Introduction The occurrence of iron nodules, concretions and iron sheets and secondary iron beds are quite common as a result of chemical weathering in tropical climate. ~ga jenis besi sekunder dapat dikenaZi iaitu: besi seZaras~ besi pengisi retakan dan besi memperjeZaskan struktur. Sifat batuan bertuf yang tinggi kandungan besi dipercayai menggaZakkan mobiZasi dan nyahZarut besi dan kemudiannya tertahan oZeh Zapisan sedimen tidak teZap air~ menghasiZkan pengumpuZan besi sekunder ini. Lapisan besi sekunder ini yang berketebaZan antara beberapa cm hingga mencapai 0.4 m terbentuk secara seZaras~ di antara atau menyiZang perZapisan. Kehadiran Zapisan besi sekunder yang terbentuk di daZam batuan Formasi Seman tan teZah dikaji. The deveZopment of the Zatter type enhanced and preserved some of the important primary and secondar-y structures~ rendering them to be observabZe in highZy weathered roak exposures. Three types of secondary iron can be recognised~ they are conformabZe iron~ fracture-fiZZing iron and structure enhancement iron. Later~ the Zeached iron is impeded by the impervious sediments~ thus forming a smaU reservoir for iron to accumuZate and eventuaZZy~ depending on the prevaiZing Eh and pH conditions~ soZidify or harden. The tUffaceous sediment~ with reZativeZy high iron content is beZieved to have been invoZved in the mobiZization and Zeaching of iron. The iron Zayer ranges from about severaZ am to about 0.4 meter thick~ and deveZoped comformabZy within~ in between and across the beddings. The nature of occurrence of secondar-y iron over a stratigraphic coZumn of the Semantan Formation has been studied. Desa, Ibrahim Komoo and Che Aziz Ali, Jaba tan Geologi, Uni versi ti Kebangsaan Malaysia, Bangi. Printed by Art Printing Works Sdn.ĬAT ATAN GEOLOGI ( GE 0 LOG I CAL NOT E S ) THE OCCURRENCE OF VARIOUS TYPES OF SECONDARY IRON IN THE SEMANTAN FORMATION (KEHADIRAN PELBAGAI JENIS BESI SEKUNDER DALAM FORMASI SEMANTAN) Kadderi Md. PubLished by the GeoLogicaL Society of MaLaysia~ Department of University of MaLaya~ 59100 KuaLa Lumpur (TeL. PetroLeum Research Juruodit Kehormat (Honorary Auditor) Universiti Pertanian MaLaysia Nik Ramli Nik Hassan Universiti Kebangsaan MaLaysia Ahli-ahli Maj1is 1990-91 (Councillors 1990-91) GeoLogicaL Survey MaLaysia Tan Teong Hing Presiden Yang Dahulu (Immediate Past President)Īhli-ahli Majlis 1990-92 (Councillors 1990-92) Penolong Setiausaha Kehormat (Honorary Assistant Secretary) Majlis (Council) 1990/91 Pegawai-pegawai (Officers) Presiden (President)Īhmad Said Choo Mun Keong Jimmy Khoo Kay Khean PERSATUAN GEOLOGI MALAYSIA (GEOLOGICAL SOCIETY OF MALAYSIA) PERTEMUAN PERSATUAN (Meetings of the Society) Sriyanee de Silva: Diagenesis of the Old Red Sandstone - an exampl e from the Orcadian Basin, SE Shetland Islands HanlZah Mohamad: Rare earth elements di stribution in some in silll Malaysian granitic so il sīERITA-BERITA PERSATUAN (News of the Society) Keahli an (Membership) Wanted: Current add ress of 2 members Pertukaran Alamat (Change of Address) Pertamba han Baru Perpustakaan (New Library Additi ons)īERITA-BERITA LAIN (Other News) Katalog buk u-buku bermutu DBP Postponement of GEOSEA VII Thailand Proceedings GEOSEA VI - li st of papers rGCP Ma lays ia - News letter I (January, 1990) Persidangan Sains Bumi dan Masyarakat Comparati ve System s Tracts Analys is in Carbonate and Sili cicl astic Depositi ona l Systems IGCP Project 274 - Coastal evo luti on in the Quatelllary International Conference of Rare Ea rth Mi nera ls and Minerals for Electronic Uses International Geology Conference - Basin modelling: Advances and appli cations Regiona l Training Cou rse on Groundwater Exploration and Assessment 199 1 AAPG 75th Ann iversary Annual Meeting Kursus-kursus Lati han & Bengkel-bengkel (Courses & Workshops) Kalendar (CaJendar) Desa, Ibrahim Komoo & Che Aziz Ali: The occurrence of vari ous types of secondary iron in the Semantan Formation (Kehad iran pelbaga i jeni s besi sek under dalam Form asi Seman tan) 16, No.1)ĬATATAN GEOLOGI (Geological Notes) Kadderi Md. EWSLETTER OF THE GEOLOGICAL SOCIETY OF MALAYSIA Jil.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |