New geochronological and geochemical data document a new widely distributed succession of igneous sedimentary rocks within the Sibumasu that extend from SW Yunnan through SE Asia as far Sumatra. Our revealed presence an Ordovician-Silurian (mainly ?490–430 Ma) zone. The early Paleozoic granites in zone display similar elemental Sr–Nd–Pb–Hf isotopic compositions. They were derived common mixed s...

Precambrian and Early Paleozoic magmatic activities in the Lhasa terrane provides important context for distinguishing between North South terranes, deciphering nature geotectonic history of northern margin Rodinia Gondwana supercontinents. Here, we conducted a detailed petrological, geochemical, geochronological study mafic to granitic meta-intrusive rocks Bomi complex eastern segment terrane....

The provenance of the upper Cambrian to Upper Ordovician sedimentary rocks Tasmania and Waratah Bay in southern Victoria provides information about complex dynamic tectonic environment present during their deposition. This paper uses U–Pb detrital zircon data constrain stratigraphic comparisons reconstructions these rock sequences. Multivariate statistics are used investigate similarity between...

Variably oriented dolerite intrusions outcrop in the Albany–Fraser Orogen along south coast of Western Australia with previously unknown ages but where previous studies interpreted Mesoproterozoic to Cretaceous emplacement. Here, we place temporal constraints on seven mafic across ∼150 km using zircon U–Pb, apatite and plagioclase 40Ar/39Ar geochronology, coupled whole-rock major trace-element ...

The basal Cambrian sandstone unit in the North China craton (NCC) is an example of globally widespread siliciclastic succession that resides on Great Unconformity and deposited a hypothesized low-lying peneplain during global eustatic sea-level rise. Detrital zircon age signatures from this distinct sequence enable recognition ancient drainage system NCC deep time track its potential linkage wi...

We report 87Sr/86Sr measurements on a suite of well preserved sedimentary carbonates from Lower Cambrian strata of the Lena River region of Siberia. Stable isotopes and major and trace element chemistry have been used to identify potentially unaltered samples for Sr isotopic measurements. The Sr data define a smooth curve of paleoseawater 87Sr/86Sr values from the Tommotian through to the early...

In the most complete and first radiometrically dated Precambrian-Cambrian transition strata along the Khorbusuonka River in northern Siberia, a succession of fossilized traces of activity of the earliest infaunal animals has been identified. As supplemented by a similar record in Podolia, the Ukraine and elsewhere. This collection demonstrates that thus far all of the structurally identifiable ...

for study of different types of stromatolites, their modes of growth and their relation to sequence stratigraphy within the derinjal formation, three stratigraphic sections at dahuieh, gatkueih and gazueih in se and e of zarand (nw kerman), were measured and sampled with thickness of 160, 140 and 130 meter, respectively. modes of sediment accretion, trapping and binding of sedimentary grains, t...