31st Annual Technical Sessions

GSSL – 31st Annual Technical Sessions “Understanding Geology for Better and Safer Living” organized by Geological Society of Sri Lanka held on 27th February 2015 at Postgraduate institute of Science (PGIS), University of Peradeniya.

Technical Session I

Geophysics, Tectonics, Engineering Geology and Petrology


Is the Mohorovicic Seismic Discontinuity the Bed of Earthquakes?
Atula Senaratne

An Electromagnetic Survey in the Area around Rangala Graphite Mine for Detecting Subsurface Graphite Veins, Sri Lanka
K.M.P.C Karunarathne and H.A. Dharamagunawardhane

Vertical Cross Section of Eppawala Carbonatite Intrusion Based on Magnetic Data
W.K.D.G.D.R. Charles, N.D. Subasinghe, Nalin De Silva and H.M.T.G.A. Pitawala

Use of Magnetic Method to Delineate the Kawisigamuwa Phosphate Occurrences
S.P. Rajapakshe, N.D. Subasinghe, Nalin de Silva, U. Dahanayake, W.K.D.G.D.R. Charles and S.A. Samaranayake

Effectiveness of Ground Penetrating Radar and Electrical Resistivity Methods to Pinpoint Solution Cavities: A Case Study from Matale
A.M.T.H. Abeysinghe, Udeni B. Amarasinghe and M.I.D.H. Wijewickrama

Gondwana Breakup and Development of Sedimentary Basins in Sri Lanka
E.K.C.W. Kularathna, H.M.T.G.A. Pitawala, Atula Senaratne and Damsith Weerasinghe

Sub Volcanic Sedimentary Depositional Environment in Mannar Basin, Sri Lanka
W.A.G.K. Wickramasinghe, H.M.T.G.A. Pitawala, Chathuranga Senevirathne and Dhamsith Weerasinghe

A Preliminary Study on Pre-Flood Volcanic Hydrocarbon Prospectivity in the Mannar Basin, Sri Lanka
E.K.C.W. Kularathna, H.M.T.G.A. Pitawala and Atula Senaratne

Comparison between Ground Investigation Data and Actual Observed Data: A Case Study, SSDS “Tunnel F”, Hong Kong
L.H.D.D. Hasitha

Application of Rock Mass Classification Systems in Dyraaba Conveyance Tunnel of Uma Oya Multipurpose Development Project
W.G.P.P. Premarathne, A.A.J.K. Gunatilake and S.W. Nawaratne

Investigation of Geological and Geotechnical Aspects for Construction of the Main Dam, Moragahakanda Reservoir, Sri Lanka
K.M.D.P. Kumara, A.A.J.K. Gunatilake, S.M.N.M. Senevirathna

Zircon U-Pb and Lu-Hf Isotope Systematics from Meta-igneous Rocks of Sri Lanka: Geochemical Evidence for Convergent Margin Magmatism
Sanjeewa P. K. Malaviarachchi, M. Santosh, T. Tsunogae, X. He and P.L. Dharmapriya

Powder XRD Study of Gem Quality Corundum (Alpha-Al2O3): A Qualitative Method to Identify Synthetic and Natural Corundum
D. Ranatunge and G.W.A.R. Fernando

Formation of Garnet + Corundum during Isobaric Cooling of UHT Metapelites in the Highland Complex, Sri Lanka
P.L. Dharmapriya, Sanjeewa P. K. Malaviarachchi, Andrea Galli, Ben-Xun Su, N.D. Subasinghe and C.B. Dissanayake

Reactivation of Landslides and Subsidence Threats due to Marble Band: A Case Study from Watagoda and Dodandeniya in Matale
M.M.C.U.B. Moremada, M.I.D.H. Wijewickrema, Subhashini Bindusara, M.K.C. Jayamali, W.D.G.D.T. Rajapaksha and H.A.H. Jayasena

Technical Session II

Earth Surface Processes and Geochemistry, Paleoclimate, Value Addition and Processing of Industrial Minerals


Application of OSL as a Tool to Date Depositional Ages of Quaternary Deposits: A Case Study from ‘Rathnapura Beds’, Sri Lanka

‘Tilak Hewawasam

Appraisal of Gem Deposits in Badalkumbura Area, Sri Lanka

R.M.R.S. Ratnayake, S.V.T.D. Raveendrasinghe, R.M.N.P.K. Jayasinghe, T.S. Dharmaratne  and H.M.R. Premasiri

Stream Sediment Geochemistry and Mineral Potential of Walawe Basins

H.P. Marasinghe, G.R.N. Gunarathana, P.N. Ranasinghe  and Shamalie Siriwardana

Evidence for Pre-2004 Basin-Wide Tsunamis from Dondra Lagoon of Southern Sri Lanka

T. Ambillapitiya, P.N. Ranasinghe and C. Amarasinghe

Climate Implications on Water Stress and Selected Water Quality Parameter Variations: A Case Study from Daduru Oya Basin

E.G. Rosairo and H.A.H. Jayasena

Occurrence of Trace Fossils in Eastern Coast of Sri Lanka: Implications for Paleoenvironment

A.M.N.M. Adikaram, H.M.T.G.A. Pitawala, H. Ishiga and D.T. Jayawardane

Mine Water Problem at the Bogala Graphite Mine, Sri Lanka

A.G.R.P. Weerasinghe and H.A. Dharmagunawardhane

Arsenic and Cadmium in Water of North Central Province of Sri Lanka: Implications to Widespread Chronic Kidney Disease of Unknown Aetiology   (CKDu)

Bernard N. Prame, Shamalie Siriwardana, Sanjeewa Hettiarachchi, Priyanka Jayalath and Vindya Wanasinghe

Effectiveness of Soil Coservation in Mahaweli Catchment, Sri Lanka: A Case Study from Uma Oya Sub Catchment

Saranga Diyabalanage, Sandun Illangasinghe, K.K. Samarakoon, S.B. Adikari and Tilak Hewawasam

Groundwater Recharge Mechanism in the Ambanganga Basin, Sri Lanka: An Assessment Based on Stable Isotope Technique

E.A.N.V. Edirisinghe, H.M.T.G.A. Pitawala, H.A. Dharmagunawardhane and R.L. Wijayawardana

Value-addition to Sri Lankan Impure Marbles through Synthesis of Nanomaterials

M.M.M.G.P.G. Mantilaka, H.M.T.G.A. Pitawala, D.G.G.P. Karunaratne and R.M.G. Rajapakse

Purity Enhancement of Natural Flake  Graphite in Sri Lanka

R.M.U.M. Somarathna, H.P.T.S. Hewathilake, L.P.S. Rohitha, N.W.B. Balasooriya and H.W.M.A.C. Wijayasinghe

HF Acid Digestion for Purification of Vein Graphite  

H.P.T.S Hewathilake, H.W.M.A.C. Wijayasinghe, N.W.B. Balasooriya and H.M.T.G.A. Pitawala

Producing Raw Silica from Sri Lankan Vein Quartz Suitable for High End Glass Industry

S.S. Pathirage, P.V.A.  Hemalal, L.P.S.  Rohitha, Shamalie Siriwardana and N.P. Ratnayake

Chemical and Mineralogical Stability of Biotite under Acidic and Basic Conditions    

A.U. Wijenayake, H.M.T.G.A. Pitawala, C.L. Abayasekara  and B.M.R. Bandara

Estimating Optimum Beach Angle for Heavy Mineral Deposition Along Sri Lankan Beaches

R.B.D.L. Bandara and Atula Senaratne

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