radiolaria - Marum

Radiolaria 14 Bibliography - 1991
Banakar, V.K., Gupta, S.M. & Padmavathi, V.K.
1991. Abyssal sediment erosion in the central Indian Basin:
evidence from radiochemical and radiolarian studies. Marine
Geol., 96/1-2, 167-173.
Radiochemical analyses of three spade cores collected around
78 o E between 10°S and 12°S from the abyssal depths in the Central
Indian Basin yield an average accumulaIion rate of 2 mm/ka. The
ratios of 230 Th flux in the sediments to its production rate in the
overlying water column (Fa/Fp) are extremely low (~0.2). This fact,
and the absence of Collosphaera invaginata (first appearance datum,
150-200 ka), an index radiolarian species of Neogene Radiolarian
Zone 1, indicate intense erosion and lateral transport of younger
sediments from this region.
The radiochemical and radiolarian biostratigraphic evidence for
nearly 175 ka of erosion of the chronological record of the
sediments in this region has been attributed to the effect of
turbulent Antarctic Bottom Water entering the Central Indian Basin
through the northern saddles of the Ninety East Ridge
Banerjee, R. & Iyer, S.D. 1991. Biogenic influence on
the growth of ferromanganese micronodules in the Central
India Basin. Marine Geol., 97/3-4, 413-421.
With increasing depth, the abundance of ferromanganese
micro-nodules decreases as their size increases, and the surface
texture changes from rough to smooth. Biological debris, including
radiolarian fragments, diatom tests and bacterial cells were found
associated with the micronodules. Dissolution of biological debris
with increasing core depth was evident. It appears that biological
debris play an important role in the growth of the micronodules
Bareille, G., Labracherie, M., Labeyrie, L.,
Pichon, J.J. & Turon, J.L. 1991. Biogenic silica
accumulation rate during the Holocene in the southeastern
Indian Ocean. Marine Chem., 35, 537-551.
Three box-core transects were selected in the southeastern
Indian Ocean to establish the variability of biogenic silica
accumulation rate in the main subsystems of the Southern Ocean.
Cicladophora davisiana and ∂ 18 0 chronologies, previously calibrated
by 14 C dates, and biogenic silica contents determined by X-ray
diffraction analysis were used to calculate accumulation rates.
Concurrently, a transfer function was used to quantify the silica loss
during the biogenic particulate accumulation in the deep-sea
sediments. The average rate of biogenic silica rain on the sea-floor,
calculated from the accumulation rate and the amount of dissolved
biogenic silica, ranges from less than 0.1 to 16 g opal cm -2 ka -1 .
During the Holocene, biogenic silica has accumulated at the highest
rates on the Southeast Ridge, south of the Polar Frontal Zone. To the
north and south, the accumulation rate drops where summer sea
surface temperatures are above 8°C or lower than 2 o C. Biogenic
silica dissolution is maximum in marginal sea ice zone. Accumulation
rates of biogenic silica can be a useful index to estimate changes of
palaeoproductivity in the southeastern Indian Ocean, although there
is no strict proportionality between accumulation and silica rain
rates.
Barron, J.A., Baldauf, J.G., Barrera, E., Caulet,
J.P., Huber, B.T., Keating, B.H., Lazarus, D.,
Sakai, H., Thierstein, H.R. & Wei, W. 1991.
Biochronology and magnetostratigraphic synthesis of Leg
119 sediments from the Kerguelen Plateau and Prydz Bay,
Antarctica. In: Proceedings of the Ocean Drilling Program,
Scientific Results. (Barron, J.A., Larsen, B. et al., Eds.), vol.
119. College Station, TX (Ocean Drilling Program), pp.
813-847.
This paper summarizes the biostratigraphy and
magnetostratigraphy of the 11 sites drilled on the Kerguelen Plateau
and in Prydz Bay, Antarctica, during ODP Leg 119. Excellent
magnetobiochronologic reference sections were obtained at deepwater
Sites 745 and 746 (0-10 Ma) and at intermediate depth Site
744 (0-39 Ma) on the southern Kerguelen Plateau. Site 738, an
intermediate depth companion site for Site 744, contains a nearly
complete lowermost Oligocene to Turonian carbonate section
including a continuous sequence across the Cretaceous/Tertiary
boundary. Northern Kerguelen Sites 736 and 737 (ca. 600 m water
depth) constitute a composite middle Eocene to Quaternary
reference section near the present-day Antarctic Polar Front.
Biostratigraphic control is limited in Prydz Bay Sites 739-743.
Glacial sequences cored on the continental shelf at Sites 739 and
742 appear to form a composite record, possibly from the
uppermost middle Eocene to the Quaternary; the entire upper
Oligocene and most of the Miocene, however, are removed at an
unconformity. Preglacial sediments at Site 741 contain Early
Cretaceous pollen and spores, but the red beds cored at Site 740
- 59 -
are unfossiliferous. Poorly-fossiliferous glacial sediments of
probable Quaternary age were sampled on the upper slope at Site
743.
A magnetobiochronologic time scale is presented for the Late
Cretaceous and Cenozoic of the Southern Ocean based on previous
studies and the results of Leg 119 studies.
Basov, V.A. & Vishnevskaya, V.S. 1991. Upper
Mesozoic stratigraphy of the Pacific Ocean. In: Circum-
Pacific Council for Energy and Mineral Resources. Eds.).
Nauka, Moscow. pp. 200. (in Russian)
The book is dealing with the biostratigraphy of the Pacific Upper
Mesozoic sedimentary cover. Subdivision and correlation of the
Upper Mesozoic deposits within under-sea rises and deepwater
basins were carried out by means of planktonic foraminifers and
radiolarians. The history of sedimentation in the Pacific Ocean during
the Late Mesozoic i5 discussed. The paleontological part contains
the microphotographs of both planktonic Foraminifera and Radiolaria
characteristic species and new species descriptions of the latter
ones.
Baumgartner, P.O., Jud, R., O'Dogherty, L.,
Gorican, S., Marcucci, M. & Conti, M. 1991.
Mesozoic radiolarian occurrences in the Umbria-Marche
Apennines. Field trip guide book of the 6th. Interrad
Meeting, Florence, Italy, September 1991, 1-23 p.
This field trip offers the opportunity to visit the Mesozoic
pelagic sequences of the Umbria-Marche area (Fig. 1) and to
examine Middle Jurassic to Late Cretaceous Tethyan radiolarianbearing
rocks. The main topics addressed during this field trip are: 1.
distribution patterns of Jurassic siliceous and calcareous pelagic
facies in a basin and swell setting and genetic interpretation of
radiolarites. 2. The generalized onset of nannofossil limestones near
the Jurassic/Cretaceous boundary: evolution of the biosphere,
paleoceanographic and climatic change in Western Tethys during the
Early Cretaceous. 3. Black shale and cyclic marl/limestone
sedimentation during the middle Cretaceous: the role of radioiarians
in explaining widespread anoxia and Milankovich-type sedimentary
cycles.
Bender, P., Braun, A. & Königshof, P. 1991.
Radiolarien und Conodonten aus unterkarbonischen
Kieselkalken und Kieselschiefern des nördlichen Rheinischen
Schiefergebirges. Geologica et Paleontologica, 25, 87-97.
Siliceous and fluoritized radiolarians have been obtained
together with Conodonts in beds of siliceous limestones and shales
in a rock sequence near Lermarhe (northern Rheinisches
Schiefergebirse). A radiolarian fauna from the Upper Albaillellaindensis-zone
has been assigned to the upper part of the anchoralislatus-zone
of the Conodont biostratigraphic scale. Radiolarian
faunas of the Upper Albaillella-cartalla-zone belong at least to the
Upper texanus zone, most probably to the bilineatus-zone in their
greatest part. A redeposition of isolated skeletons of older forms as
found in Conodont faunas of several beds has nor been observed in
the co-occurring radiolarians. Radiolarian-bearing sequences of
siliceous rocks with common interlayers of allodapic limestones
belonging to the Upper Albaillella-cartalla-zone possess a least
thickness of 10 m.
Blome, C.D. & Nestell, M.K. 1991. Evolution of a
Permo-Triassic sedimentary melange, Grindstone terrane,
east-central Oregon. Geol. Soc. Amer., Bull., 103/10, 1280-
1296.
The Grindstone terrane in east-central Oregon is one of the few
areas in western North America where large blocks of
unmetamorphosed Devonian, Mississippian, and Permian limestones
are intermixed with Permian and Lower Triassic radiolarian chert and
Pennsylvanian?, Permian, and Triassic volcaniclastic rocks. Although
originally described as parts of a coherent succession, we interpret
the Grindstone rocks to be a sedimentary melange composed of
Paleozoic limestone slide and slump blocks that became detached
from a carbonate shelf fringing a volcanic knoll or edifice in Late
Permian to Middle Triassic time and were intermixed with Permian
and Triassic slope to basinal clastic and volcaniclastic rocks in a
forearc basin setting. Paleogeographic affinities of the Grindstone
limestone faunas and volcaniclastic debris in the limestone and
clastic rocks all indicate deposition in proximity to an island-arc
system near the North American craton. The Grindstone terrane
deposits are unconformably overlain by Upper Triassic to Middle
Jurassic sequences of the Izee terrane. Although lithologic and
faunal differences indicate that the Grindstone and Izee terranes
together represent a tectonic block separate from the adjacent
Baker terrane, all three terranes were juxtaposed by Late Triassic or
Early Jurassic time.