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Journal : KURVATEK

GEOMETRI PERLAPISAN BATUPASIR KONGLOMERATAN SEBAGAI SISIPAN PADA FORMASI NANGGULAN DI KALI WATUPURU DAN KALI SONGGO, PEGUNUNGAN KULON PROGO, YOGYAKARTA siti nuraini
KURVATEK Vol 2 No 2 (2017): November 2017
Publisher : Institut Teknologi Nasional Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33579/krvtk.v2i2.543

Abstract

Nanggulan  Conglomeratic  Sandstone  is  one  of  important  part  of     Nanggulan  Formation  which  is deposited during   Middle Eocene to early Late Eocene (Saputra & Akmaluddin, 2015) or Late Oligocene (Rahardjo, 1995). The grain composition of Nanggulan conglomeratic sandstone  is characterized by various rock fragments (metamorphic, igneous, sedimentary rocks) which mixture up to fine to coarse sand-sized matrix. Other materials present within the Nanggulan conglomerathic sandstone are shell fragments, coal remains, siderithic concretions which is deposited within high energy condition. Geometry of conglomeratic sandstone  stratification is still being  a question  among the researchers  due to discontinuous  sand body character.   To study external form of sandstone body needs to combine with internal characters such are grain texture, grain or fragment composition, sedimentary structures to predict a depositional facies. This research is dedicated to study the character of the Nanggulan conglomeratic sand body. Field geological observation was conduct to two rivers i.e Kali Watupuru and Kali Songgo where transecting the Nanggulan beds.  The  grain  or  fragments  concentration  of  Nanggulan  conglomeratic  sandstone  displays  in  various condition for example lying above an erosional surface to the bottom position, or concentrate to the upper layer. It also appears to be engaged in coarser size matrix, or displays a dense grain composition to elsewhere. Geometry of the Nanggulan conglomeratic sandstone represents a lens geometry  which pinching-out to the edge of body.   However, to the top of lens geometry were found steep joints cross cutting the sand layers. Initial geometry of Nanggulan conglomeratic sandstone indicates a channel fill shape due to filling sediments into the erosional feature of underlying beds. When lithification and compaction process occurred along the burial and uplifting tectonic phase, a channel fill geometry becomes lens geometry. Bulging to the centre part and thinning to the edge of sandstone body, is caused by differential compaction process. Lens geometry is believed as one example of structural trap model for sandstone reservoir. The occurrences of vertical joints to the Nanggulan conglomeratic sandstone need to be considered as seal potential within clossure trap or even more causing hydrocarbon leakings.  If development of vertical joint occurs along migration process, it may be potentially leak. However, if joints already sealed parts of hydrocarbon pool may create a compartmentalization  reservoir  body.  By  doing  this  investigation  could  predict  an  advance  reservoir modelling study using outcropp analogues.   Keyword: Nanggulan conglomeratic sandstone, lens geometry, sandstone body.
TIPE INTERVAL T2- HUMMOCKY PADA ENDAPAN BADAI (TEMPESTIT), FORMASI NANGGULAN, PEGUNUNGAN KULON PROGO, YOGYAKARTA Nuraini, siti; Syafri, Ildrem; Muljana, Budi; Sudradjat , Adjat
KURVATEK Vol 10 No 2 (2025): Energy Management and Sustainable Environment
Publisher : Institut Teknologi Nasional Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33579/krvtk.v10i2.5800

Abstract

The composition of storm deposit layers (tempestites) is described as a normal sedimentary deposit or fining upward-deposit, divided into 3 units: the lower part, the middle part, and the upper part. The lower part is characterized by coarse clastics, the middle part known as T2 consists of a combination of hummocky and swalley layers containing finer clastics with good sorting. The upper part shows deposition of layering in increasingly calm current conditions with fine clastics: clay. The T2 interval is often considered a characteristic of turbidite deposit models due to gravity flow. However, on the other hand, the nature of storm-induced currents (hummocky-swalley) is more varied due to the role of 3 controlling currents: oscillatory currents, bottom currents, and combined currents. This study will investigate the characteristics of storm interval T2 (tempestites) in the Nanggulan Formation. The method applied is to generate stratigraphic sections for 3 sections (Kali Clumprit, Watupuru, and Songgo), age correlation and of paleocurrents analysis. Storm deposits are found in the Middle Eocene-aged Nanggulan Formation, showing a polymodal direction with opposing and branching within T2 interval. This pattern reflects two opposing directions: bottom currents and storm oscillatory currents. On the other hand, a combination current emerges, branching off from the main current pattern. The T2 Watupuru layer consists of overlapping hummocky layers that extend in a northwestward direction, indicating an ancient coastal or land area.
Co-Authors -, Kardiyem A., Riski Isminar Aan Sutandi Abdul Mufid Adelia Dwi Sagita Adelina Butar Butar, Bellinda Adha, Nurul Adlin Resa Purwatih Ady Kusuma, Gusti Ngurah Afriyanto, Verdyan Nur Aghivirwiati, Gusti Ayu Agung Dian Putra Ahmad Jaenudin Al Ramadani, Muhamad Iqbal Al Rasyid, M. Harun Aldo Alfiando Alfin Wahyu Saputra Ali Akbar Alifka Ramadani, Sela Alnur, Rony Darmawansyah Amelia, Nia Amin Ananda Patuh Padaallah Anggi Maulana Anis Humaidi Aos Kuswandi Aprilia Sarwani, Audi Apriliyani, Resti Aprizal, Yopi Ary Setya Budhi Ningrum Asep Miftahul Falah Asumah, Yayu Ayudhia Rachmawati Azizah Nur Syahbani Badi'ah Bekti Galih Kurniawan Brata, Yat Rospia Budi Muljana Carolina Sasea, Sanita Chasan, Shofa Daffi Maulany, Ahmad Dari, Ulan Dayu RikaPerdana Deddy Kurniawansyah, Deddy Devi Angeliana Kusumaningtiar Deviyanti Pangestu Dewi, Aliana Dian, Susi Diansanto Prayoga Dwi Puji Astuti Dwitha Nirmala Erni Erni Erni Fadila, Anjelita Anjas Fadillah, Widia Nurul Fanni Rahmawati Faroha, Shinta Nailul Fauzia Apriyanti, Fiki Zahara Felicia Tria Nuciferani Ferdy . Ferianto Ferianto Fikri, Muhammad Ali Habibie, Roy Kembar Harianto, Feri hartawan, hartawan Hartono, Rina Susanti Hasan, Wiwi Wulandari Hasbiah Hermi Yanzi I Gusti Ayu Desi Saryanti, I Gusti Ayu Desi Ika Setiyarini Ildrem Syafri Ilham Ilham Ina, Ina Irawan Suntoro Irwanto Irwanto Iwin Arnova Izzato Millati Jayanti Dian Eka Sari, Jayanti Dian Jessica Elvira Thanos Jusmala Sari Karim, Ulfah Nuraini Karnia, Nia Kasmir Kasmir, Kasmir Kembar Habibi, Roy Khairul Azwar Khamdiyah, Siti Khasan Setiaji Khusnik Hudzafidah Kumanireng, Theresia Chelsea Larasati, Indah Lubis, Nikmah Lusi, Lusi Lyesmaya, Dyah M. Bayu Firmansyah, M. Bayu M. Makbul M. Zahari Marsudi, Kenlies Era Rosalina Marudut G, Pusar Masyhuri Majiding, Chaidir Maulana, Ripal Michael Hasugian Mila Kusuma Wardani Miranda Abung Moh Imam Al Ghofiqi Moh. Zubair Muhamad Fazri Muhammad Fadil Muhammad Luthfi Muhammad Nur Ali MUHAMMAD YUSUF Mukti, Giri Mukti, Hartati Munafiah, Nida'ul Mupangati, Yudo Murti Murni Winarsih N. Nurjanah Nabila, Hanifatun Nabilah, Mabel Nabilla Nabilla Nabillah, Nur Annisa Nanik Handayanti, Ni Putu Niken Larasati NUR FITRIANI Nur Husna Wahida Nur Oktaviani, Malika Nur Rochimah Nurhadiah Nurhadiah Nurhalisah, Alya Nurmeta, Irna Khaleda Nurul Sa’diyyah, Zulfanida Nurwahidin, Muhammad Nyoto Suseno Perdana, Dayu Rika Perdhana, Langgeng Poppy Laksita Rini Purwatih, Adlin Resa Purwiro Harjati Rachmawaty Rachmawaty, Rachmawaty Raden Mohamad Herdian Bhakti Raharjo, Teguh Hardi Rahma Nabilla, Hanifah Rahmadani, Azmi Rahmatun Husnul Hikmah Aulia Ramadhina, Khalida Alifia Ramadya Vintika Laras Ramdani , Teguh Rapani Rapani Ravli Saputra, Ardi Rindu Bintara, Devi Kelana Riski Isminar A. Riski Putrikusumaningsih Risky, Risky Rismawati Riswandi Riswandi Riswanti Rini riswanto riswanto Rochminah Rohmah Ageng Mursita, Rohmah Ageng Rosalia Hadi Rosidah, Ilmiyatur Rosmania, Rosmania Rufiatun, Yayuk Sabila, Anisa Nur Saeful Mizan, Saeful Sagita, Ahmad Danang Saiful Bahri Saputri, Rinda Zelni Saragih, Eka Desnawati Septia, Dini Septinawati, Septinawati Seriwanti, Seriwanti Setiawan, Stephanie Debby Shady Kurnia Pratama Shafa’ Annisa Puspasari Shavira Nafa Dilla Shofa Chasani Sholihuddin, Ahmad Silfani, Silfani Siti Choiriyah Siti Fatimah Siti Komariyah Sofyan Anif Sowiyah Sowiyah Sri Hayati Sri Rahmayanti, Sri Sri Wahyuni Sudarto Sudarto Sudradjat , Adjat Sudrajat sudrajat Sukartono Sukmawati, Ari Sulistiyani, Tina Supriyanto Supriyanto Suraiya Suraiya Suryawati, Andari Tri Syabuddin Syahbani, Azizah Nur Syahdina, Aang Syahindah Purnama Gusnia Syifa’ul Lailiyah T Marwan Nusri Thafaki Mafrudha Ahdiyaka Totok Bintoro Toyyibah Ulandari, Ulandari Upik Pebriani Veta Lidya Vita Andriani Wahyudi, Putri Winda Wahyuningsih, Sila Sakti Sri Walid, Ahmad Firgian Yanti, Hanida Yanto Supriyatno Yasir Sidiq Yuliana, Chelsi Yuniar Yuniar Yunita Sari Yurista, Weda Zakiyah Zakiyah Zubaidah Zubaidah