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2010040074<br />
瑞 典 南 部 布 莱 金 厄 省 Farslycke 地 区 威 赫 塞<br />
尔 晚 期 花 粉 地 层 学 、 粘 土 年 代 学 、 放 射 性<br />
碳 测 年 和 古 地 磁 学 的 长 期 变 化 = Late<br />
Weichselian pollen stratigraphy, clay-varve<br />
chronology, radiocarbon chronology, and palaeomagnetic<br />
secular variations at Farslycke,<br />
Blekinge, southern Sweden. ( 英 文 ). Ising J.<br />
GFF, 1998, 120(4): 321-332<br />
Pollen analysis, AMS C-14 measurements<br />
and varve counting, carried out on a sequence<br />
of Late Weichselian lacustrine sediments in<br />
Blekinge in southeastern Sweden, show that<br />
the area was deglaciated during the middle<br />
part of the Bolling, at c. 12,500 C-14 years BP<br />
+ c. 200 varve years. This date fits well with<br />
the regional deglaciation chronology. The deglaciation<br />
was accompanied by a typical late<br />
glacial vegetation succession. The varve chronology<br />
for the site is correlated to the regional<br />
chronology for Blekinge, and the ice recession<br />
rate is calculated to c. 100 m/year. The palaeomagnetic<br />
secular variation analyses show<br />
a characteristic westerly declination swing at c.<br />
11,500-10,300 C-14 years BP, which is in accordance<br />
with curves from other sites in<br />
southern Sweden.<br />
2010040075<br />
德 国 西 南 黑 森 林 地 区 南 部 奥 陶 纪 和 志 留 纪<br />
变 质 碎 屑 沉 积 岩 的 原 岩 年 龄 : 孢 粉 学 研 究<br />
及 早 对 古 生 代 大 地 构 造 演 化 的 意 义 = Ordovician<br />
and Silurian protolith ages of metamorphosed<br />
clastic sedimentary rocks from the<br />
southern Schwarzwald, SW Germany: a palynological<br />
study and its bearing on the Early<br />
Palaeozoic geotectonic evolution. ( 英 文 ).<br />
Vaida M; Hann H P; Sawatzki G; Frisch W.<br />
Geological Magazine, 2004, 141(5): 629-643<br />
Sedimentation ages of metamorphosed elastic<br />
sedimentary rocks in the southern Schwarzwald<br />
were determined by associations of palynomorphs.<br />
In the northern subunit of the<br />
Badenweiler-Lenzkirch Zone, two lithostratigraphic<br />
assemblages could be discerned in<br />
low-grade metamorphic units by their facies<br />
and age, thus revealing a more complex internal<br />
structure of this zone than previously assumed.<br />
Lower Ordovician metagreywackes<br />
and metapelites were discerned from Silurian<br />
metasiltstones. In the cataclastically overprinted<br />
metasiltstones and phyllites of the<br />
southern subunit of the Badenweiler-<br />
Lenzkirch Zone, only poorly preserved microfossil<br />
remains could be detected. These show<br />
that the sedimentation ages must be Ordovician<br />
or younger, but still probably Early Palaeozoic.<br />
High-grade metapelitic rocks of the<br />
South Schwarzwald Gneiss Complex contain<br />
chitinozoans in lenses and layers of schists,<br />
that are rich in biotite and graphite. They<br />
yielded mid-Silurian ages and show that this<br />
crystalline complex does not represent an<br />
older basement unit but was the result of marine<br />
sedimentation at that time. The new age<br />
determinations have a bearing on geodynamic<br />
reconstructions of the internal Variscides in<br />
Early Palaeozoic time. They show that sedimentation<br />
in the oceanic realm of the Badenweiler-Lenzkirch<br />
Zone or its margins did not<br />
occur before the Ordovician. After transformation<br />
of the northern passive into an active<br />
continental margin, younger greywackes not<br />
older than Middle Devonian received detritus<br />
from a volcanic arc, forming above the subduction<br />
zone.<br />
2010040076<br />
阿 根 廷 圣 克 路 斯 省 Cabo Curioso 地 区 地 下<br />
渐 新 世 - 早 中 新 世 San Julian 组 和 Monte<br />
Leon 组 的 孢 粉 学 和 微 体 古 生 物 学 = Palynology<br />
and micropaleontology of the San<br />
Julian and Monte Leon Formation (Oligocene<br />
- Early Miocene), Cabo Curioso Subsurface,<br />
Santa Cruz Province, Argentina. ( 其 他 ).<br />
Nanez C; Quattrocchio M E; Ruiz L.<br />
Ameghiniana: Revista de la asociacion Paleontologica<br />
Argentina, 2009, 46(4): 669-693<br />
The CC-3 and CC-4 boreholes drilled a Cenozoic<br />
sedimentary column integrated by the<br />
Monte Le On and San Julian formations, similar<br />
to that cropping out in the Gran Bajo de<br />
San Julian. The palynology and micropaleontology<br />
of both boreholes are analyzed, particularly<br />
focused on the "basal muddy section" of<br />
the San Julian Formation. The palynomorphs<br />
of this section are of continental origin, reflecting<br />
a regional forest dominated by Nothofagaceae,<br />
Myrtaceae, Podocarpaceae and<br />
Palmae, developed under a temperate to<br />
warm-temperate and humid climate. The palynomorphs<br />
from the carbonaceous claystones<br />
of the upper part of this section, dominated by<br />
Poaceae, some Podocarpaceae and the presence<br />
of fresh-water algae, mainly reflect the<br />
local vegetation associated with fresh to<br />
brackish-water swamps. The foraminifera,<br />
recovered from only two horizons from the<br />
middle part of the "basal muddy section",<br />
scarce and poorly preserved, suggest a marginal<br />
marine paleoenvironment, and resemble<br />
those described from the Gran Bajo Member<br />
of the San Julian Formation; the occurrence of<br />
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