International Symposium on Earth Resources Management and Environment: Recent submissions

  • Assessment of rare earth element potential in intrusive rocks special reference to massenna zircon granite 
    Jayasuriya, JHAATS; Jayathilake, RGMA; Jeyakumar, J; Batapola, NM; Dushyantha, NP; Abeysinghe, AMKB; Premasiri, HMR [Conference-Full-text]
    Sri Lanka has a geological setting that favors the presence of rare earth elements (REEs), which are currently identified as the most critical and strategic elements in the world. Previous geochemical studies show that ...
  • REE Potential in carbonatite deposits: a case study of Eppawala carbonatite 
    Batapola, NM; Dushyantha, NP; Premasiri, HMR; Abeysinghe, AMKB; Rohitha, LPS; Ratnayake, NP; Dissanayake, DMDOK; Ilankoon, IMSK; Dharmaratne, PGR [Conference-Abstract]
    Rare earth elements (REEs) are currently the most strategic elements in the world due to their significance in the diversified technological applications. Currently, a total of 478 million tonnes of REE resources is ...
  • Remote sensing analysis of urban heat island effect in Colombo city from 2001-2019 
    Dissanayake, DMDOK; Jeyakanth, K; Kurugama, KAKM; Ruwanthi, TPC [Conference-Full-text]
    Urban Heat Island (UHI) is a metropolitan area where the temperature is several degrees higher than surrounding rural areas. In the context of UHI phenomenon, Land Surface Temperature (LST) was estimated using Landsat ...
  • Feasibility of extraction of cerium dioxide (CeO2) from monazite at Pulmoddai 
    Rasanjalee, PHAU; Delaksana, S; Sampath, MD; Dushyantha, NP; Batapola, NM; Dissanayake, DMDOK; Rohitha, LPS [Conference-Full-text]
    Monazite concentration in Pulmoddai mineral sand deposit in Sri Lanka is 1.38%. Its Rare Earth Elements (REE) composition is about 61%. Currently, only heavy minerals are separated and cerium rich monazite is discarded. ...
  • Key factors of metastable phase formation for strength development in steel slag and dredged soil mixtures 
    Toda, K; Otake, T; Sato, T; Sato, H; Weerakoon, N; Nishimura, S [Conference Full-text]
    The usage of by-products from industrial activities, as construction resources is awaited in Japan to decrease the environmental impacts. Steel slag from ironworks and dredged soil extracted beneath the ports are examples ...
  • Applicability of ground penetration radar (GPR) technique to optimize soil Nail Wall designs 
    Lasan, HLI; Weerasekara, MN; Prashanth, S; Abeysinghe, AMKB; Premasiri, HMR; Samaradivakara, GVI [Conference-Full-text]
    Soil nailing is used to stabilize existing natural slopes or excavations using soil reinforcement technique. Due to lack of information on ground profiles and thickness of soil layers, the required soil nail lengths cannot ...
  • Geochemical aspects of Calcite and Dolomite deposits around Rajawaka off Balangoda, Sri Lanka, and suitability for industry 
    Liyanage, WLDNK; Ranasinghe, GHPGKM; Yapa, SKSP; Weerawarnakula, S; Premasiri, HMR; Abeysinghe, AMKB [Conference Full-text]
    Major calcite and dolomite occurrences are found in Rajawaka off Balangoda in Sri Lanka. The area is undertaken by Precambrian marble rock which is one of the most common sources of calcite and dolomite in Sri Lanka. Field ...
  • Influence of mechanical and aggregate properties of rock on powder factor in rock blasting 
    Karunanayake, KDP; Dharmaratne, PGR; Rohitha, LPS [Conference Full-text]
    Profit margins in metal quarrying have drastically reduced in Sri Lanka due to high powder factors recorded in recent rock blasting activities. Importance of analysing the influence of mechanical and aggregate rock ...
  • Effectiveness of emulsion explosives in quarrying in high grade metamorphic rocks in Sri Lanka 
    Weerawarnkula, S; Hemalal, PVA; Pathirana, KPR [Conference Full-text]
    The optimization of explosive usage in Sri Lankan metamorphic rock is the main objective of this research. Sonic velocity of the rock is a reliable indicator of its structural integrity and resistance to fragmentation. ...
  • Processing vein quartz in Badulla area to suit manufacturing chemically reinforced glasses 
    Pathirage, SS; Hemalal, PVA; Rohitha, LPS; Siriwardhana, YPS; Ratnayake, NP [Conference Full-text]
    Chemically reinforced glass, commercially known as tempered glass has a high global demand with the rapid increase in the usage of touch-screen type mobile phones and tablets. To maintain a high quality and to enable ...
  • Relationship between Los Angeles abrasion value and mineral content of metamorphic rocks 
    Dayarathna, IWTP; Puswewala, UGA; Abeysinghe, AMKB; Rohitha, LPS [Conference Full-text]
    This research includes study of the relationship between Los Angeles Abrasion Value and the mineral content of rock aggregates narrowed down to the commonly found high grade metamorphic rocks in Sabaragamuwa Province. Los ...
  • Applicability of pre-heating techniques for recovery of garnet from garnet biotite gneiss 
    Jayakodi, JDSU; Weliwita, BY; Nishanthan, SS; Samaradivakara, GVI; Abeysinghe, AMKB; Rohitha, LPS; Vijitha, AVP [Conference-Full-text]
    In mineral processing industry, the highest energy is consumed by crushing and grinding operations. However, if we can initiate micro cracks in the hard rock pieces in advance, we should be able to reduce the crushing ...
  • Dynamics of the Madu-Ganga Estuary 
    De Silva, UHNH; Somasiri, RBHP; Jayasekara, NNL; Ratnayake, AS; Dushyantha, N; Weththasinghe, SM; Samaradivakara, GVI; Vijitha, AVP; Ratnayake, NP [Conference Full-text]
    Among the estuaries in Sri Lanka, Madu-Ganga Estuary plays a significant role to generate a massive income through tourism. The existing tropical ecosystem attracts the tourists. However, this ecosystem faces problems of ...
  • Nearshore sediment dynamics in Sri Lanka 
    Ratnayake, AS; Weththasinghe, SM; Dushyantha, N; Premasiri, HMR; Ratnayake, NP [Conference Full-text]
    Coastal environment is a unique morphodynamic system for diverse changes. The present study estimated coastal morphodynamic changes and sediment transportation directions at locations of Uswetakeiyawa beach nourishment ...
  • Structures of water column and sediment sub-bottom in the Tangalle Bay, Sri Lanka 
    Weththasinghe, SM; Ratnayake, AS; Dushyantha, N; Ratnayake, NP; Samaradivakara, GVI; Vijitha, AVP [Conference Full-text]
    Water quality parameters and local morphology are important for monitoring aquatic life, and for planning any coastal development project. So far, few studies have been carried out in Sri Lanka for identifying water ...
  • Fluctuations in groundwater level and corresponding earth resistivity changes 
    Chandrasena, RTPIU; Madushanka, GHSP; Amalan, K; Samaradivakara, GVI; Chaminda, SP; Jayawardena, CL [Conference Full-text]
    The earth resistivity at a known location was frequently measured, through resistivity sounding. Resistivity of subsurface layers could be influenced by the permeability, porosity, transmissivity, composition etc., where ...
  • Effect of organic bio-polymer on bio-mineralization of CaCO3 
    Nawarathna, THK; Nakashima, K; Kawasaki, S [Conference Full-text]
    Organic matrix in the biogenic CaCO3 has a significant influence on the CaCO3 crystal growth, its polymorphs and morphology. In this research, effect of the cationic and anionic organic bio-polymers on the crystallization ...
  • Diamond core drilling for narrow vein graphite exploration - as practiced at Bogala Mines, Sri Lanka (A Case Study) 
    Ekanayake, EMKB [Conference Full-text]
    The vein type graphite deposits which are rich in carbon found in Sri Lanka occur in metamorphic rocks as narrow steeply dipping veins. In Sri Lanka, generally these graphite deposits are explored by diamond core drilling ...
  • Optimizing the specific charge for limestone blasting at Aruwakkalu Limestone Quarry 
    Perera, WDS; Epa NBM; Neligama, DA; Hemalal, PVA; Dharmaratne, PGR [Conference Full-text]
    The objective of this research is aimed at optimizing the specific charge for limestone blasting at Aruwakkalu limestone quarry without leading to poor fragmentation of the blasted material. Thus, in reducing costs incurred ...
  • Effects of metal ions on flotation of Sulfide minerals 
    Mayumi, I; Atsuhiro, T; Tatsuya, S; Tsuyoshi, H; Carlito, BT; Naoki, H [Conference Full-text]
    Flotation is a mineral processing method that using deference of Hydrophilicity/hydrophobicity. In flotation, air bubbles are induced to the slurry that contains ground ore and water. Hydrophobic minerals are attached to ...