Chemical composition of the Tertiary black shales of West Sabah, East Malaysia

作     者：Amer M. Burgan Che Aziz Ali Sanudin Hj Tahir 

作者机构：School of Environmental and Natural Resources Department of Geology Faculty of Science and Technology University Kebangsaan Malaysia 43600 UKM Bangi Selangor Geology Program School of Science and Technology University Malaysia Sabah 88999 Kota Kinabalu Sabah Malaysia Locked Bag 2073 

出 版 物：《Chinese Journal Of Geochemistry》 (中国地球化学学报)

年 卷 期：2008年第27卷第1期

页      面：28-35页

核心收录：

学科分类：070902[理学-地球化学] 0709[理学-地质学] 07[理学] 

基　　金：University Kebangsaan Malaysia 

主　　题：化合物 页岩 第三纪 马来群岛 

摘      要：The X-ray fluorescence and ICP methods were used to analyze 60 outcrop samples of black shale, of which 15 were collected from Belait, 15 from the Setap Shale, 15 from Temburong, and 15 from the Trusmadi for- mations. The average compositions of the shales from the study area are 64.62%, 63.95%, 62.32%, 63.84% SiO2, 1.84%, 2.14%, 2.04%, 1.99% MgO, 2.55%, 3.12%, 2.89%, 2.72% K2O, 0.32%, 0.30%, 0.32%, 0.53% CaO, 5.86%, 6.06%, 7.14%, 6.60% Fe2O3, 207×10-6, 180×10-6, 213×10-6, 200×10-6 Rb, and 56×10-6, 49×10-6, 50×10-6, 32×10-6 Sr for the Setap Shale, Temburong, Belait and Trusmadi samples, respectively. The high Rb/Sr ratios of 3.8, 3.7, 4.2, and 6.1 are attributed to the lowest contents of Sr due to reducing conditions prevailing. The high Rb/K ratio sug- gests either brackish marine or rapid deposition that prevented equilibrium between Rb and K in the shales and ma- rine waters.