Sains Malaysiana 47(7)(2018): 1387–1392
http://dx.doi.org/10.17576/jsm-2018-4707-05
Taburan
Geokimia Unsur Sedimen Kuaterner Laut Cetek Muara Sungai Kelantan hingga ke
Pelantar Laut China Selatan, Semenanjung Malaysia
(Geochemical
Distribution of the Quarternary Sendiment Elements of Shallow
Estuary Sea
of
Sungai Kelantan until the Platform of South China Sea, Peninsular Malaysia)
NURUL AFIFAH MOHD RADZIR*, CHE AZIZ ALI
& KAMAL ROSLAN MOHAMED
Program Geologi, Pusat
Pengajian Sains Sekitaran dan Sumber Alam, Fakulti Sains dan Teknologi, Universiti
Kebangsaan Malaysia, 43600 UKM Bangi, Selangor Darul Ehsan, Malaysia
Diserahkan: 18 November 2017/Diterima: 23
Februari 2018
ABSTRAK
Analisis geokimia menggunakan kaedah
ICP-MS
menunjukkan taburan geokimia unsur di kawasan kajian
dipengaruhi oleh dua asalan sedimen berbeza iaitu daripada marin
dan daratan. Unsur Ca dan Mg dikenal pasti sebagai unsur marin,
manakala unsur Al, Fe, Mn, Na, Cu, Cr, Zn dan Ni dikenal pasti
sebagai unsur daratan. Unsur Ca dan Mg dikenal pasti terhasil
daripada proses penyahkapuran rangka dan hidupan marin seperti
cengkerang moluska dan foraminifera. Unsur benua berasal daripada
granit dari Gunung Korbu dan Gunung Stong yang disaliri oleh Sungai
Nenggiri dan Sungai Galas, serta batuan argilit arenit yang berasal
dari bahagian selatan dan tenggara Negeri Kelantan dari Gunung
Cintawangsa dan Gunung Stong dan disaliri oleh Sungai Lebir dan
Sungai Galas. Unsur daripada batuan induk membebaskan unsur kimia
semasa luluhawa kimia dan telah dijerap oleh cas-cas negatif pada
permukaan sedimen halus seperti lempung dan lodak sebelum dimendapkan
bersama di dalam kawasan kajian.
Kata kunci: Asalan sedimen; Delta
Sungai Kelantan; taburan geokimia; unsur major; unsur minor
ABSTRACT
The geochemical analysis using ICP-MS
method showed that the geochemical distribution
of elements influenced by two sediment origins: From marine and
terrestrial. Ca and Mg were identified as marine elements, while
Al, Fe, Mn, Na, Cu, Cr, Zn and Ni were identified as terrestrial
elements. The Ca and Mg elements were derived from decalcification
of skeletons of marine life such as mollusc and foraminiferas.
Continental elements might have originated from granites of Gunung
Korbu and Gunung Stong which are drained by Sungai Nenggiri and
Sungai Galas, while and argillaceous arenaceous rocks from the
south and southeastern parts of Kelantan state which originated
from Gunung Cintawangsa and Gunung Stong are being drained by
Sungai Lebir and Sungai Galas. These parent rocks have released
their chemical elements during a chemical weathering and the elements
have been absorbed by negative charges on the surface of fine
sediments such as clay and silt before being deposited in the
study area.
Keywords: Geochemistry distribution; major element; minor element;
sediment origin; Sungai Kelantan Delta
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*Pengarang untuk surat-menyurat;
email: nurulafifah.mradzir@yahoo.com