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Kurnia
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Journal : Buletin Sumber Daya Geologi

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KAOLINITISASI DAN MOBILITAS UNSUR TANAH JARANG PADA PROFIL PELAPUKAN BATUAN GUNUNGAPI DI PUNCAK MANDEH, SUMATRA BARAT: KAOLINITIZATION AND RARE EARTH ELEMENTS MOBILIZATION OF A VOLCANIC ROCK WEATHERING PROFILE IN PUNCAK MANDEH, WEST SUMATRA Irzon, Ronaldo; Kurnia; Sendjaja, Purnama; E. Setiawan, Verry
Buletin Sumber Daya Geologi Vol. 16 No. 1 (2021): Buletin Sumber Daya Geologi
Publisher : Pusat Sumber Daya Mineral Batubara dan Panas Bumi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47599/bsdg.v16i1.312

Abstract

The weathering process occurs on the Earth's surface, especially in tropical climates, and causes the parent rock's mobilization of elements. Weathering is interesting because it is often associated with the enrichment of economic materials such as iron, alumina, and REEs. The weathering profile of Tertiary volcanic rocks is spread across tropical Sumatra. This study aims to describe REEs' kaolinization and mobilization process on the weathering profile of volcanic rocks in the east of Mandeh Peak, West Sumatra. XRF and ICP-MS devices are utilized to measure the abundance of major oxides, trace elements, and REEs. The increase in IOL is proven to occur in the same direction as weathering levels. A triangular diagram of SiO2-Al2O3-Fe2O3T indicates kaolinization on weathering at Mandeh Peak. Feldspar and mica were prone to weathering and instantly turn into kaolinite in the early stages of weathering to explain the main oxide variations in weathering profiles. The weathering process has increased the amount of alumina and iron significantly relative to the parent rock. There is no REEs enrichment on any of the weathering horizons other than its composition on the parent rocks. Part of Ce is oxidized into Ce4+ and left on the saprolite horizon. This condition makes Ce's mobility in the direction of weathering level is different from other REEs.
Co-Authors Abdul Wahab Adine Setya Wardhani Agus Wibowo Agus Wiyono Ahmad supriatna Anasrullah, Aldi Apriliani, Ragita Ariansyah T Ashelawati, Brigitta Desteni Asty Pawellangi, Andi Lutvia Benius Benu, Imanuel Budiandriani, Budiandriani Candra Purnawan Cesar Rafelino, Kevin Chairil Anwar Christy, Naomi Stephanie Cryshanti Febri Cut Nelly Dami Dato, Twenfosel O. Dedek Zulvira Dian Ikha Pramayanti E. Setiawan, Verry Edi Pramono Edward Mandala EKO YULIANTO Endiyani Faisal Syahputra HARYANTO Hatipah Heri setiawan Hikmah, Khoirunnisa Durotul Humeira Husna Ika Rezvani Aprita Indah Permata Sari Indah Permatasari Irhami Ismi Nur Faizah Kaharap, Joni Tito Kasjim Salenda Khoiriyyah Kurnia Sari, Fera Kurniawan Laeliyah Kodriatul Fadillah Lilis Suryani MAGHFIRAH Maghfirah Maghfirah Marhawati, Marhawati Marlina Masyitah Meilinda Anisa Dewi Miftahul Rizqi Mizar Liyanda MUHAMMAD DINAR Muhammad Hasan Muhammad Muhammad Muhammad Muslih Muklis Mulyanti MUSTARI Mutiara Neneng Mariah NENG SURYANTI NENGSIH Ni Putu Eka Devi Meyrani, Pande Nia Kusstianti Nilfatri Ninit Megalia Pransisca Nur Septia Dewi Saputri Nur Tahtiyah Nurhasanah Nurhatijah Nurhayati, Betty Nurrahmayani Nurul Kemala Dewi Nurul Najmi Nurviana Octaverina Kecvara Pritasari Ori Marlinda Ozi Adi Saputra, Ozi Adi Pandu Putra Darmawan Pramayanti, Dian Ikha Pujiasih, Septi Putri Fansa Barawas Rachmadani, Budi Rachmat Hidayat Rahmaton Hayati Rayandra Asyhar Reni Agustiani, Reni Rifqi Khaerul Rahman Rina Puspita Sari Rizki, Vanani Nur Ronaldo Irzon Rossy Azhar Salahudin Salahudin Saputra, Dede Saudah Sayuti Selviae Sendjaja, Purnama Sri Agustina Sri Sukapti, Woro SUHARSONO Sulaiman, Erman Suraiya Nazlia Suri Purnama Febri Suriyanti Susbiyantoro, Susbiyantoro Tri Lestari, Andi Ulan Agustina Utami, Cecilia Putri Wahdan Arum Inawati Wita, Flazas Wulandari, Rai Desi Yulianto Zahra Maulidia Septimar Zulvia Maika Letis