AGU2019, Evaluasi Isi sistem hidrotermal Lusi

Seri Ceramah/Kuliah Umum di Fakultas Geologi UNPAD, Maret 2019

ISU: Secara berkelanjutan fenomana Lusi terus mendapatkan perhatian di Dunia, dengan perkembangan terkini Lusi sebagai sistem hidrotermal pada sedimen merupakan hibrida antara mud volcano dari volkanisme sedimen dengan geyser gunungapi.

Judul dan Makalah Ilmiah online Lusi yang ditampilkan akan dipresentasikan lisan dan poster pada pertemuan tahunan EGU 2019 April 2019. Makalah LUSI merupakan rangkaian Kerjasama LUSI LAB (Konsorsium Eropa) bekerjasama dengan BPLS dilanjutkan PPLS sejak tahun 2018.

Merupakan koleksi Lusi library&Virtual Museum 2018 kelanjutan Web Lusi Library:Knowledge Managemen 2010 dibangun oleh Hardi Prasetyo, mantan Pimpinan BPLS 2007-207 merangkap “Sceintific Manager” melalui Lusi Research Network (LRN 2011).

Judul Sesi Khusus LUSI pada AGU 2019

Sistem-sistem hidrotermal  ke mud volcano: stuktur, evolusi dan pemantauan pada pembubungan aktiv dan purba

From hydrothermal systems to mud volcanoes: structure, evolution and monitoring of active and fossil piercements 

Ringkasan:

 

Sistem hidrotermal,  gunung lumpur, lingkungan hibrida (Hydrothermal systems, mud volcanoes, hybrid environments) seperti sistem hidrotermal pada sedimen dan struktur pembubungan (sediment-hosted hydrothermal systems and piercement structures) secara umum merupakan di antara fenomena geologis paling spektakuler di Bumi  ini.

Beberapa penelitian menunjukkan bahwa struktur tersebut telah memainkan peran kunci pada evolusi planet kita dan siklus kehidupan selama beberapa era geologis (in the evolution of our planet and the cycles of life during several geological eras).

Pembubungan aktif (Active piercements) biasanya ditandai dengan sistem pipa berakar dalam dan reaksi geokimia yang kompleks (y deep-rooted plumbing systems and complex geochemical reactions ) di mana kehidupan dapat beradaptasi untuk berkembang di lingkungan yang sangat ekstrim (where life can adapt to thrive in extremely harsh environments)  menjadikannya sasaran ideal untuk eksplorasi biosfer yang dalam (making them ideal targets for deep biosphere exploration). Sinyal geofisika yang terkait dengan lingkungan seperti itu seringkali ambigu dan sulit ditafsirkan.

Tekanan pori yang meningkat sering ditemui di kedalaman dan laju aliran yang tinggi *The elevated pore pressures often encountered at depth and the high flow rates) menjadikan struktur ini laboratorium alami yang ideal untuk menangkap prekursor peristiwa seismik dan secara dinamis memicu proses geologis (make these structures ideal natural laboratories to capture precursors of seismic events and dynamically triggered geological processes). Struktur pier cement sering dilaporkan untuk merespons gempa bumi dan pemaksaan dari luar (to respond to earthquakes and external forcing).

Sesi ini menyambut kontribusi dari studi geofisika, geokimia, mikroba, geologi, numerik dan laboratorium untuk mempromosikan pemahaman yang lebih baik tentang fenomena piercement yang purba dan modern. Secara khusus ditampilkan berbagai studi yang terkait denan:

1) penyelidikan mengendalikan struktur geologi yang sudah ada (investigations controlling pre-existing geological structures);

2) reaksi geokimia yang terjadi pada kedalaman dan di permukaan (he geochemical reactions occurring at depth and at the surface ) termasuk studi mikrobiologi (including microbiological studies);

3) penyelidikan sistem tersebut dengan metode geofisika;

4) studi eksperimental dan numerik;

5) survei dan pemantauan kedudukan dan lingkungan ini untuk mempelajari dinamika sistem yang punah dari yang aktif (to learn the dynamics of the extinct systems from the active ones);

6) studi piercement purba serta pengaruhnya terhadap iklim purba

 

 

Sumber: https://meetingorganizer.copernicus.org/EGU2019/orals/32736

Orals

GMPV3.4
Co-organized as BG4.6
Convener: Matteo Lupi Co-convener: Adriano Mazzini

 Orals 

Fri, 12 Apr, 08:30–10:15

 Posters 

Attendance Fri, 12 Apr, 10:45–12:30

Hall X2

Friday, 12 April 2019 | Room -2.91

Chairperson: Adriano Mazzini
08:30–08:45 |
EGU2019-2325
Highlight
Monia Procesi, Giancarlo Ciotoli, Adriano Mazzini, and Giuseppe Etiope
Geophysical Research Abstracts
Vol. 21, EGU2019-15421, 2019
EGU General Assembly 2019
.
Hydrothermal vent complexes acting as preferential fluid migration
pathway: a comparative study of the NE Atlantic and Indonesia
Ben Manton (1), Sverre Planke (1,2), John Millett (1), Dmitry Zastrozhnov (1), Adriano Mazzini (2), Philipp
Muller (2), and Reidun Myklebust (3)
(1) Volcanic Basin Petroleum Research (VBPR), Oslo, Norway (ben@vbpr.no), (2) Centre for Earth Evolution and Dynamics
(CEED), Department of Geosciences, University of Oslo, Norway, (3) TGS, Asker, Norway
Hydrothermal vent complexes are common in volcanic sedimentary basins world-wide. The vent complexes have commonly formed in edimentary basins affected by large igneous provinces due to widespread sill emplacement into organic-rich shales, which caused devolatilization in sill ureoles. The activity of these vents could have contributed to trigger drastic climate changes and extinction events through the Earth history. Continental break-up of the NE Atlantic during the Paleocene to earliest Eocene led to the formation of thousands of hydrothermal vent
complexes ultimately leading to the rapid climate changes of the Paleocene-Eocene Thermal Maximum (PETM).
Thousands of these hydrothermal vents are scattered within the Møre and Vøring basins where sills and connected vertical conduits are identified respectively as high amplitude reflections and chaotic reflection zones.
The north east Java sedimentary basin comprises potential modern analogues for fluid flow-related structures triggered by hydrothermal activity. The spectacular Lusi eruption, ongoing in north east Java since 2006, represents a unique modern analogue of the hydrothermal vent complexes from the geological past. Lusi is fueled by magmatic intrusions and hydrothermal fluids migrating from 4.5 km depth from the neighboring Arjuno-Welirang volcanic complex. Less than 10 km away from Lusi is the buried Porong structure. This kilometers-scaled vent is interpreted as the evidence of a similar palaeo hydrothermal vent activity characterizing the area.
Here we present a comparative study of these vent complexes based on 2D and 3D seismic data offshore Norway and onshore Indonesia.
The key features that characterize these hydrothermal vent systems are analyzed and compared within a broad context to investigate the mechanisms of fluids migration. The analyzed hydrothermal vents are characterized by distinctive eye-shaped geometries in the upper part, consisting of craters or depressions with mound-like geometries above.
The conduits between the sills and the vents are characterized by disrupted seismic reflections and surrounded by inward dipping reflections. The shallow amplitude anomalies are interpreted to be caused by gas due to their vertically clustered geometries, the ‘soft’ nature of some of the anomalies, and the widespread occurrence of gas in the basin. Mounds suggest that sediments were later remobilized due to fluid flow. These features occur directly above the vents, suggesting that fluids migrated preferentially through the underlying hydrothermal vent complexes. The interpreted fluid flow features show the importance of hydrothermal vent complexes for fluid overpressure development in basins and for potential migration of hydrocarbons from deep structures to shallow reservoirs. The shallow seismic anomalies furthermore suggest that the vent complexes have been reused for focused fluid flow for millions of years after their initial formation.
Ben Manton, Sverre Planke, John Millett, Dmitry Zastrozhnov, Adriano Mazzini, Philipp Muller, and Reidun Myklebust
09:15–09:30 |
EGU2019-18752
Álvaro Osorio, Guillaume Mauri, Adriano Mazzini, and Stephen Miller
09:30–09:45 |
EGU2019-15779
Alexandra Zaputlyaeva, Adriano Mazzini, Martin Blumenberg, Georg Scheeder, and Wolfram Michael Kürschner
09:45–10:00 |
EGU2019-18780
Karin Andreassen, Henry Patton, Sunil Vadakkepuliyambatta, Pavel Serov, Alun Hubbard, and Monica Winsborrow
10:00–10:15 |
EGU2019-7879
Ondřej Krýza, Petr Brož, Susan Conway, Jan Raack, Manish Patel, Matt Balme, Adriano Mazziny, Ernst Hauber, and Matthew Sylvest

Posters

GMPV3.4
Co-organized as BG4.6
Convener: Matteo Lupi Co-convener: Adriano Mazzini

 Posters 

Attendance Fri, 12 Apr, 10:45–12:30
Chairperson: Adriano Mazzini
X2.344 |
EGU2019-13878
Lena Ray, Bettina Scheu, Cristian Montanaro, Shane Cronin, and Candice Bardsley
X2.345 |
EGU2019-3608
Natalia Kharitonova, Anna Korzun, Ivan Bragin, Vasily Lavrushin, George Chelnokov, and Anna Demonova
X2.346 |
EGU2019-8835
Maren Walter, Andreas Türke, René Neuholz, Bernhard Schnetger, Jürgen Sültenfuß, and Sharon Walker
X2.347 |
EGU2019-12832
Guillaume Mauri, Matteo Lupi, Alesssandra Sciarra, Karyono Karyono, Stephen A. Miller, Riccardo Minetto, and Adriano Mazzini
X2.348 |
EGU2019-11159
Highlight
Adriano Mazzini, Alessandra Sciarra, Giuseppe Etiope, Alwi Husein, and Henrik Svensen
X2.349 |
EGU2019-17547
Alessandra Sciarra, Livio Ruggiero, Adriano Mazzini, Stefano Graziani, Giovanni Romeo, Giuseppe Di Stefano, Sabina Bigi, and Alwi Hussein
X2.350 |
EGU2019-312
Walter Menapace, Deborah Tangunan, Michael Maas, Christoph Vogt, and Achim Kopf
X2.352 |
EGU2019-12233
Di Luo, Feng Cai, Qing Li, Yunbao Sun, and Ang Li
X2.353 |
EGU2019-6091
Alexey L. Sobisevich, Irina N. Puzich, and Zalim I. Dudarov

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