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GEOLOGY AND STUDY FOR IDENTIFICATION soil geochemical mineralization at LOR AND

SURROUNDING AREA DISTRICT Suren TUGU - DAM , DISTRICT TRENGGALEK ,

EAST JAVA

by :

Hisham Mohammad Adnan

H1F009053

SARI

The research area includes several villages whose location is the border area between the District

and the District Dam Monument , District of Psychology , East Java . Regional geological studies have

spacious 16 km2 . Location specific studies conducted geochemical soil samples in the area Suren Lor

and Karangtengah taken by the method of 100x100 meter grid with intervals .

Geomorphological units of the study area consists of Hills Volcanics Unit and Unit Terdenudasi

Terdenudasi karst hills . Phase geomorphic study area is toward young adults . River flow pattern isdominated by a rectangular pattern and subdendritik , patterned dendritic fraction . Stratigraphic

study area can be divided into six lithologies that I Volcanics Breccia Unit , Andesite Lava Unit I, Unit

II Volcanic Breccia , Andesite Lava Unit II , Unit andesite intrusion , and Reef Limestone Unit . Rock

units in the study area was the Late Oligocene to Middle Miocene . The relationship between these

lithologies are aligned , but the relationship between the Unit Limestone reefs with other units are

not aligned . Geological structures that develop in the area of mapping is the dominant shear fault

motion . Suren Fault and Fault Karangtengah have the right sliding motion , while the fault that

formed later had left the sliding movement is Fault Corner , Masaran Fault and Fault Prambon .

Based on the analysis of the pilot soil geochemical (soil sampling ) threshold price obtained 0.021

ppm Au , Cu 69.74 ppm , 36.66 ppm Pb , Zn 104.75 ppm , 2340.15 ppm Mn , Hg 0.076 , 0.228 ppm As, and 2.87 ppm sb . Based on the distribution of geochemical anomalies obtained four Au prospect

area , there is an anomalous area of up to 10 ppm . element associations in the study area showed a

good relationship between the elements of the base metals Cu , Pb , Zn , and Mn . While Au showed

a correlation with Ag , As, and Sb . Anomalous distribution pattern obtained three quartz vein zones

that correspond to the distribution of anomalies that vein zone in the north, west , and east of the

site survey is relatively north-south trending and northwest- southeast .

Keywords : Psychology , geochemistry anomaly , Au , Suren Lor , soil sampling , threshold price .

Undergraduate Theses from JBPTITBPP / 2012-11-14 14:17:53Oleh : WAHYU NOVIAN SAPUTRA (NIM 12006054), S1 - Department of GeologyDibuat : 2011, dengan 7 file

Keyword :Karang Dalam, geomorfologi, stratigrafi, struktur geologi, sejarah geologi,geokimia

Lokasi penelitian terletak di daerah Karang Dalam dan sekitarnya, Kabupaten Lahat,Sumatera Selatan. Secara geografis daerah penelitian terletak pada koordinat UTM zona 48 S334000 mE 337500 mE dan 9572000 mN 9568500 mN, dengan luas daerah penelitiankurang lebih 12,25 km2 (3,5 km x 3,5 km). Geomorfologi daerah penelitian dapat dibagi

menjadi tiga satuan geomorfologi, yaitu Satuan Perbukitan Kompleks, Satuan PerbukitanVolkanik, Satuan Dataran Banjir dan Teras. Stratigrafi daerah penelitian terdiri atas empat

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satuan batuan tidak resmi, berturut-turut dari tua ke muda adalah Satuan Batupasir, SatuanBatulempung, Satuan Breksi Volkanik dan Satuan Aluvium. Struktur geologi yang terjadi

pada daerah penelitian adalah kemiringan lapisan berarah timurlaut baratdaya dan tigasesar mendatar yang berarah baratlaut tenggara. Pada Tengah Miosen Awal (N7)diendapkan satuan batupasir Formasi Gumai pada lingkungan neritik tengah - luar, yang

diikuti dengan pengendapan secara selaras oleh satuan batulempung pada periode akhirMiosen Awal dengan lingkungan pengendapan neritik tengah. Setelah itu, terjadi tektonikkompresi pada Pliosen berarah utara - selatan yang mengakibatkan terjadinya sesar mendatardi daerah penelitian berupa Sesar Puntang, Sesar Kuba dan Sesar Asam. Setelah itudiendapkan satuan Breksi Volkanik pada Kuarter. Pada masa sekarang terdapat satuan aluvialyang diendapakan secara tidak selaras diatas satuan batupasir dan batulempung. Pada daerah

penelitian terdapat analisis geokimia satuan batulempung Formasi Gumai. Analisis geokimiadilakukan pada sampel KDL-09 dan LMT-11. Interpretasi geokimia berupa plot antara HIdengan Tmax menunjukkan bahwa sampel LMT-11 telah mencapai kematangan termal dantelah berada pada oil zone. Hal ini menunjukkan potensi Formasi Gumai sebagai batuaninduk pada sistem petroleum Cekungan Sumatera Selatan.

Deskripsi Alternatif :

The research area is located administratively at Karang Dalam village, Lahat Regency,South Sumatera Province and geographically at UTM zone -48 334000 mE 337500 mEand 9572000 mN9568500 mN, which covers area around 12,25 km2 (3,5km x 3,5 km).Geomorphological units in the research area are divided into three units, that are Complex

Ridge, Terrace and Flood Plain, Volcanic Ridge Units. The research area is divided into fourstratigraphy units from the oldest to the youngest in age, which are Sandstone unit, Claystoneunit, Volcanic Breccias Unit, and Alluvium Unit. Geological structures which can be

identified are northwest-southeast dipped beds, three strike slip faults with northeast-southwest orientation. Geological history of the research area was started in Early Miocenewith the development of South Sumatera Basin, which was indicated by deposition ofSandstone Unit Gumai Formation in Midlle Early Miocene (N7) that bed was deposited inmiddle - outer neritic, subsequently Claystone Unit of Gumai Formation was depositedduring Late Early Miocene(N8). Then a tectonic compression happened during Pliocene withtrend north - south which caused the development of strike slip fault in the surrounding areas

such as Puntang Fault, Kuba Fault, Asam Fault. Then during quarter there is a deposition ofvolcanic breccias. Present days alluvium unit deposited on the Sandstone Unit and ClaystoneUnit, along Lematang River. There aregeochemistrydata gathered in the research area, in

claystone unit Gumai Formation. Geochemistryanalysis data taken from sample code KDL-09 and LMT-11. Geochemistryinterpretation from HI vs Tmax graphic show that LMT-11has been mature in the oil zone. This data show that Gumai Formation role as a source rockin the South Sumatera Basins petroleum system.

Undergraduate Theses from JBPTITBPP / 2012-11-13 14:19:45Oleh : KEVIN CHANNEL (NIM 12005032), S1 - Department of GeologyDibuat : 2011, dengan 8 file

Keyword :geotermal, Batur, geokimia, tanah, boron.

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Geomorfologi Kubah Lava, Satuan Geomorfologi Dataran Volkanik, dan SatuanGeomorfologi Perbukitan Volkanik. Stratigrafi daerah penelitian terbagi ke dalam limasatuan batuan, yaitu dimulai dari yang tertua hingga ke termuda yaitu Satuan Lava AndesitPangamunamun, Satuan Lava Andesit Jimat, Satuan Lava Andesit Nagasari, Satuan LavaAndesit Pekandangan, dan Satuan Jatuhan Piroklastika Batur. Pada daerah penelitian terdapat

lima kawah dimana empat diantaranya menunjukkan arah kelurusan ke utara dan sebuahSesar Turun Sumberejo berarah N 14o E. Studi geokimia tanah dilakukan di sekitar KawahTimbang, Dataran Tinggi Batur, Kabupaten Banjarnegara, Jawa Tengah. Dari 128 sampeltanah yang diambil, 22 sampel tanah horison A dan 12 sampel tanah horison B dianalisis.Dari 22 sampel tanah dari horison A yang telah dianalisis, nilai boron daerah penelitian

berkisar antara 106,80 hingga 557,37 ppm, merkuri antara < 4,0x10-4 hingga 1,6x10-3 ppm,pH tanah antara 4,98 hingga 6,72, dan temperatur tanah antara 12,4 hingga 16,5 C.Berdasarkan pada hasil analisis geokimia tanah, berikutnya dibuat peta penyebaran unsur

boron, temperatur tanah, dan pH di sekitar Kawah Timbang. Berdasarkan pada peta-petatersebut, didapat kemungkinan kehadiran dua rekahan yang dengan rekahan pengontrolkawah-kawah yang disebutkan sebelumnya.

Deskripsi Alternatif :

Geomorphologically, the study area consists of three geomorphology units, namely: LavaDome Unit, Volcanic Plain Unit, and Volcanic Hills Unit. Stratigraphy of the study area isdivided into five units (from the oldest to the youngest): Pangamunamun Andesite Lava Unit,

Jimat Andesite Lava Unit, Nagasari Andesite Lava Unit, Pekandangan Andesite Lava Unit,and Batur Pyroclastic Fall Unit. In the study area, five craters are found and four of them

shows a lineament to the north and a strike with a trend of N 14o E. The soilgeochemistrystudy was held around Timbang Crater, Batur Plateau, Banjarnegara District, Central Java.

From 128 soil samples, 22 soil samples from A horizon and 12 soil samples from B horizonwere analyzed. From 22 samples taken from horizon A which had been analyzed, boronranges from 106.80 to 577.37 ppm, mercury ranges from < 4.0x10-4 to 1.6x10-3 ppm, pH of

soil ranges from 4.98 to 6.72, and the soil temperature ranges from 12.4 to 16.5 C. Basedon the soilgeochemistryanalysis, boron, soil temperature, and pH distribution map weremade. As a result, there are indications of two fractures which are different with the fracturethat controled the other craters mentioned before.