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Book ; Online: Petrophysical investigation on sediment core CRP-3 from the Ross Sea, Antarctica, supplementary data to: Jarrard, Richard D (2001): Petrophysics of core plugs from CRP-3 drillhole, Victoria Land Basin, Antarctica. Terra Antartica, 8(3), 143-150

Jarrard, Richard D

2001

Abstract: A suite of petrophysical properties - velocity, resistivity, bulk density, porosity, and matrix density - was measured on 88 core plugs from the CRP-3 drillhole. Core-plug bulk densities were used to recalibrate both whole-core and downhole bulk density ... ...

Abstract	A suite of petrophysical properties - velocity, resistivity, bulk density, porosity, and matrix density - was measured on 88 core plugs from the CRP-3 drillhole. Core-plug bulk densities were used to recalibrate both whole-core and downhole bulk density logs. Core-plug measurements of matrix density permit conversion of the whole-core and downhole bulk density logs to porosity. Both velocity and formation factor (a normalized measure of resistivity) are strongly correlated with porosity. The velocity/porosity pattern is similar to that for the lower part of CRP-2A and is consistent with the empirical relationship for sandstones. Core-plug and whole-core measurements of P-wave velocity at atmospheric pressure exhibit excellent agreement. Measurements of velocity as a function of pressure indicate a significantly higher velocity sensitivity to pressure than has been observed at CRP-1 and CRP-2A; rebound or presence of microcracks at CRP-3 may be responsible. The percentage difference between velocities at in situ pressures and atmospheric pressures increases downhole from 0% at the seafloor to 9% at the bottom. This pattern can be used to correct whole-core velocity data, measured at atmospheric pressure, to in situ velocities for depth-to-time conversion and associated comparison to the seismic profile across the drillsite
Language	English
Dates of publication	2001-9999
Size	Online-Ressource
Publisher	PANGAEA - Data Publisher for Earth & Environmental Science
Publishing place	Bremen/Bremerhaven
Document type	Book ; Online
Note	This dataset is supplement to hdl:10013/epic.28212.d001
DOI	10.1594/PANGAEA.510758
Database	Library catalogue of the German National Library of Science and Technology (TIB), Hannover

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Book ; Conference proceedings ; Online: (Table T1) Density and porosity measurements of basalt core plugs from ODP Site 206-1256, supplementary data to: Jarrard, Richard D; Kerneklian, Marcy J (2007): Data report: Physical properties of the upper oceanic crust of ODP Site 1256: Multisensor track and moisture and density measurements. In: Teagle, DAH; Wilson, DS; Acton, GD; Vanko, DA (eds.) Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 206, 1-11

Jarrard, Richard D / Kerneklian, Marcy J

2007

Abstract: Bulk density, porosity, and matrix density were measured on 88 basalt core plugs from Ocean Drilling Program Site 1256. Shipboard measurements using the multisensor track were reprocessed and edited to minimize the effects of core segmentation and ... ...

Abstract	Bulk density, porosity, and matrix density were measured on 88 basalt core plugs from Ocean Drilling Program Site 1256. Shipboard measurements using the multisensor track were reprocessed and edited to minimize the effects of core segmentation and calibration problems and are presented in this data report.
Language	English
Dates of publication	2007-9999
Size	Online-Ressource
Publisher	PANGAEA - Data Publisher for Earth & Environmental Science
Publishing place	Bremen/Bremerhaven
Document type	Book ; Conference proceedings ; Online
Note	This dataset is supplement to doi:10.2973/odp.proc.sr.206.011.2007
DOI	10.1594/PANGAEA.775807
Database	Library catalogue of the German National Library of Science and Technology (TIB), Hannover

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Book ; Conference proceedings ; Online: (Table T1) Mineralogy of ODP Leg 199 and DSDP Hole 16-162 sediments - comparison of methods, supplementary data to: Vanden Berg, Michael D; Jarrard, Richard D (2006): Data report: High-resolution mineralogy for Leg 199 based on reflectance spectroscopy and physical properties. In: Wilson, PA; Lyle, M; Firth, JV (eds.) Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 199, 1-23

Vanden Berg, Michael D / Jarrard, Richard D

2006

Abstract: During Ocean Drilling Program Leg 199 in the equatorial Pacific, visible and near-infrared spectroscopy (VNIS) was used to measure the reflectance spectra (350-2500 nm) of 1343 sediment samples. Reflectance spectra were also measured for a suite of 60 ... ...

Abstract	During Ocean Drilling Program Leg 199 in the equatorial Pacific, visible and near-infrared spectroscopy (VNIS) was used to measure the reflectance spectra (350-2500 nm) of 1343 sediment samples. Reflectance spectra were also measured for a suite of 60 samples of known mineralogy, thereby providing a local ground-truth calibration of spectral features to percentages of calcite, opal, smectite, and illite. The associated algorithm was used to calculate mineral percentages from the 1343 spectra. Using multiple regression and VNIS mineralogy, multisensor track physical properties and light spectroscopy data were then converted into continuous high-resolution mineralogy logs. REFERENCE: Lyle, Mitchell W; Wilson, Paul A; Janecek, Thomas R; et al (2002): Proceedings of the Ocean Drilling Program, Initial Reports. College Station, Texas (Ocean Drilling Program), 199, online Olivarez Lyle, Annett; Lyle, Mitchell W (2002): Determination of biogenic opal in pelagic marine sediments: A simple method revisited. In: Lyle, M; Wilson, PA; Janecek, TR; et al., Proceedings of the Ocean Drilling Program, Initial Reports. College Station, TX (Ocean Drilling Program), 199, 1-21
Language	English
Dates of publication	2006-9999
Size	Online-Ressource
Publisher	PANGAEA - Data Publisher for Earth & Environmental Science
Publishing place	Bremen/Bremerhaven
Document type	Book ; Conference proceedings ; Online
Note	This dataset is cited by doi:10.2973/odp.proc.ir.199.106.2002 ; This dataset is cited by doi:10.2973/odp.proc.ir.199.2002 ; This dataset is supplement to doi:10.2973/odp.proc.sr.199.203.2006
DOI	10.1594/PANGAEA.776949
Database	Library catalogue of the German National Library of Science and Technology (TIB), Hannover

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Book ; Online: Petrophysical investigations on sediment core CRP-2A from the Ross Sea, Antarctica, supplementary data to: Brink, Jason; Jarrard, Richard D (2000): Petrophysics of core plugs from CRP-2A drillhole, Victoria Land Basin, Antarctica. Terra Antartica, 7(3), 231-240

Brink, Jason / Jarrard, Richard D

2000

Abstract: A suite of petropysical measurements - velocity versus pressure, bulk density, porosity, matrix density, and magnetic susceptibility -was undertaken on 63 core plugs from CRP-2A. These data are used to calibrate neutron, resistivity, and magnetic ... ...

Abstract	A suite of petropysical measurements - velocity versus pressure, bulk density, porosity, matrix density, and magnetic susceptibility -was undertaken on 63 core plugs from CRP-2A. These data are used to calibrate neutron, resistivity, and magnetic susceptibility well logs. Agreement between core-plug magnetic susceptibility measurements and both well-log and whole-core data is excellent. Comparison of core-plug bulk densities with continious well-log density records shows very good agreement. Core-plug measurements of matrix density permit conversion of the well-log and whole-core density records to porosity. Sands and muds exhibit similar downhole compaction patterns, and both patterns are consistent with 250 ? 150 m of exhumation. Pervasive cementation, particularly in the lower half of the core, has affected many CRP-2A petrophysical parameters: (1) fractional porosities are reduced by about 0.05 - 0.10 in the lower part of the hole; (2) velocity and porosity rebound are much smaller than is usually observed for unconsolidated sediments with burial depths similar to CRP-2A; (3) velocities are unusually insensitive to pressure, suggesting that any exhumation-induced microcracks have been scaled subsequently; (4) the velocity/porosity relationship lacks the characteristic signature of exhumation-induced microcracks; (5) the velocity/porosity relationship changes with depth, indicating downhole increase in consolidation; (6) Vp/Vs ratios of the highest-porosity sediments are unusually low, implying enhancement of framework stiffness.
Language	English
Dates of publication	2000-9999
Size	Online-Ressource
Publisher	PANGAEA - Data Publisher for Earth & Environmental Science
Publishing place	Bremen/Bremerhaven
Document type	Book ; Online
Note	This dataset is supplement to hdl:10013/epic.28278.d001
DOI	10.1594/PANGAEA.510751
Database	Library catalogue of the German National Library of Science and Technology (TIB), Hannover

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Book ; Online: Petrophysical measurements on core plug samples of sediment core CRP-1 (Table 1), supplementary data to: Brink, Jason; Jarrard, Richard D (1998): Petrophysics of core plugs from CRP-1 drillhole, Victoria Land Basin, Antarctica. Terra Antartica, 5(3), 291-297

Brink, Jason / Jarrard, Richard D

1998

Abstract: This paper reports measurements of velocity vs pressure and of bulk density, porosity, matrix density, and magnetic susceptibility in 18 core plugs from CRP-1. Comparison of our bulk densities with continuous whole-core density records shows very good ... ...

Abstract	This paper reports measurements of velocity vs pressure and of bulk density, porosity, matrix density, and magnetic susceptibility in 18 core plugs from CRP-1. Comparison of our bulk densities with continuous whole-core density records shows very good agreement. Core-plug measurements of matrix density permit conversion of the whole-core density record to porosity. Agreement between our magnetic susceptibility measurements and the continuous, whole-core data is excellent. In contrast, our atmospheric pressure measurements of P-wave velocity are ~10% faster than whole-core data obtained at the same pressure. Our measurements of velocity versus pressure indicate that in situ P-wave velocities are probably only 1-3% higher than those measured at atmospheric pressure. Although the Miocene section has undergone significant exhumation, we do not observe typical exhumation signatures of anomalously low initial velocities followed by microcrack closing as pressure is increased. Instead, velocity response to pressure appears to be dominated by a small amount of post-exhumation cementation.
Language	English
Dates of publication	1998-9999
Size	Online-Ressource
Publisher	PANGAEA - Data Publisher for Earth & Environmental Science
Publishing place	Bremen/Bremerhaven
Document type	Book ; Online
Note	This dataset is supplement to hdl:10013/epic.28342.d001
DOI	10.1594/PANGAEA.54728
Database	Library catalogue of the German National Library of Science and Technology (TIB), Hannover

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Book ; Online: (Table 1) Core intervals of sediment core CRP-3 that have been stitched and reorientated to North, supplementary data to: Jarrard, Richard D; Paulsen, Timothy S; Wilson, Terry (2001): Orientation of CRP-3 core, Victoria Land Basin, Antarctica. Terra Antartica, 8(3), 161-166

Jarrard, Richard D / Paulsen, Timothy S / Wilson, Terry

2001

Abstract: CRP-3 cores were not orientated with respect to North during coring operations. However, borehole televiewer (BHTV) logging did obtain azimuthally orientated images of the borehole wall, and core processing included digital imaging of the outer surface ... ...

Abstract	CRP-3 cores were not orientated with respect to North during coring operations. However, borehole televiewer (BHTV) logging did obtain azimuthally orientated images of the borehole wall, and core processing included digital imaging of the outer surface of 85% of the cores. Images of many individual core segments can be digitally joined, or stitched, by rotating them to match the shapes of their adjoining surfaces and then closing the gap. By aligning features (fractures, bedding, and clasts) on stitched-core images with correlative features on orientated BHTV images, we reorientated 231 m of core, or 25% of the cored interval. We estimate that the orientation uncertainty is ±10° for entire stitched-core intervals, and ±15° for individual features such as a single fracture or palaeomagnetic sample. Reliability of core orientations was confirmed by comparing azimuths of bedding and fractures measured directly within these reorientated cores to those measured within orientated borehole televiewer images.
Language	English
Dates of publication	2001-9999
Size	Online-Ressource
Publisher	PANGAEA - Data Publisher for Earth & Environmental Science
Publishing place	Bremen/Bremerhaven
Document type	Book ; Online
Note	This dataset is supplement to hdl:10013/epic.28211.d001
DOI	10.1594/PANGAEA.465903
Database	Library catalogue of the German National Library of Science and Technology (TIB), Hannover

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Book ; Online: Physical properties of sediment core CRP-1, supplementary data to: Niessen, Frank; Jarrard, Richard D (1998): Velocity and porosity of sediments from CRP-1 drillhole, Ross Sea, Antarctica. Terra Antartica, 5(3), 311-318

Niessen, Frank / B?cker, Christian / Jarrard, Richard D

1998

Abstract: The relationship between whole-core compressional wave velocities and gamma-ray attenuation porosities of sediments cored at CRP-1 is examined and compared with results from core-plug samples and global models. Both core-plug and whole-core velocities ... ...

Abstract	The relationship between whole-core compressional wave velocities and gamma-ray attenuation porosities of sediments cored at CRP-1 is examined and compared with results from core-plug samples and global models. Both core-plug and whole-core velocities show a strong dependence on porosity: this relationship appears to be independent of lithology. In the range from 0.1 to 0.4 of fractional porosity (Miocene strata), plug velocities are generally 0.2 - 0.5 km s-1 higher than whole-core velocities. Possible reasons include decreased rigidity in the whole core and diagenetic changes in the plugs. Possibly both velocity measurements are correct but neither is fully representative for in situ conditions. It appears that the core-plug results are more compatible with data from other regions than the whole-core data. After removing first-order compaction control from the whole-core porosity record, a second-order control by clay content can be quantified as a simple positive linear regression (R=0.6). In contrast, after correction for first-order control, porosity and velocity are not significantly influenced by lonestone abundance except for rare, very large lonestones. REFERENCE: Niessen, Frank; Jarrard, Richard D; B?cker, Christian (1998): Log-based physical properties of the CRP-1 Core, Ross Sea, Antarctica. Terra Antartica, 5(3), 299-310
Language	English
Dates of publication	1998-9999
Size	Online-Ressource
Publisher	PANGAEA - Data Publisher for Earth & Environmental Science
Publishing place	Bremen/Bremerhaven
Document type	Book ; Online
Note	This dataset is cited by hdl:10013/epic.28317.d001 ; This dataset is supplement to hdl:10013/epic.28316.d001
DOI	10.1594/PANGAEA.54619
Database	Library catalogue of the German National Library of Science and Technology (TIB), Hannover

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Book ; Conference proceedings ; Online: Electrical properties of basalts of ODP Sites 124-768 and 124-770, supplementary data to: Jarrard, Richard D; Schaar, Ralph (1991): Electrical properties of basalts from Sites 768 and 770. In: Silver, EA; Rangin, C; von Breymann, MT; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 124, 91-104

Jarrard, Richard D / Schaar, Ralph

1991

Abstract: Conductivity of 54 basalt samples from ODP Sites 768 and 770 was measured as a function of temperature and fluid salinity. Porosity was also measured for all samples, and cation exchange capacity was measured for 46 of the samples. Porosity measurements ... ...

Abstract	Conductivity of 54 basalt samples from ODP Sites 768 and 770 was measured as a function of temperature and fluid salinity. Porosity was also measured for all samples, and cation exchange capacity was measured for 46 of the samples. Porosity measurements indicated that porosity is underestimated for basalts like these, unless one uses extensive drying at high vacuum. At salinities greater than 29 ppt, and throughout the range of salinity and temperatures likely in situ, sample conductivity (Co) is controlled by porosity (phi) according to the Archie relation Co = 0.22Cw phi1-3 (orFF = 4.5/f1.3), where Cw is conductivity of the pore fluids and FF = Cw/CO is the formation factor. At lower salinity, clay-surface conduction or microcrack conduction may dominate. We are unable to distinguish reliably between the two mechanisms, but we do detect their effects subtly at high salinity and strongly at low salinity.
Language	English
Dates of publication	1991-9999
Size	Online-Ressource
Publisher	PANGAEA - Data Publisher for Earth & Environmental Science
Publishing place	Bremen/Bremerhaven
Document type	Book ; Conference proceedings ; Online
Note	This dataset is supplement to doi:10.2973/odp.proc.sr.124.172.1991
DOI	10.1594/PANGAEA.762188
Database	Library catalogue of the German National Library of Science and Technology (TIB), Hannover

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Book ; Conference proceedings ; Online: Physical properties of ODP Holes 124-768C and 124-770C (Table 1), supplementary data to: Jarrard, Richard D; Broglia, Christina (1991): Geophysical properties of oceanic crust at Sites 768 and 770. In: Silver, EA; Rangin, C; von Breymann, MT; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 124, 75-90

Jarrard, Richard D / Broglia, Christina

1991

Abstract: Velocity, density, resistivity, and neutron-porosity logs were recorded in virtually the entire 222-m-thick section of basaltic back-arc crust drilled at Site 768 and through the 106-m section of MORB crust at Site 770. Our analysis of these logs and ... ...

Abstract	Velocity, density, resistivity, and neutron-porosity logs were recorded in virtually the entire 222-m-thick section of basaltic back-arc crust drilled at Site 768 and through the 106-m section of MORB crust at Site 770. Our analysis of these logs and comparison with measurements on discrete cores permit determination of interlog relationships and evaluation of the reliability of each log. Crustal porosity (Phi) at the two sites is most accurately determinable from transit time (Delta t) and the inverse of velocity: Phi = 0.0054Delta t - 0.259. Porosity is also closely related to resistivity (Ro), according to the Archie equation: Ro = (Rwas*-m where Rw is resistivity of the formation fluid, and a and m are empirically determined "constants." Both logs and cores indicate that a and m range from 2 to 6.5 and 1.2 to 1.6, respectively. Density values estimated from sonic porosity are broadly similar to, but more reliable than, density logs. Neutron-porosity logs yield values 10%-20% higher than actual porosities; this error is caused primarily by lack of proper tool eccentralization and secondarily by the presence of hydrous alteration minerals in the rocks. These in-situ geophysical properties of oceanic crust 18 Ma and 42 Ma help to bridge the in-situ measurement gap between 6 Ma and 110 Ma at other sites. Observed velocities, densities, and porosities are generally similar to predictions from crustal aging models. We infer that this correspondence is largely coincidental; observed properties here are related more to style of volcanism than to crustal aging, and crustal heterogeneity is so high that a 100-200-m-interval is not representative of larger scale geophysical properties.
Language	English
Dates of publication	1991-9999
Size	Online-Ressource
Publisher	PANGAEA - Data Publisher for Earth & Environmental Science
Publishing place	Bremen/Bremerhaven
Document type	Book ; Conference proceedings ; Online
Note	This dataset is supplement to doi:10.2973/odp.proc.sr.124.125.1991
DOI	10.1594/PANGAEA.761966
Database	Library catalogue of the German National Library of Science and Technology (TIB), Hannover

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Book ; Online: Downhole logging of the AND-2A borehole, Victoria Land Basin, McMurdo Sound, Antarctica, supplementary data to: Wonik, Thomas; Grelle, T; Handwerger, David A; Jarrard, Richard D; McKee, A; Patterson, T; Paulsen, T; Pierdominici, P; Schmitt, D R; Schröder, Henning; Speece, M; Wilson, Terry; SMS Science Team (2009): Downhole measurements in the AND-2A borehole, ANDRILL southern McMurdo Sound Project, Antarctica. Terra Antartica, 15(1), 41-48

Wonik, Thomas / Grelle, T / Handwerger, David A / Jarrard, Richard D / McKee, A / Patterson, T / Paulsen, T / Pierdominici, P / Schmitt, D R / al., et

2009

Abstract: Under the framework of the ANDRILL Southern McMurdo Sound (SMS) Project successful downhole experiments were conducted in the 1138.54 metre (m)-deep AND-2A borehole. Wireline logs successfully recorded were: magnetic susceptibility, spectral gamma ray, ... ...

Abstract	Under the framework of the ANDRILL Southern McMurdo Sound (SMS) Project successful downhole experiments were conducted in the 1138.54 metre (m)-deep AND-2A borehole. Wireline logs successfully recorded were: magnetic susceptibility, spectral gamma ray, sonic velocity, borehole televiewer, neutron porosity, density, calliper, geochemistry, temperature and dipmeter. A resistivity tool and its backup both failed to operate, thus resistivity data were not collected. Due to hole conditions, logs were collected in several passes from the total depth at ~1138 metres below sea floor (mbsf) to ~230 mbsf, except for some intervals that were either inaccessible due to bridging or were shielded by the drill string. Furthermore, a Vertical Seismic Profile (VSP) was created from ~1000 mbsf up to the sea floor. The first hydraulic fracturing stress measurements in Antarctica were conducted in the interval 1000-1138 mbsf. This extensive data set will allow the SMS Science Team to reach some of the ambitious objectives of the SMS Project. Valuable contributions can be expected for the following topics: cyclicity and climate change, heat flux and fluid flow, seismic stratigraphy in the Victoria Land Basin, and structure and state of the modern crustal stress field.
Language	English
Dates of publication	2009-9999
Size	Online-Ressource
Publisher	PANGAEA - Data Publisher for Earth & Environmental Science
Publishing place	Bremen/Bremerhaven
Document type	Book ; Online
DOI	10.1594/PANGAEA.761920
Database	Library catalogue of the German National Library of Science and Technology (TIB), Hannover

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