Zobrazeno 1 - 10
of 35
pro vyhledávání: '"Ulf Sturesson"'
Publikováno v:
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms. 268:1253-1256
Microcrystalline, calcian rhodochrosite occurs as nodules around burrows in late Neogene pelagic sediments from the Galapagos Ridge in the Guatemala Basin, eastern equatorial Pacific (DSDP Leg 68; Site 503). Be-10 isotope revealed that the rhodochros
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::21f202ff11a307ad1d00c6d1e305f1fd
https://doi.org/10.1016/j.nimb.2009.10.146
https://doi.org/10.1016/j.nimb.2009.10.146
Autor:
B. Belyatsky, Ulf Sturesson, Michael G. Bassett, Sergei Felitsyn, Leonid E. Popov, Lars E. Holmer
Publikováno v:
Geological Magazine. 142:419-439
Biogenic apatite preserved in 148 samples of conodonts and organophosphatic-shelled brachiopods from Cambrian through Ordovician successions of the Baltoscandian Basin (Baltica Plate) preserves a sensitive record of early Palaeozoic sea-water chemist
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1bef06395ed38d27f7531f95449d8122
https://doi.org/10.1017/s0016756805000877
https://doi.org/10.1017/s0016756805000877
Autor:
Ulf Sturesson
Publikováno v:
Sedimentary Geology. 159:241-256
The Ordovician iron oolites in Baltoscandia are generally geographically extensive but lean, [
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7633cf3cbe8b9a95f2a05f7b067dd676
https://doi.org/10.1016/s0037-0738(02)00330-5
https://doi.org/10.1016/s0037-0738(02)00330-5
Publikováno v:
Sedimentary Geology. 136:137-146
The discovery of an unconsolidated deposit of iron ooids of a kind not previously described, and in the vicinity of a volcanic island in Indonesia has shed new light on the genesis of many ancient iron oolites. The discovery shows that iron ooid form
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::22cd6ada6f7400a2d9e265c726947f78
https://doi.org/10.1016/s0037-0738(00)00091-9
https://doi.org/10.1016/s0037-0738(00)00091-9
Publikováno v:
Sedimentary Geology. 123:63-80
On the Baltic platform a lower Llanvirn (Ordovician) iron oolite can be traced for a distance of 1200 km from Norway to the east of Lake Ladoga in Russia. This oolite is usually thin (seldom exceeding 0.5 m) and is dominated by goethite (limonite) ty
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6a7af2e9d8510cc4772c90bc5f4b8e8e
https://doi.org/10.1016/s0037-0738(98)00112-2
https://doi.org/10.1016/s0037-0738(98)00112-2
Autor:
Ulf Sturesson
Publikováno v:
Chemical Geology. 125:45-60
The chemical and mineralogical compositions of Llanvimian (Ordovician) iron and associated phosphate ooids from Sweden, Estonia and Russia have been examined. The oolites are generally thin and lean (mud supported), and dominated by Fe-oxyhydroxide (
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::edc9c958659946abdd5c37b350c5f0e3
https://doi.org/10.1016/0009-2541(95)00076-x
https://doi.org/10.1016/0009-2541(95)00076-x
Autor:
Ulf Sturesson
Publikováno v:
GFF. 116:249-253
Most ooids in an iron oolitic limestone of Llanvirnian age from the Mj⊘sa district, Norway, have been diagenetically altered, and the original iron silicate (berthierine) has been replaced by carbonate minerals such as calcite, ferroan calcite, and
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a689a65da009dba60d468126d1522b96
https://doi.org/10.1080/11035899409546190
https://doi.org/10.1080/11035899409546190
Autor:
Heikki Bauert, Ulf Sturesson
Publikováno v:
Sedimentary Geology. 93:51-72
The occurrence of iron ooid beds in the Ordovician sequence of Baltoscandia has been known for a long time. In Estonia, the best developed ooid beds are known to occur at two levels in the Lower (Oelandian) to Middle Ordovician (Viruan) boundary inte
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8b926730647530ef2d637be9e20697a7
https://doi.org/10.1016/0037-0738(94)90028-0
https://doi.org/10.1016/0037-0738(94)90028-0
Autor:
Ulf Sturesson
Publikováno v:
Geologiska Föreningen i Stockholm Förhandlingar. 114:431-445
The transition between the Lower and Middle Ordovician in south-central Sweden marks a change from rather stable sedimentological conditions to a period with several dramatic events. The transition is accompanied by a pronounced change in the macrofa
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::234d7bb48ea9f1325004e0ed32e111f7
https://doi.org/10.1080/11035899209453902
https://doi.org/10.1080/11035899209453902
Autor:
Ulf Sturesson
Publikováno v:
SEPM Journal of Sedimentary Research. 62
Iron-rich oolites from a Middle Ordovician (Llanvirn-Llandeilo) sequence in south-central Sweden are associated with volcanic ash beds, clear evidence that volcanic activity was coeval with a period of extensive iron ooid formation in Baltoscandia. R
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8e4b16c7f5ba2d92fb54517b10bdba1a
https://doi.org/10.1306/d4267a55-2b26-11d7-8648000102c1865d
https://doi.org/10.1306/d4267a55-2b26-11d7-8648000102c1865d