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Buletin Sumber Daya Geologi
Published by Pusat Sumber Daya Mineral Batubara dan Panas Bumi
ISSN : 19075367     EISSN : 25801023     DOI : -
Core Subject : Science, Education, Social, Engineering,
Education Energy Engineering Environmental Science
uletin Sumber Daya Geologi merupakan Makalah berkala ilmiah terakreditasi LIPI bidang mineral, energi fosil, dan panas bumi. Makalah ini terbit tiga nomor dalam satu tahun pada bulan Mei, Agustus dan November. Pada Tahun 2010, Buletin Sumber Daya Geologi mendapat Akreditasi B sebagai majalah Berkala Ilmiah, kemudian akreditasi ulang Tahun 2012, dan akreditasi terbaru di Tahun 2015 untuk tiga tahun kedepan dengan nomor ISSN (print) : 1907-5367. Tahun 2017 Buletin Sumber Daya Geologi mendapatkan nomor eISSN : 2580 - 1023 untuk versi onlinenya.
Arjuna Subject : -
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Search results for , issue "Vol 15 No 1 (2020): Buletin Sumber Daya Geologi" : 1 Documents clear
KARAKTERISTIK MINERAL LEMPUNG HASIL UBAHAN PADA SUMUR LW-1 DAN LW-2 DENGAN MENGGUNAKAN METODE DIFRAKSI SINAR-X PADA SISTEM PANAS BUMI GUNUNG LAWU: THE CHARACTERISTICS OF CLAY MINERAL ALTERATION FROM WELLS LW-1 AND LW-2 USING X-RAY DIFFRACTION METHOD IN THE MOUNT LAWU GEOTHERMAL SYSTEM Permana, S.T., M.T, Lano Adhitya; Sastrawijaya, Candra Widya; Hermawan, Dudi
Buletin Sumber Daya Geologi Vol 15 No 1 (2020): 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.v15i1.293

Abstract

The LW-1 and LW-2 geothermal wells are located in the depression zone between Mount Lawu and Mount Jabolorangan contain rocks that are hydrothermally alterated as indicated by the presence of alteration minerals that are classified as argillic to advanced argillic alteration. To determine the character of the altered minerals that were formed, especially the presence of clay minerals in LW-1 and LW-2 wells, a study of clay minerals is required using the X-Ray Diffraction approach. This study aims to determine the presence and characteristics of clay minerals in LW-1 and LW-2 also their correlation to the formation of a geothermal system in the Gunung Lawu area. The analysis and interpretation using XRD method in LW-1 and LW-2 wells shows that within the temperature increases the crystal shape of the clay minerals becomes more perfect which is represented by a smaller degree of crystallinity. Whereas the effect of grain size on the XRD pattern shows that the crystallinity of the clay minerals tend to decrease with increasing grain size. The altered clay minerals in LW-1 and LW-2 wells consist of smectite, illite, kaolinite and halloysite which can be acted as caprock in the Mount Lawu geothermal system.

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