 | Zech, Michael, Mayr, Christoph, Tuthorn, Mario, Leiber-Sauheitl, Katharina, Glaser, Bruno (2014) Oxygen isotope ratios (18O/16O) of hemicellulose-derived sugar biomarkers in plants, soils and sediments as paleoclimate proxy I: Insight from a climate chamber experiment. Geochimica et Cosmochimica Acta, 126. 614-623 doi:10.1016/j.gca.2013.10.048 | Journal (article/letter/editorial) | | Insight from a climate chamber experiment Michael Zech a,b,c,⇑, Christoph Mayr d,e, Mario Tuthorn a,b,...Germany. E-mail address: michael_zech@gmx.de (M. Zech). 0016-7037/$ - see front matter Ó 2013 Elsevier...http://dx.doi.org/10.1016/j.gca.2013.10.048 M. Zech et al. / Geochimica et Cosmochimica Acta 126 (2014)...alternative, recently developed method (Zech and Glaser, 2009; Zech et al., 2013), which is based on compound-specific...– isotope ratio mass spectrometry (GC–Py–IRMS) (Zech et al., 2011). The sugar biomarkers are thereby |  | | Journal (issue) | | volume 21, January—February, 1996 Figure 2. Calcite crystal, 19.5 cm , from D a l’negorsk, Russia....present in calcite, has a very small probability o f absorption o f ultraviolet light. H ence, calcite w ith...n o t be visibly lum inescent. However, m uch calcite from Franklin, N ew Jersey, is strongly lum inescent...Fluores cence is relatively slow from M n 2+ in calcite, due to the low probability o f emission (just...absorption). I fM n 2+ were n o t present in Franklin calcite, w hat w ould happen? Probably we w ould see emission |  | | Journal (article/letter/editorial) | | S.R., see Stefánsdóttir, M.B. Glaser, B., see Zech, R. Goblet, P., see Castro, M.C. Gomez-Dans, J.L...Proxies for silicate weathering? Kubik, P.W., see Zech, R. Kuo, B.-Y., see Lin, S.-C. 237 (2005) 781 ...other trace elements in recrystallized aragonite–calcite speleothems from caves in the Pyrenees (France):...from coastal Queensland, Australia Sosin, P., see Zech, R. Stanley, R., see Stark, S. Stark, S., Statham...237 237 237 237 237 237 Zech, R., Glaser, B., Sosin, P., Kubik, P.W. and Zech, W., Evidence for long-lasting |  | Zech, Michael, Tuthorn, Mario, Detsch, Florian, Rozanski, Kazimierz, Zech, Roland, Zöller, Ludwig, Zech, Wolfgang, Glaser, Bruno (2013) A 220ka terrestrial δ18O and deuterium excess biomarker record from an eolian permafrost paleosol sequence, NE-Siberia. Chemical Geology, 360. 220-230 doi:10.1016/j.chemgeo.2013.10.023 | Journal (article/letter/editorial) | | Michael Zech a,b,c,⁎, Mario Tuthorn a,b, Florian Detsch a,b, Kazimierz Rozanski d, Roland Zech e, Ludwig...Ludwig Zöller a, Wolfgang Zech f, Bruno Glaser c a Chair of Geomorphology, University of Bayreuth, Universitätsstr...analyses of hemicellulose sugar biomarkers in soils (Zech and Glaser, 2009. RCM 23, 3522-3532), we here present...author. E-mail address: michael_zech@gmx.de (M. Zech). 0009-2541/$ – see front matter © 2013 Elsevier...latitudes, the so-called “temperature effect” is M. Zech et al. / Chemical Geology 360–361 (2013) 220–230 |  | Song, Yougui, Luo, Dan, Du, Jinhua, Kang, Shugang, Cheng, Peng, Fu, Chaofeng, Guo, Xiaohua (2018) Radiometric dating of late Quaternary loess in the northern piedmont of South Tianshan Mountains: Implications for reliable dating. Geological Journal, 53. 417-426 doi:10.1002/gj.3129 | Journal (article/letter/editorial) | | Academy of Sciences, No 97 Yanxiang Road, Yanta District, Xi'an, Shaanxi, 710061, China. Email: syg@ieecas...trumpet‐shaped basin Bettis, 2013; Wang et al., 2014; Zech et al., 2017). Recently, attempts opens to the...Asian loess. materials such as bulk n‐alkanes (Zech et al., 2017) and earthworm The main reason for...for the underestimation of 14 C ages may be calcite granules (Moine et al., 2017; Prud'homme et al....materials such as bulk n‐alkanes (Zech et al., 2017) and earthworm calcite granules (Moine et al., 2017; |  | | Report (issue) | | Colorado and Northwestern New Mexico By Robert S. Zech, Richard L. Reynolds, Joseph G. Rosenbaum, and Isabelle...Colorado and Northwestern New Mexico / by Robert S. Zech ... [et al.]. p. cm. (Geologic studies of the Ute...Placer deposits Ute Mountain Indian Reservation. I. Zech, R. S. II. Series. III. Series: U.S. Geological...COLORADO AND NORTHWESTERN NEW MEXICO By Robert S. Zech, Richard L. Reynolds, Joseph G. Rosenbaum, and Isabelle...local landward shifting of depositional facies (Zech and Wright Dunbar, 1989; Wright and others, 1989) |  | | Journal (article/letter/editorial) | | overliesa basinand rangetopograGeologyof the Lubin District phyin whichbasinssuchasthe Lubinbasinarefilled...northeastandtheWerra anhydriteandsalthorizons.The Zech- ern marginof the Fore-Sudeticblock toward the stein...metal sourceof non-ferrousmineralizationsin the Zech- steinbasement(Kupferschiefer-type), in Fedak,J...Rydzewski, A., 1978,Oxidation facies ofthecopper-bearing Zech- steinshalein the Fore-Sudeticmonocline:PrzegladGeologicorganic...v. 81, p. 1823-1837. 1987, Formationof sulfide-calcite veinletsin the Kupfer- mary). Tooms,J. S., 1970 |  | Demény, Attila, Schöll-Barna, Gabriella, Sümegi, Pál, Sipos, Péter, Fórizs, István, Balázs, Brigitta Réka, Bajnóczi, Bernadett, Cook, Gordon (2012) Stable isotope compositions of bivalve shells and geochemistry of bulk sediments in a 5–20 ky fluvial section at Körösladány, SE Hungary: Sedimentary changes vs. climate signals. Central European Geology, 55 (4) 417-439 doi:10.1556/ceugeol.55.2012.4.4 | Journal (article/letter/editorial) | | geologic and geochemical analyses in the clay quarry which is located at the edge of the village of...the section has been destroyed by the use of the quarry material prohibiting further, higher-resolution...Standardization was conducted using laboratory calcite standards calibrated against the NBS-19 standard...generally below 10 wt.%. Between 300 and 375 cm the calcite content rises to 10–13 wt.% with a concomitant...carbonate amount is low with a relatively elevated calcite/dolomite ratio (expressed as Xcalcite in the bulk |  | | Journal (article/letter/editorial) | | redstones [Rotliegendes) and the Zechstein series. The Zech stein deposits extend over areas encompassing about...structures. In the Northern Sudeten trough, the Zech. stein deposits have been prospected in two synclines...dolomitic-marly and bituminous shales. Besides dolomite, calcite and minerals characteristic of muds, the shales...gypsum, muscovite and sulfides. The gypsum and calcite sometimes appear as veinlets and concretions. The...in these are filled with gypsum, anhydrite and calcite. The thickness of the carbonate rocks ranges from |  | | Journal (article/letter/editorial) | | the variability of δ18O values in speleothem calcite, can result from multiple effects, including the...paleoclimate reconstruction (Calderoni and Schnitzer, 1984; Zech et al., 1997; Polk et al., 2007). They adsorb onto...particles that allow their inclusion in cave sediments (Zech et al., 1997). In addition, they are the most contemporaneous...vegetal change at the time of their deposition (Zech et al., 1997; Zalba and Quiroga, 1999; Webb et al...and by the Southwest Florida Water Management District (SWFWMD) Award 07PO0001372. References Boutton |  | Perrette, Yves, Delannoy, Jean-Jacques, Desmet, Marc, Lignier, Vincent, Destombes, Jean-Luc (2005) Speleothem organic matter content imaging. The use of a Fluorescence Index to characterise the maximum emission wavelength. Chemical Geology, 214 (3) 193-208 doi:10.1016/j.chemgeo.2004.09.002 | Journal (article/letter/editorial) | | the relatively stable chemical environment of calcite growth, changes in the Fluorescence Index can be...to those used in the discontinuous sampling of calcite for isotopic analyses (Berstad et al., 2002; Genty...homogenous (improbable due to the complexity of calcite crystal growth). These two assumptions need to...methods have been developed to detect changes in calcite trace element content across the speleothem. Although...spectrometric, spatially resolved analysis of OM in calcite and continuous fluorescence imaging. This technical |  | | Journal (issue) | | Although the mines of the Illinois-Kentucky fluorite district are no longer active, the thrill of discovery...made in early May at the Hastie ' s Mining Co. quarry near Cave in Rock. I have vis ited this site more...during the preparation of my major article on the district (Goldstein, 1997). Geophysics professor Hal Noltimier...Buslovich (Smolikova 900156, Ruzyne, Prague 6, 16100 C zech Republic) was selling a few copper specimens with...clusters of the same type with gray branching calcite with brilliant pyritohedrons of pyrite to 3/8 inch |  | | Journal (article/letter/editorial) | | surface exposure dating R. Zech, B. Glaser, P. Sosin, P.W. Kubik and W. Zech . . . . . . . . . . . . ....other trace elements in recrystallized aragonite–calcite speleothems from caves in the Pyrenees (France): |  | | Journal (article/letter/editorial) | | waters from Permian layers in the Kupferschiefer district and at the deeper levels of the mines in the Upper...Brocken pluton is dated at about 283 million years (Zech et al., 2010). The Palaeozoic basement is unconformably... and Bad Grund are found, the St. Andreasberg district with a similar main mineralogy has in addition...strike length, mainly carry fluorite, quartz and calcite combined with minor ore minerals such as chalcopyrite...given in meter above sea level (a.s.l.). Mining district Upper Harz Mountains Mines around Clausthal Mine |  | | Report (issue) | | Apatite 0.19 0.19 0.10 FR 0.11 0.07 0.12 Calcite 0.02 0.07 0.05 traverses through the stock... pyrite, chalcopyrite, tourmaline, magnetite, calcite, and iron oxides are variously present in small...of the dikes. ACKNOWLEDGMENTS Tom Nash and Rob Zech were part of the original team that mapped the Ibapah...Bulletin 77, 120p. Cadigan, R. A., Nash, J. T., Zech, R. S. , Wallace, A. R., Hills, F. A., and Robinson...921-951. Nolan, T. B., 1935, The Gold Hill mining district, Utah: U.S. Geological Survey Professional Paper |  | | Journal (issue) | | a 10-cm crystal o f franklinite em bedded in calcite w ith banded ore (Fig. 3), w as collected on the...3T v.15/#5 Jacupiranga m ine (Brazil), Jensen quarry (CA ), Cunha B aixa m ine, Paulkerrite $10 v.15/#6...Peak, CSM M useum $10 v .l7 /# 3 K nappenw and (Austria). Laurium (Greece), Senaite (Brazil), C halcophyllite...leiberg (A ustria), ties, Urucum (Brazil), K alkar quarry (CA ), K rem sm iinster $10 B rochantite (O K...xinites (CA). $10 v.20/#6 Spanish Pyrite, P in t’s quarry (IA ), B eaverdell (Br. Col.), H ollister (CA) |  | Li, Xiuli, Hu, Chaoyong, Huang, Junhua, Xie, Shucheng, Baker, Andy (2014) A 9000-year carbon isotopic record of acid-soluble organic matter in a stalagmite from Heshang Cave, central China: Paleoclimate implications. Chemical Geology, 388. 71-77 doi:10.1016/j.chemgeo.2014.08.029 | Journal (article/letter/editorial) | | these proxies, the carbon isotope composition of calcite (δ13Ccarb) has been widely investigated and is...low but constant ASOM content (0.12–0.14 mg/g calcite). The ASOM concentration is similar with the TOC...concentration in Blyth et al. (2013a; 0.11 mg/g calcite), but lower than the TOC concentration in BW-1...Beijing, China (Duan et al., 2014; 0.6–2.5 mg/g calcite). The isotopic compositions of our samples were...of fractionation occurring during degassing and calcite deposition (Fig. 4), the majority of the δ13CASOM |  | | Report (issue) | | characteristics of the Jackpile deposit, Laguna district.................................................primary deposits in the Ambrosia Lake uranium district..................................12 7. Chemical...secondary deposits in the Ambrosia Lake uranium district..................................13 Table Table...deposit, Mariano Lake deposit, and the Ambrosia Lake district indicates that primary ore-forming processes concentrated...the redistributed deposits in the Church Rock district to the primary deposits in the Grants uranium |  | | Report (issue) | | with Mother Lode-Type Gold Mineralization, Hodson District, Calaveras County, California CHAFFEE, M.A., AND..., COBBAN, W.A., FRANCZYK, K.J., PILLMORE, C.L., ZECH, R.S., KAUFFMAN, E.G., HOLBROOK, J.M., AND WOLFE...WITH MOTHER LODE-TYPE GOLD MINERALIZATION, HODSON DISTRICT, CALAVERAS COUNTY, CALIFORNIA CHAFFEE, M.A., AND...AND KUHL, T.O. ABSTRACT The Hodson district lies along the West Gold Belt, about 17 km west of the main...and has many splays. The three orebodies in the district contain zones of altered rock that surround the |  | | Journal (article/letter/editorial) | | annual rainfall (cm) 124.5 109.0 88.3 Quartz, calcite, dolomite, albite and muscovite were detected in...action’ and ‘moderate chemical’ classes. Quartz, calcite, dolomite, albite and muscovite were detected in...are represented by open circles. Bäumler, R., Zech, W., Heuberger, H. and WeberDiefenbach, K. (1991) |  | | Report (issue) | | and others, 1980) (fig. 1), the largest uranium district in the United States. Eight cores were obtained;... Santos, and others (1981), Zech, Hammond~ and others (1981 ), and Zech, Kirk, and others (1981 ). One...Canyon Member mainly because of the presence of calcite in five samples; these samples have unusually low...determined to be carbonate carbon. The presence of calcite in these samples is confirmed by their higher calcium...presumably reside mainly in calcite. The major feature in the ore zone is the calcite cement in the lowest three |  | | Report (issue) | | on the base of the Dakota Sandstone (Thaden and Zech, 1984). Immediately adjacent to the structural...extent of leaching, and degree of pore filling by calcite and anhydrite. Average porosity is about 11 percent...Vincelette and Chittum (1981) were found in the Entrada (Zech and others, 1985). None of these have been drilled...across the Hogback monocline (fig. 3) (Thaden and Zech, 1984). Timing and migration In the northern part...fragments. Cementing material averages 60 percent calcite, 30 percent clay, and 10 percent silica. Average |  | | Journal (issue) | | such by the Czech Geological Survey, Prag ue, C zech Republic mineralogists Dr. Frantisek Veseleovsky...second after the reported occurre nce in Quartzburg District, Grand County , Oregon. The heteroge nite is not...Stevens fro m Schwan.:walder Mine, Raston Buttes District. Huerfago County. Col o rado labelled as uraninite...piles (30 tons) donated and staffed by Liter's Quarry of Indiana. * Door prizes Proceeds benefit the...New Mineral Finds Continued from page 2 Pontal District, Governador Valadares, Minas Gerais, Brazil. This |  | | Report (issue) | | or redistributed) deposits in the Ambrosia Lake district of New Mexico. Both the similarities and differences...characterize the secondary deposits of the Ambrosia Lake district was taken from Spirakis and others (1981). Additional...coast, and Jurassic rocks of the Ambrosia Lake district of New Mexico. For each of these groups, data...available on altered rocks in the Ambrosia Lake district, and the number of analyses of altered rock in...Some of the samples from the Powder River Basin district were near-surface samples that are believed to |  | | Journal (article/letter/editorial) | | early versus late formation, percent of included calcite, or to size, shape, or texture. There is also no...at the base of the Late Permian marine-evaporite Zech- 90 & ~ m I ( ) 1701, 9 1704 9 1702,1705, 1706...samples used in this study. Inset is of Lubin ore district. Zechstein basin is outlined by stippled pattern...1711-Czerwona Woda; massive like the galena in ~ 1716ore district. Chalcopyrite and ga- Pyrite and marcasite Pyrite...rock material and intergrown, possibly coeval, calcite (Table 1). The sul- Isotope fractionation processes |
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