All ICDP Publications with Abstracts
From parent-sysfolder "Publications" + 2 folder-levels deep
2919.
Investigation of orbital and sub-orbital Milankovitch cycles from borehole logging data: Examples from Cretaceous and Quaternary lake sediments
Past Global Changes Magazine,
32
(2)
88-89
2024
2918.
International Continental Scientific Drilling Project of the Songliao Basin: Terrestrial Geological Records of the Cretaceous Dinosaur Age
Earth Science Frontiers,
31
(1)
511 – 534
2024
Keywords:▾
Climate change; Earth (planet); Infill drilling; Petroleum prospecting; Sea level; Sustainable development; Basin; Chronostratigraphic framework; Continental scientific drillings; Cretaceous; Drilling projects; International continental scientific drilling program; Marine incursion; Marine incursion event; Pa-leoclimate; Songliao; Greenhouses
Abstract: ▾ Over the past century global temperatures continue to rise, and the Earth may enter a greenhouse period in the future with no ice at the poles. The Cretaceous was a typical greenhouse period in deep time, and thus understanding the Cretaceous climate is significant for interpreting past climate changes and predicting future trends. The International Continental Scientific Drilling Project of the Songliao Basin is the world's first continental scientific drilling project to penetrate the Cretaceous continental strata within the framework of the ICDP. This project is aimed to investigate Cretaceous terrestrial climate and environmental changes, and to explore the mechanisms of massive terrestrial organic matter accumulation and enrichment. Spanning 16 years, this project achieves a continuous and complete 8187-meter core with a recovery rate exceeding 97%, establishes a high-precision chronostratigraphic framework for the Cretaceous continental strata in the Songliao Basin, reconstructs multi-temporal-scale terrestrial climate cycles and climate events during the Cretaceous period, reveals the mechanisms of Cretaceous sea-level fluctuations, and confirms marine incursion events in the Songliao Basin. The International Continental Scientific Drilling Project of the Songliao Basin has promoted global collaboration among geologists to study Cretaceous greenhouse climates, leading to a series of high-impact research achievements. It has provided crucial scientific support for the sustainable development of oil and gas exploration in the Songliao Basin, and has generated significant social benefits and substantial international and domestic influence. The International Continental Scientific Drilling Project of the Songliao Basin represents a milestone stage in exploring deep-time Earth, and it is foreseeable that in the future, humans will continue enhancing the understanding of deep-time climate and environmental evolution with the aid of scientific drilling. © 2024 Science Frontiers editorial department. All rights reserved.
2917.
International Continental Scientific Drilling Program (ICDP) workshop on the Fucino paleolake project: The longest continuous terrestrial archive in the MEditerranean recording the last 5 Million years of Earth system history (MEME)
Scientific Drilling,
33
(2)
249 – 266
2024
2916.
Internal structure of the volcanic island of Surtsey and surroundings: Constraints from a dense aeromagnetic survey
Journal of Volcanology and Geothermal Research,
451
2024
2915.
Interaction between basement detachment fault, rift onset unconformity, and overlying basin fills: An example from the Songliao basin of a Cretaceous active continental margin volcanic rift in northeast Asia
Marine and Petroleum Geology,
168
2024
2914.
Precipitation variability and environmental change across late Quaternary glacial-interglacial cycles in lowland Central America: Insights from Lake Petén Itzá (Guatemala) sediments
Quaternary Science Reviews,
344
2024
2913.
Integrated Rock Mass Characterization of the Lower Continental Crust Along the ICDP-DIVE 5071_1_B Borehole in the Ivrea-Verbano Zone
Geochemistry, Geophysics, Geosystems,
25
(12)
e2024GC011707
2024
Keywords:▾
rock physics, well logging, Ivrea-Verbano zone, rock mass characterization, lower continental crust
Abstract: ▾ Abstract The first borehole 5071_1_B of the ICDP-Drilling the Ivrea-Verbano zonE (DIVE) project in Italy, which intersects the Massone antiform, provides a unique opportunity to integrate downhole geophysical measurements with observations from 100% recovered drill core in rarely drilled lithologies. The objective of this study is to petrophysically and structurally characterize the rock mass and constrain factors influencing the seismic velocity in the lower continental crust. A comprehensive data set, comprising core, well log and vertical seismic profiling data, was collected. The structural analysis indicates that the axial plane of the intersected tightly folded antiform is slightly tilted at the borehole location and thus the borehole intersects the hinge zone at the top and its limb in the lower part of 5071_1_B. Numerous open natural fractures with variable dips and two dominant dip azimuthal orientations are identified along the borehole, which affect the electrical and acoustic properties. The velocities at the core, well log and seismic scale are consistent but lower than intrinsic seismic velocities of the lower continental crust, since they are not only affected by fractures but also by micro cracks at the 5071_1_B in situ conditions. A systematic lithology correlation is not evident for these properties. However, a cluster analysis of gamma ray and magnetic susceptibility logs shows an excellent agreement with the logged core lithologies in the presence of remarkable spatial variability. Furthermore, the main lithologies are grouped into three distinct clusters, suggesting two types of kinzigites with distinct magnetic and radiogenic properties.
2912.
Precambrian impact structures and ejecta on earth: A review
Precambrian Research,
411
2024
2911.
Technical status and development suggestions of extra‑deep scientific drilling equipment (in Chinese with English abstract);[特深科学钻探装备技术现状与发展建议]
Drilling Engineering,
51
(04)
14-22
2024
2910.
Progress and prospect of the Chinese Continental Environmental Scientific Drilling (CESD) program
Past Global Changes Magazine,
32
(2)
104-105
2024
2909.
The Barberton Drilling Project's Buck Reef Chert core BARB3 – Sedimentary facies and depositional environment of a 3.4 Ga marine platform succession
Precambrian Research,
414
2024
2908.
In situ stress state of deep basement in the Songliao Basin: Evidence from in situ stress measurement in SK-2 borehole; [松辽盆地深部基底地应力状态: 来自松科2 井地应力实测数据的证据]
Earth Science Frontiers,
31
(2)
377 – 390
2024
2907.
Superhot Geothermal - Experience and Outlook in Iceland
Volume 48
,
Page 2974 – 2983
2024
2906.
Workshop report: Afar Dallol Drilling - ONset of sedimentary processes in an active rift basin (ADD-ON)
Scientific Drilling,
33
(2)
207--218
2024
2905.
Vegetation response to climate changes in the eastern Arctic during the Middle Gelasian age of the Early Pleistocene
Review of Palaeobotany and Palynology,
324
2024
Keywords:▾
Arctic; Chukchi; Elgygytgyn Lake; Russian Federation; climate change; glaciation; interglacial; isotopic analysis; marine isotope stage; paleobotany; palynology; Pleistocene; pollen; vegetation cover
Abstract: ▾ Palynological analysis of sediments from El'gygytgyn Lake document vegetation changes in the Eastern Arctic from early marine isotope stage (MIS) 74 to late MIS 80 (c.2.1–1.9 MA) and close the last remaining gap in the El'gygytgyn pollen record. Cooler climates were characterized by a mix of Larix forest-tundra, shrub Betula tundra, and herb-dominated communities. During interglaciations, Larix forests with tree Betula and Alnus, and perhaps with a minor component of Picea and tree Pinus, characterized areas that today are tundra. These forests included a rich shrub understory of Betula, Duschekia, Salix, and Pinus pumila. Although MIS 77 has been considered a “super” interglaciation, the data do not indicate that this stage was exceptionally warm. Interstadial conditions are denoted by pollen assemblages that indicate the regional vegetation was dominated by Larix forest -tundra and an absence of Pinus pumila. The palynological results from this Early Pleistocene interval demonstrate the need to: 1) modify the El'gygytgyn age model; 2) reevaluate the relationship of sediment facies to climate change; and 3) reconsider the occurrence and/or definition of “super” interglaciations. © 2023
2904.
Timing and duration of the early Hettangian marine inundation in the Polish Basin: Organic carbon isotopes and astronomical calibration of the Triassic-Jurassic transition of the Niekłań PIG core (Holy Cross Mountains, SE Poland)
Volumina Jurassica,
2287 – 116
2024
DOI:10.7306/VJ.22.6
2903.
Timescales of mafic magmatic fractionation documented by paleosecular variation in basaltic drill core, Snake River Plain volcanic province, Idaho, USA
Bulletin of the Geological Society of America,
136
(9-10)
4252 – 4262
2024
DOI:10.1130/B37413.1
2902.
The Nam Co Drilling Project, Tibet Plateau (NamCore): A one-million-year sedimentary record from the Third Pole
Past Global Changes Magazine,
32
(2)
76-77
2024
2901.
The Merensky-Bastard interval at Hackney, eastern Bushveld Complex: results of a combined Sr–Nd-isotopic investigation
Contributions to Mineralogy and Petrology,
179
(7)
2024
2900.
The ICDP Dead Sea drilling project: A window into the past 220 kyrs of hydroclimate and seismicity of the Eastern Mediterranean-Levant
Past Global Changes Magazine,
32
(2)
96-97
2024
2899.
The COSC-2 drill core and its well-preserved lower Palaeozoic sedimentary succession – an unexpected treasure beneath the Caledonian nappes
Estonian Journal of Earth Sciences,
73
(2)
134 – 140
2024
2898.
The >250-kyr Lake Chala record: A tephrostratotype correlating archaeological, palaeoenvironmental and volcanic sequences across eastern Africa
Quaternary Science Reviews,
326
2024
Keywords:▾
Africa; East African Lakes; Lake Victoria; Argon; Geochemistry; Geochronology; Sediments; Volcanoes; Africa; Argon dating; East African Rift; East african rift system; Holocenes; Lake chala; Lake sediments; Palaeoclimate; Pleistocene; Rift systems; Tephrochronology; archaeology; chronology; crater lake; geochemistry; geochronology; Holocene; lacustrine deposit; Mesolithic; paleoclimate; tephrochronology; volcanic ash; Lakes
Abstract: ▾ Regional tephrostratigraphic frameworks connect palaeoclimate, archaeological and volcanological records preserved in soils or lake sediments via shared volcanic ash (tephra) layers. In eastern Africa, tracing of tephra isochrons between geoarchaeological sequences is an established chronostratigraphic approach. However, to date, few long tephra records exist from sites with continuous depositional sequences, such as lake sediments, which offer the potential to connect local and discontinuous sequences at the regional scale. Long lake sediment sequences may also capture more complete eruptive histories of understudied volcanic centres. Here, we present and date the tephrostratigraphic record of a >250,000-year (>250-kyr) continuous sediment sequence extracted from Lake Chala, a crater lake on the Kenya-Tanzania border near Mt Kilimanjaro. Single-grain glass major and minor element analyses of visible and six cryptotephra layers reveal compositions ranging from mafic foidites and basanites to more evolved tephri-phonolites, phonolites, trachytes and a single rhyolite. Of these, nine are correlated to scoria cone eruptions of neighbouring Mt Kilimanjaro or the Chyulu volcanic field ∼60 km to the north; seven are correlated to phonolitic eruptions of Mt Meru, ∼100 km to the west; and four to voluminous trachytic eruptions of Central Kenyan Rift (CKR) volcanoes located ∼350 km to the north. The only rhyolitic tephra layer, a cryptotephra, correlates to the 73.7-ka BP (before present, taken as 1950 CE) Younger Toba Tuff (YTT) from Sumatra. Two of the CKR tephra layers provide direct ties with terrestrial sequences relevant to Middle Stone Age archaeology of the eastern Lake Victoria basin in Kenya. Absolute age estimates obtained by direct 40Ar/39Ar dating of 10 tephra layers are combined with six 210Pb and 162 14C dates covering the last 25-kyr and the well-constrained known age of the YTT to build a first absolute chronology for the full Lake Chala sediment sequence. The uninterrupted >250-kyr Lake Chala sedimentary archive represents a unique tephrostratotype sequence for eastern Africa, optimising the chronological value of tephra correlations in regional palaeoenvironmental, archaeological and volcanological research. Further study of cryptotephra in the Lake Chala sequence and additional geochemical characterisation and dating of ancient volcanic eruptions from nearby and further afield may eventually produce a regionally connected and detailed tephrostratigraphic framework for eastern equatorial Africa. © 2024 The Authors
2897.
Radiolytic support for oxidative metabolism in an ancient subsurface brine system
ISME Communications,
4
(1)
2024
2896.
Terminal glacial overdeepenings: Patterns of erosion, infilling and new constraints on the glaciation history of Northern Switzerland
Quaternary Science Reviews,
344
2024
2895.
Technical scheme and research suggestion of deviation prevention and correction for myriametric extra‑deep scientific well (in Chinese with English abstract); [万米科学特深井防斜纠斜技术方案及研究建议]
Drilling Engineering,
51
(4)
31 – 37
2024