. Furthermore, the addition of CMC jackfruit skin starting from 1gr – 5 gr meets the API 13, a standard for the value of yield point/viscosity plastic, plastic viscosity and maximum volume of filtrate. While the value of gel strength which meets the API 13 A is with the addition of CMC jackfruit skin as much as 5 grams.
钻井泥浆的流变值必须符合钻井时不会导致问题发生的井筒条件。改善钻井泥浆流变性的措施之一是加入羧甲基纤维素(CMC),它有助于提高粘度和结合水。本研究旨在确定菠萝蜜皮CMC的使用对钻井液流变性能的影响。菠萝蜜皮是一种未充分利用的有机废物,菠萝蜜皮的结构中含有50-55%的纤维素。CMC皮菠萝蜜合成的制备阶段包括脱木质素、碱化、羧化,并将样品筛成CMC粉,随后使用范氏VG计进行塑料粘度、屈服点、凝胶强度测试,使用沼泽漏斗进行泥饼测试,使用压滤机进行体积过滤。CMC菠萝蜜果皮的添加量分别为1 g、2 g、3 g、4 g、5 g。结果表明,菠萝蜜皮CMC的加入对钻井泥浆的流变性有影响。越来越多的添加剂CMC皮菠萝蜜用于越来越高的流变性泥浆钻井。此外,添加1gr - 5gr的CMC菠萝蜜皮符合API 13,即屈服点/粘度塑性值、塑性粘度和最大滤液体积的标准。而当CMC菠萝蜜皮的加入量达到5克时,其凝胶强度达到API 13a的要求。
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引用次数: 0
Residual Strength Parameter Method for Slope stability on a Toll Road with Expansive Clay 膨胀粘土收费公路边坡稳定性的剩余强度参数法
Pub Date : 2022-06-30 DOI: 10.25299/jgeet.2022.7.2.9251
G. Pamungkas, T. Putranto, Suharyanto, Muhrozi, Yanuar Niko Priambodo
The decreasing stability phenomenon needs to be considered during the design of cut slopes on problematic soil. Excavation slope of toll road construction tends to fail when it lies above clay-shale strata. Certain common correlations and ordinary analytical methods are not recommended for safety calculation. This study is intended to find out the characteristic of clay-shale and proper slope inclination design on Semarang Batang Toll Road. The behaviour of a clay-shale area on the cut slope of Batang-Semarang toll road segment STA 438+000–STA 439+000 was identified. The degradable and expansive properties caused slope failure of the initial design with an inclination of 1 H: 1 V. Laboratory tests found that the soil had a clay faction > 40% and can be categorized as high plasticity (LL > 50%). An empirical approach determined that the residual shear strength decreased to phi < 6 degrees. To describe the swelling after the excavation stage, the flow deformation was determined by a finite element simulation. During the swelling phase, the pore water pressure was maintained at a certain value, and a gentler slope fulfilled the minimum safety factor with an inclination of 1 V: 3 H. Furthermore, the shear strength of the clay-shale was reduced to that for a fully softened material, and all the slope factors for safety moved to a critical state. According to the simulation, the minimum suggested slope inclination is 5 H: 1 V. This approach is important for the maintenance of pore water pressure and the prevention of an additional reduction in the shear strength so as to avoid slope failure on clay-shale regions in the yielding stage.
在问题土上进行路堑边坡设计时,应考虑边坡稳定性下降现象。收费公路开挖边坡处于泥页岩地层之上时,容易发生破坏。某些常见的关联和普通的分析方法不推荐用于安全计算。本研究旨在了解三宝垄-巴塘收费公路泥页岩特征及合理的坡度设计。确定了巴塘-三宝垄收费公路STA 438+000 - STA 439+000段切坡上的粘土-页岩区特征。在初始设计的1 H: 1 V倾斜度下,可降解性和膨胀性导致边坡破坏。室内试验结果表明,该土粘土组分> 40%,可归为高塑性(LL > 50%)。经验方法确定,残余抗剪强度下降到φ < 6度。为了描述开挖阶段后的膨胀,采用有限元模拟确定了流动变形。在膨胀阶段,孔隙水压力保持在一定的水平,较缓的边坡倾角为1 V: 3 h,满足最小的安全系数,粘土-页岩的抗剪强度降至完全软化材料的抗剪强度,边坡安全系数均进入临界状态。根据模拟结果,建议的最小坡度为5h: 1v。这种方法对于维持孔隙水压力和防止抗剪强度进一步降低,从而避免泥页岩区域在屈服阶段的边坡破坏具有重要意义。
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引用次数: 0
The Petrology and Volcano-Stratigraphy of The Muria-Peninsula High-K Volcanic Rocks, Central Java, Indonesia 印度尼西亚中爪哇穆里亚半岛高钾火山岩的岩石学和火山地层学
Pub Date : 2022-06-30 DOI: 10.25299/jgeet.2022.7.2.9602
S. Mulyaningsih, S. Bronto, A. Kusniadi, Lilis Apriyanti, L. Budiyanto, Danis Agoes Wiloso
The Muria-Peninsula is a Quaternary volcano located in the northern Sunda arc. Its activity was controlled under high potassic and very high potassic magma series resulting in leucite-rich trachyte and pyroxene-rich basaltic-andesite. It is a strato-type volcano that is composed of lava, breccia, and tuff layers, and some dikes have some volcanic craters and maars varying in age and composition. The study area is covering the volcanoes of Muria, Genuk, and Patiayam. This paper aims to describe the petrology, mineralogy, and volcano-stratigraphy of the different volcanic materials. The data and materials were sourced from the primary and secondary data. The methods are field mapping, stratigraphy measurements, collecting samples, thin section analyses, and major element geochemistry using X-Ray fluorescence (XRF). The results describe two groups of volcanic rocks consisting of pyroxene-rich andesitic-basaltic volcanic materials and leucite-rich trachytic volcanic materials. Augite presents in the andesitic basalt together with small grains of olivine and a few anorthite and foid minerals. Aegirine (Na-Pyroxene) is present in the leucite-rich trachyte that is often associated with biotite and hornblende. Na-Ca Plagioclase such as labradorite-andesine is often present in the basaltic-trachy-andesite that is usually rarely leucite. The major elements show high-K volcanic rocks with % K2O is 4-5.9% and very high-K volcanic rocks (with % K2O is between 6-8.24%) and low-K volcanic rocks that contain % K2O is 2-3,9%. There are two groups of high-K to very high-K volcanic materials consisting of silicic-rich volcanic materials (~57-64% of SiO2) and low-silicic volcanic materials (~46-50%). The TAS diagram identifies tephrite, phonolite, and trachyte. Stratigraphic data identifies calcareous sediments of the Bulu Formation as the basement rocks of the Muria trachyandesite. Beds of pumice-rich volcanic breccia of the Ujungwatu Formation are the basement rocks of the basanite-tephrite of the Genuk Volcano, and the tuff of the Ujungwatu is also exposed consisting of the basanite-tephritic-phonolite of the Patiayam Volcano. The leucite-like feldspars are very common in the andesite lava and dikes that compose the crater of Muria. Most of the Muria volcanic materials are rarely in leucite, while some maars contain pumice-rich pyroclastic flows and basaltic lava. The results of the major elemental analysis of the Muria materials indicate that the rock tends to be of medium to high K affinity (~2% K2O). The Genuk and older Muria are consisting of leucite-rich tephrite-phonolite. It was two periods of magmatic series developed in the Muria-Peninsula that was resulting in the high-K to very high-K magmatism and the medium K Kalk-alkaline magmatism.
穆里亚半岛是位于巽他弧北部的第四纪火山。其活动受高钾和极高钾岩浆系列控制,形成富白石质粗面岩和富辉石质玄武安山岩。它是一个层状火山,由熔岩、角砾岩和凝灰岩层组成,一些岩脉上有一些年龄和组成不同的火山口和火星。研究区域覆盖了穆里亚火山、格努克火山和帕蒂亚亚火山。本文旨在描述不同火山物质的岩石学、矿物学和火山地层学。数据和材料来源于一次和二次数据。方法包括野外测绘、地层测量、样品采集、薄片分析和x射线荧光(XRF)主要元素地球化学。结果描述了两组火山岩,由富辉石岩的安山岩-玄武岩火山物质和富白石岩的粗质火山物质组成。安山岩玄武岩中有奥辉石、小粒橄榄石、少量钙长石和铁矿物。石墨烯(na -辉石)存在于富含白铁矿的粗壁岩中,通常与黑云母和角闪石相结合。钠钙斜长石,如拉布拉长安山岩,常存在于玄武岩-粗灰岩-安山岩中,通常很少有白石质。主要元素表现为% K2O为4-5.9%的高钾火山岩、% K2O为6-8.24%的超高钾火山岩和% K2O为2-3,9%的低钾火山岩。富硅火山物质(SiO2含量~57 ~ 64%)和低硅火山物质(SiO2含量~46 ~ 50%)组成了高钾至超高钾火山物质组。TAS图识别翠玉、phonolite和气管岩。地层资料确定布鲁组钙质沉积物为穆里亚粗面岩的基底岩。富浮石的Ujungwatu组火山角砾岩层是Genuk火山玄武岩-软质岩的基岩,暴露的Ujungwatu凝灰岩也由Patiayam火山玄武岩-软质岩-phonolite组成。像白长石一样的长石在构成穆里亚火山口的安山岩熔岩和岩脉中非常常见。穆里亚火山物质大多以白石质为主,部分火山含有富浮石的火山碎屑流和玄武岩熔岩。主要元素分析结果表明,岩石具有中高K亲和性(~2% K2O)。格努克和更老的穆里亚由富含白铜矿的软辉-蓝纹岩组成。穆里亚半岛发育的两期岩浆活动形成了高钾至极高钾岩浆活动和中钾钾碱性岩浆活动。
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引用次数: 1
Morphotectonic Control of Land Movements at Wundulako Region, Kolaka Regency, Southeast Sulawesi Province, Indonesia 印度尼西亚苏拉威西省东南部Kolaka Regency Wundulako地区陆块运动的形态构造控制
Pub Date : 2022-06-30 DOI: 10.25299/jgeet.2022.7.2.9235
Martono, Hasria, S. Asfar, M. Azzaman, L. Ngkoimani, A. Okto, L. Hamimu, Irawati, Sawaludin, La Ode Muhammad Iradat Salihin, Wahab
This research is located at Wundulako District, Kolaka Regency, Southeast Sulawesi Province. The purpose of this study are to determine the level of tectonic activity and the effect of tectonic activity on the land movement of the study area. Based on the DEM (Digital Elevation Model) analysis, geomorphology of the study area is dominated by mountains unit that indicate the influence of tectonic activity. Geomorphological aspects were analyzed to determine the tectonic classes in the study area such as watershed and non-watershed analysis. The results showed that, tectonic class of the study area is classified as very high and moderate tectonic class. The effect of tectonic class level on land movement in the study area shows a least correlation. This interprets that the cause of land movement at study area is not only influenced by tectonic factors but is also influenced by other factors such as rainfall, lithological conditions, geomorphology, earthquakes, and human activities. This shows that morphotectonic control has little effect on the land movements at Wundulako District, Kolaka Regency, Southeast Sulawesi Province, but is also influenced by other factors such as rainfall, lithological conditions, geomorphology, earthquakes, and human activities.
本研究位于苏拉威西省东南部Kolaka Regency的Wundulako区。本研究的目的是确定研究区构造活动水平和构造活动对陆地运动的影响。基于DEM (Digital Elevation Model)分析,研究区地貌以山地单元为主,反映了构造活动的影响。对研究区进行了地貌分析,确定了流域和非流域的构造分类。结果表明,研究区构造等级可分为非常高和中等构造等级。构造等级水平对研究区陆地运动的影响相关性最小。这说明研究区陆地运动的成因不仅受构造因素的影响,还受到降雨、岩性、地貌、地震、人类活动等因素的影响。这表明,在苏拉威西省东南部Kolaka Regency的Wundulako地区,形态构造控制对陆地运动的影响不大,但也受到降雨、岩性条件、地貌、地震和人类活动等其他因素的影响。
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引用次数: 1
Interpretation and Identification of Unexploded Aircraft Ammunition Sites from Reconnaissance Flight Images 侦察飞行图像中未爆飞机弹药地点的解释和识别
Pub Date : 2022-06-01 DOI: 10.35180/gse-2022-0064
Maria Budayová, Karla Srnová, J. Pospíšil, V. Safar
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引用次数: 0
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JGEET Journal of Geoscience Engineering Environment and Technology
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