https://www.simonhohl-research.net/news daily 0.75 2021-07-02 https://images.squarespace-cdn.com/content/v1/590013959de4bbfcf0ebb7ec/1493884879299-XC2MLBJVG3BH7TS0OQZK/fullsizeoutput_1ae6.jpeg GEOSCIENCE NEWS https://www.simonhohl-research.net/news/2021/7/2/join-us-on-goldschmidt-virtual-session-13h-ancient-sedimentary-records-of-past-ocean-biogeochemistry monthly 0.5 2023-03-24 https://images.squarespace-cdn.com/content/v1/590013959de4bbfcf0ebb7ec/cd6f6a8e-0460-446c-9619-c5597cc4744f/Screenshot+2023-03-24+at+14.46.34.png GEOSCIENCE NEWS - Join us on Goldschmidt's 2023 Session: - Make it stand out Whatever it is, the way you tell your story online can make all the difference. https://www.simonhohl-research.net/news/2021/3/2/small-review-on-geochemical-tools-used-in-stromatolite-research-published-on-public-earth-science-wechat-account-in-chinese monthly 0.5 2021-03-02 https://images.squarespace-cdn.com/content/v1/590013959de4bbfcf0ebb7ec/1614656459672-2HHLL2M4F4MNNOFS6GCN/image.png GEOSCIENCE NEWS - Small review on geochemical tools used in stromatolite research published on public Earth Science Wechat account (in Chinese) click the image for the original text (in Chinese) https://images.squarespace-cdn.com/content/v1/590013959de4bbfcf0ebb7ec/1614656427279-Y5IPWV9URAWKC9WK5EL3/image.png GEOSCIENCE NEWS - Small review on geochemical tools used in stromatolite research published on public Earth Science Wechat account (in Chinese) Simplified element cycling in microbial habitats (Figure courtesy S.Hohl) https://www.simonhohl-research.net/news/2021/3/1/new-publication-of-our-team-on-nature-communications-exceptionally-preserved-early-metazoans-discovered-in-mongolia monthly 0.5 2021-03-02 https://images.squarespace-cdn.com/content/v1/590013959de4bbfcf0ebb7ec/1614594640798-R2G1JWD44CD2JDFKSC8G/J6vL9huS2OnUycvbl88n_Image+Blog+one+layer.jpg GEOSCIENCE NEWS - New publication of our Team on Nature Communications. Steiner et al., ‘Exceptionally preserved early metazoans discovered in Mongolia’ https://www.simonhohl-research.net/news/2019/4/2/lm7d3ecnbgnqbektq2rbx7q27jo9ja monthly 0.5 2019-04-02 https://images.squarespace-cdn.com/content/v1/590013959de4bbfcf0ebb7ec/1554188252019-CAB4PWLBRG9C59L0ZZ5H/X%E5%B1%95%E6%9E%B6ENG%E6%8B%9B%E8%81%98.jpg GEOSCIENCE NEWS - School of Ocean and Earth Science hiring international top talents https://www.simonhohl-research.net/news/2019/3/22/new-job-at-tongji-university monthly 0.5 2019-04-02 https://www.simonhohl-research.net/news/2019/3/22/convening-session-7f-at-goldschmidt-2019 monthly 0.5 2019-03-22 https://www.simonhohl-research.net/news/2018/1/23/convening-a-session-at-egu-vienna-2018 monthly 0.5 2018-01-23 https://www.simonhohl-research.net/news/2018/1/23/groundbreaking-new-hypothesis-on-why-life-diversified-on-earth-after-the-cambrian-explosion monthly 0.5 2018-01-23 https://www.simonhohl-research.net/news/2017/7/24/w38ypdxofn0u4s6tvtxdtw8fzsuedz monthly 0.5 2017-07-24 https://www.simonhohl-research.net/news/2017/7/24/human-made-aerosols-identified-as-driver-in-shifting-global-rainfall-patterns-1 monthly 0.5 2017-07-24 https://www.simonhohl-research.net/news/2017/5/4/ocean-acidification-may-hamper-food-webs-nitrogen-fixing-heroes monthly 0.5 2017-05-04 https://www.simonhohl-research.net/news/2017/4/27/early-organic-carbon-got-deep-burial-in-mantle monthly 0.5 2017-04-27 https://www.simonhohl-research.net/news/2017/4/26/geoscience-news-s-v-hohl-geologist-geochemist-geoconsultant monthly 0.5 2017-04-27 https://www.simonhohl-research.net/fieldwork daily 0.75 2021-03-01 https://images.squarespace-cdn.com/content/v1/590013959de4bbfcf0ebb7ec/1614593828674-DXDCLARHCM6TWVZRGQVJ/Z4x5qbQORJqbTynTPFlb_2021-01-10+%281%29.jpg FIELDWORK - Mongolia Khøvsgol 2019 https://images.squarespace-cdn.com/content/v1/590013959de4bbfcf0ebb7ec/1500881192707-KCJZQ0W8L8OE8VOIF9GD/IMG_9312.jpg FIELDWORK - Gobi Altai, Mongolia 2017 Cambrian Bioherms and Stromatolites https://images.squarespace-cdn.com/content/v1/590013959de4bbfcf0ebb7ec/1497940587032-YTK7VEN2XA56ABL9EGQ6/image-asset.jpeg FIELDWORK - Southwest China 2017 Cryogenian to Cambrian Lithologies https://images.squarespace-cdn.com/content/v1/590013959de4bbfcf0ebb7ec/1493960047272-IHH18MGJ7GVJCS9C5VU6/DSC00253.jpg FIELDWORK - Indonesia 2008 Indonesia 2008 https://images.squarespace-cdn.com/content/v1/590013959de4bbfcf0ebb7ec/1493960767418-4VI2YLYO6YRG6QTUYK41/DSC00254.jpg FIELDWORK - Balmuccia 2011 Ivrea 2011 https://images.squarespace-cdn.com/content/v1/590013959de4bbfcf0ebb7ec/1493961883435-QRJNTKJRECBYFQ3DCXNY/image-asset.jpeg FIELDWORK - Mt. Fuji 2015 Volcano Trekking https://images.squarespace-cdn.com/content/v1/590013959de4bbfcf0ebb7ec/1493964158519-T3MJ93HJ7NGYXIBP0S7Z/P1030534.jpg FIELDWORK - Fermor Meeting UK 2012 Precambrian/Cambrian Geology Meeting and Workshop https://images.squarespace-cdn.com/content/v1/590013959de4bbfcf0ebb7ec/1493960307535-16PANNHU7GZ8P1RQEBH2/IMG_0515+copy.JPG FIELDWORK - SouthWest China 2012 Southwest China 2012 https://images.squarespace-cdn.com/content/v1/590013959de4bbfcf0ebb7ec/1493961967179-82OIX64HOTRIN10DSRQ0/image-asset.jpeg FIELDWORK - Vanuatu 2008 Volcano Trekking https://images.squarespace-cdn.com/content/v1/590013959de4bbfcf0ebb7ec/1493959828141-HJFFO5EWOAS3XC5P2WV5/DSC08738.jpg FIELDWORK - Papua NewGuinea 2008 Papua New Guinea 2008 https://images.squarespace-cdn.com/content/v1/590013959de4bbfcf0ebb7ec/1493959948148-J8C1I26QF86YEWXB1DVQ/DSC05921.jpg FIELDWORK - Sifnos 2010 Cyclades, Sifnos 2010 https://images.squarespace-cdn.com/content/v1/590013959de4bbfcf0ebb7ec/1493961453974-RULWFQ6N0XTED5MJLWC4/image-asset.jpeg FIELDWORK - Ivrea 2007 Structural Geology Workshop https://images.squarespace-cdn.com/content/v1/590013959de4bbfcf0ebb7ec/1493964001796-IFOF1FR3EUMLKMTPIEKS/image-asset.jpeg FIELDWORK - Three Gorges 2016 Ediacaran meetiung and workshop https://images.squarespace-cdn.com/content/v1/590013959de4bbfcf0ebb7ec/1493962057223-HHTYO8A9QF16L3O2T12X/image-asset.jpeg FIELDWORK - Carribean 2012 Volcano Trekking https://images.squarespace-cdn.com/content/v1/590013959de4bbfcf0ebb7ec/1493960728957-1VP9N0K3VIODIEPLI1ZY/DSC02259.jpg FIELDWORK - Ecuador 2010 Ecuador 2010 https://images.squarespace-cdn.com/content/v1/590013959de4bbfcf0ebb7ec/1500881795384-ELORKQY3KX0XX8EO1212/IMG_9165.jpg FIELDWORK https://www.simonhohl-research.net/pagecv daily 0.75 2023-03-24 https://images.squarespace-cdn.com/content/v1/590013959de4bbfcf0ebb7ec/1553244699005-LEIQ3J7R23F0350KKHV1/1.jpg CV - Simon V. Hohl Diplom Geologist, PhD https://images.squarespace-cdn.com/content/v1/590013959de4bbfcf0ebb7ec/1493189979884-CYUP7ZPBG2RE6JQHPF65/IMG_3327.JPG CV https://www.simonhohl-research.net/what-we-do daily 0.75 2023-03-24 https://images.squarespace-cdn.com/content/v1/590013959de4bbfcf0ebb7ec/1614663351132-TFEGW17IR14LVZDZXCMJ/WechatIMG218.jpeg About me https://images.squarespace-cdn.com/content/v1/590013959de4bbfcf0ebb7ec/730aedad-e769-406f-929f-b883b3902fbb/Screenshot+2023-03-24+at+13.35.47.png About me - Make it stand out Whatever it is, the way you tell your story online can make all the difference. https://images.squarespace-cdn.com/content/v1/590013959de4bbfcf0ebb7ec/1614663395688-GOCL5X6G3S19QR773MJO/WechatIMG217.jpeg About me https://images.squarespace-cdn.com/content/v1/590013959de4bbfcf0ebb7ec/a46a9894-bf40-42e8-8e77-653398d8a922/Screenshot+2023-03-24+at+13.35.31.png About me - Make it stand out Whatever it is, the way you tell your story online can make all the difference. https://images.squarespace-cdn.com/content/v1/590013959de4bbfcf0ebb7ec/1614657421618-LZ7XGE7Z5AN3DFTYF9SH/image.png About me - Cambrian Stromatolite Reef, Mongolia photo: S.Hohl https://images.squarespace-cdn.com/content/v1/590013959de4bbfcf0ebb7ec/1614657426565-DIJBYD2GCSNR9O7CYEB1/image.png About me - Archean stromatolites at Strelley pool, W-Australia photo: S. Viehmann https://images.squarespace-cdn.com/content/v1/590013959de4bbfcf0ebb7ec/1614657411718-JK2JHEF1M3QBYNV3437X/image.png About me - active stromatolites at Shark Bay, W-Australia photo: S. Viehmann https://images.squarespace-cdn.com/content/v1/590013959de4bbfcf0ebb7ec/1614658519499-T46Y7PZPK0NSPUQW95AS/WechatIMG212.jpeg About me - Cambrian Stromatolites, Chongqing China photo: S. Hohl https://images.squarespace-cdn.com/content/v1/590013959de4bbfcf0ebb7ec/1614658525113-B2MLDY0CJGJEG5FB8FCK/WechatIMG213.jpeg About me - Neoproterozoic stromatolites, Anhui China photo: S. Hohl https://images.squarespace-cdn.com/content/v1/590013959de4bbfcf0ebb7ec/1614657971966-5Z448O7N1KWZ09JT6XX3/Jinshanzhai+TOF+conc.+images.png About me - LA TOF-ICP MS element map of stromatolite courtesy: S. Hohl https://images.squarespace-cdn.com/content/v1/590013959de4bbfcf0ebb7ec/1614658008104-AP2N2LHDL9BVVZBXMWXL/6.1a+drillcore.jpeg About me - Archean stromatolite slab with drill cores for isotope analysis courtesy: S. Hohl https://images.squarespace-cdn.com/content/v1/590013959de4bbfcf0ebb7ec/1614658098081-PXTG7C5PE2LBOTDEYP0Z/AUT-RK_5a001.jpg About me - Neogene stromatolite slab, Ritzing Austria photo: S. Hohl https://images.squarespace-cdn.com/content/v1/590013959de4bbfcf0ebb7ec/1493194315043-2C5E3RWR3U30I4XH2C8W/IMG_4920.jpg About me https://www.simonhohl-research.net/projects daily 0.75 2023-03-24 https://images.squarespace-cdn.com/content/v1/590013959de4bbfcf0ebb7ec/32b29019-7cb8-4f09-a844-f357bc1e1bc8/Screenshot+2023-03-24+at+13.34.25.png Projects - Make it stand out Whatever it is, the way you tell your story online can make all the difference. https://images.squarespace-cdn.com/content/v1/590013959de4bbfcf0ebb7ec/1679635764481-93VKFC024UOUY91Q02RU/Screenshot+2023-03-24+at+13.29.42.png Projects https://images.squarespace-cdn.com/content/v1/590013959de4bbfcf0ebb7ec/1679635812937-V05XI093GGE3BEY7HKCV/Screenshot+2023-03-24+at+13.30.20.png Projects https://images.squarespace-cdn.com/content/v1/590013959de4bbfcf0ebb7ec/1679635841379-OXJ6L0YUTRCKE2QFFDKK/Screenshot+2023-03-24+at+13.30.28.png Projects https://images.squarespace-cdn.com/content/v1/590013959de4bbfcf0ebb7ec/1679635866117-ICDLKSDVYUDL0E0JDLKI/Screenshot+2023-03-24+at+13.30.33.png Projects https://images.squarespace-cdn.com/content/v1/590013959de4bbfcf0ebb7ec/1679635867207-BPNN4PA5AZ89P1XTZBCQ/Screenshot+2023-03-24+at+13.30.40.png Projects https://images.squarespace-cdn.com/content/v1/590013959de4bbfcf0ebb7ec/1679635877063-8YUQUJWTBZ0QC7GT02SI/Screenshot+2023-03-24+at+13.30.45.png Projects https://images.squarespace-cdn.com/content/v1/590013959de4bbfcf0ebb7ec/9410b4d7-15e2-4534-b015-f7ec5df10a09/Screenshot+2023-03-24+at+13.35.54.png Projects - Make it stand out Photograph of living microbial mats on the left taken from Vasconcelos et al., 2006 https://images.squarespace-cdn.com/content/v1/590013959de4bbfcf0ebb7ec/97736bb7-3843-49e1-b94f-bd2f61453c50/Screenshot+2023-03-24+at+13.33.37.png Projects - Make it stand out building blocks of the NSFC project “ The stromatolite Geochemical Archive” https://images.squarespace-cdn.com/content/v1/590013959de4bbfcf0ebb7ec/26cb9e74-efc9-4c66-8b7c-2583c7f8eab7/Screenshot+2023-03-24+at+13.36.00.png Projects - Make it stand out Whatever it is, the way you tell your story online can make all the difference. https://images.squarespace-cdn.com/content/v1/590013959de4bbfcf0ebb7ec/87dfe974-da46-43cb-8cc4-8fa6c476edc9/Screenshot+2023-03-24+at+13.36.10.png Projects - Make it stand out Whatever it is, the way you tell your story online can make all the difference. https://images.squarespace-cdn.com/content/v1/590013959de4bbfcf0ebb7ec/fb1957c4-6caf-4797-a0c7-126ead6598d4/Screenshot+2023-03-24+at+13.36.23.png Projects - Make it stand out Whatever it is, the way you tell your story online can make all the difference. https://images.squarespace-cdn.com/content/v1/590013959de4bbfcf0ebb7ec/22f24a71-fcc5-44c9-9a3e-6807b6e76015/Screenshot+2023-03-24+at+13.36.19.png Projects - Make it stand out Whatever it is, the way you tell your story online can make all the difference. https://images.squarespace-cdn.com/content/v1/590013959de4bbfcf0ebb7ec/1493881569929-GQ2K1TGSTW1Y0RORDRF5/DSCF2170.JPG Projects https://www.simonhohl-research.net/researchgate daily 0.75 2019-03-22 https://images.squarespace-cdn.com/content/v1/590013959de4bbfcf0ebb7ec/1553249418896-2UV0U13BR9T92M2OORWH/Untitled.JPG Researchgate https://images.squarespace-cdn.com/content/v1/590013959de4bbfcf0ebb7ec/1493878935459-Y2WRDHE4KHNYTHN53FY9/fullsizeoutput_c4.jpeg Researchgate https://www.simonhohl-research.net/take-action daily 0.75 2017-04-27 https://images.squarespace-cdn.com/content/v1/590013959de4bbfcf0ebb7ec/1493191034279-PYANZ3FPRLTFP17R8V1Z/fullsizeoutput_4b1.jpeg Consulting https://www.simonhohl-research.net/publication-list daily 0.75 2023-03-24 https://images.squarespace-cdn.com/content/v1/590013959de4bbfcf0ebb7ec/1493190555719-WTVWNQT8RHUULN5PLHLG/fullsizeoutput_491.jpeg Publication list https://www.simonhohl-research.net/home daily 1.0 2023-03-24 https://images.squarespace-cdn.com/content/v1/590013959de4bbfcf0ebb7ec/1493186335796-8CTR7LFW85H8Y1N8ZDJW/DSC06925.jpg Home - About My Research https://images.squarespace-cdn.com/content/v1/590013959de4bbfcf0ebb7ec/1493186173704-5ENSF3SGZZAQDIJD7V3B/image-asset.jpeg Home - Take Part Become a Research Cooperator or ask for Consulting https://images.squarespace-cdn.com/content/v1/590013959de4bbfcf0ebb7ec/1493183457167-G1JALHP8EKODJMHLR0PG/IMG_2547.jpg Home https://www.simonhohl-research.net/labwork daily 0.75 2021-03-01 https://images.squarespace-cdn.com/content/v1/590013959de4bbfcf0ebb7ec/1507269751933-2U35XDEJQK6U95UQEBXU/CD_ID_Mainz+-+2.jpg LABWORK https://images.squarespace-cdn.com/content/v1/590013959de4bbfcf0ebb7ec/1507269118756-NVIAPLQ6854PNN1RE3C9/CD_ID_Mainz+-+14.jpg LABWORK https://images.squarespace-cdn.com/content/v1/590013959de4bbfcf0ebb7ec/1493279884243-3SIED8C8RQQ9W62ZQ33T/IMG_7255.JPG LABWORK https://www.simonhohl-research.net/contact daily 0.75 2021-03-01 https://images.squarespace-cdn.com/content/v1/590013959de4bbfcf0ebb7ec/1493187277109-83MNWPU1ECPPZTAWMHN7/IMG_2545.jpg Contact https://www.simonhohl-research.net/partners daily 0.75 2023-03-24 https://images.squarespace-cdn.com/content/v1/590013959de4bbfcf0ebb7ec/1493880558864-13AJ3YB1A3MSAFNPVRL9/image-asset.jpeg Research Partners https://images.squarespace-cdn.com/content/v1/590013959de4bbfcf0ebb7ec/1493880857853-G9D2CDC4NHQN9GESRFW1/image-asset.jpeg Research Partners https://images.squarespace-cdn.com/content/v1/590013959de4bbfcf0ebb7ec/cdc6014f-8ab8-470f-9688-e2e3dd6c3c8d/R.45e9955639ce4d5d28bdfac583a21e58.jpeg Research Partners https://images.squarespace-cdn.com/content/v1/590013959de4bbfcf0ebb7ec/1493883454158-C0TZ18NAIW6OJABDLT9U/Uni+WIen.png Research Partners https://images.squarespace-cdn.com/content/v1/590013959de4bbfcf0ebb7ec/1493880365087-SBR2TWHK6C2UOHVC6MNP/search.jpg Research Partners https://images.squarespace-cdn.com/content/v1/590013959de4bbfcf0ebb7ec/e2ffd05a-8043-422f-95b5-7834a755386d/Screenshot+2023-03-24+at+14.41.04.png Research Partners - Prof. Seth John Professor John’s Marine Trace Element Laboratory (MTEL) studies the isotope geochemistry of trace-metals in order to understand how these crucial micronutrients support life in the modern ocean, and how they can be used as proxies to understand the history of biological and geological earth processes https://images.squarespace-cdn.com/content/v1/590013959de4bbfcf0ebb7ec/1553245646827-LU51EJ1LT8EA3RBACTYL/1200px-Tongji_Uni_logo.svg.png Research Partners - Prof. Dr. Shouye Yang Specialist in provenance analyses of river sediments using various geochemical tools https://images.squarespace-cdn.com/content/v1/590013959de4bbfcf0ebb7ec/d099ef47-ed7b-4817-b320-86999289465c/1556635781496.jpeg Research Partners https://images.squarespace-cdn.com/content/v1/590013959de4bbfcf0ebb7ec/1493879363804-6KRJ24AVP3FV2SSICSKI/image-asset.jpeg Research Partners https://images.squarespace-cdn.com/content/v1/590013959de4bbfcf0ebb7ec/1493883615684-59OMUUM1GXU2AK68U3Y8/NJU-Logo.png Research Partners https://images.squarespace-cdn.com/content/v1/590013959de4bbfcf0ebb7ec/1493883499671-Z20XC2W1QQDAJGKMFG1D/image-asset.jpeg Research Partners https://images.squarespace-cdn.com/content/v1/590013959de4bbfcf0ebb7ec/1493882325035-G7H7879EYVLR1IG7QLYT/IMG_2544.JPG Research Partners https://www.simonhohl-research.net/open-access-publications daily 0.75 2021-07-02 https://images.squarespace-cdn.com/content/v1/590013959de4bbfcf0ebb7ec/1614665515604-E80OEAB6X0A1K6CFGBYK/J6vL9huS2OnUycvbl88n_Image+Blog+one+layer.jpg Open Access Publications - Exceptionally preserved early Cambrian bilaterian developmental stages from Mongolia Fossilized invertebrate embryonic and later developmental stages are rare and restricted largely to the Ediacaran-Cambrian, providing direct insight into development during the emergence of animal bodyplans. Here we report a new assemblage of eggs, embryos and bilaterian post-embryonic developmental stages from the early Cambrian Salanygol Formation of Dzhabkan Microcontinent of Mongolia. The post-embryonic developmental stages of the bilaterian are preserved with cellular fidelity, possessing a series of bilaterally arranged ridges that compare to co-occurring camenellan sclerites in which the initial growth stages retain the cellular morphology of modified juveniles. In this work we identify these fossils as early post-embryonic developmental stages of camenellans, an early clade of stem-brachiopods, known previously only from isolated sclerites. This interpretation corroborates previous reconstructions of camenellan scleritomes with sclerites arranged in medial and peripheral concentric zones. It further supports the conjecture that molluscs and brachiopods are descended from an ancestral vermiform and slug-like bodyplan. https://images.squarespace-cdn.com/content/v1/590013959de4bbfcf0ebb7ec/1516686659235-DZGUO0WPCTYH3XXU4XXK/nFig.4_proof.png Open Access Publications - Geochemistry of Ediacaran cap dolostones across the Yangtze Platform, South China: implications for diagenetic modification and seawater chemistry in the aftermath of the Marinoan glaciation Cap dolostones of the Ediacaran Doushantuo Formation (Yangtze Platform, South China) from various palaeo-water depths were studied to evaluate the extent of their diagenetic alteration and to assess temporal and spatial variations of seawater chemistry in the aftermath of the Marinoan glaciation. Diagenetic fluid overprint is common in cap dolostone lithologies. However, the mobilization of trace elements and the modification of Sr and O isotopic compositions are variable and were controlled by multiple stages of fluid overprint. The highest 87Sr/86Sr ratios (up to 0.7246) occur in cap dolostones from the palaeo-slope environment at the Huanglianba section, whereas cap dolostones deposited in platform settings and in one of the distal basinal settings reveal 87Sr/86Sr ratios close to the proposed late Neoproterozoic seawater composition (0.7077). Shale-normalized REE + Y patterns of carbonate leachates display enrichments of heavy over light REE and superchondritic Y/Ho ratios, typical of seawater. However, Y/Ho ratios in the cap dolostones are always lower than modern seawater values, which is interpreted to reflect dilution of the seawater signal by continent-derived meltwater influx during deglaciation. Negative Ce anomalies in carbonate leachates from platform and slope sections suggest that oxidized conditions existed in shallow marine environments shortly after the Marinoan glaciation, whereas positive or no resolvable Ce anomalies in basin settings indicate that the latter remained anoxic. Redox stratification of the Yangtze margin at the beginning of the Ediacaran is further supported by the relative enrichment of redox-sensitive trace metals in basinal sections. These data may indicate moderately anoxic (less than 10µM dissolved O2) and presumably manganous conditions during the deposition of cap dolostones in the deeper realms of the Yangtze basin. https://images.squarespace-cdn.com/content/v1/590013959de4bbfcf0ebb7ec/1625207236737-IADEROEMLS50ESLRTH04/Fig.Cd.jpg Open Access Publications - Stromatolites as geochemical archives to reconstruct microbial habitats through deep time: Potential and pitfalls of novel radiogenic and stable isotope systems Understanding the origin and evolution of life on Earth and potentially other planets in our solar system is of fundamental interest for humanity. For the longest time in Earth's history, life evolved in microbial communities. It is, however, still incompletely understood how, when and where such habitable environments formed and how microbial communities adopted to the drastic changes of the atmosphere-hydrosphere-lithosphere systems through deep time. https://images.squarespace-cdn.com/content/v1/590013959de4bbfcf0ebb7ec/1614665039287-ND7G3K3EU3NL8VZ44ZBK/Screen+Shot+2021-03-02+at+2.03.41+PM.png Open Access Publications - Trace Metal and Cd Isotope Systematics of the Basal Datangpo Formation, Yangtze Platform (South China) Indicate Restrained (Bio)Geochemical Metal Cycling The behaviour of bioavailable trace metals and their stable isotopes in the modern oceans is controlled by uptake into phototrophic organisms and adsorption on and incorporation into marine authigenic minerals.Among other bioessential metals, Cd and its stable isotopes have recently been used in carbonate lithologies as novel tracer for changes in the paleo primary productivity and (bio)geochemical cycling. However, many marine sediments that were deposited during geologically highly relevant episodes and which, thus, urgently require study for a better understanding of the paleo environment are rather composed of a mixture of organic matter (OM), and detrital and authigenic minerals. In this study, we present Cd concentrations and their isotopic compositions as well as trace metal concentrations from sequential leachates of OM-rich shales of the Cryogenian basal Datangpo Formation, Yangtze Platform (South China). Our study shows variable distribution of conservative and bioavailable trace metals as well as Cd isotope compositions between sequential leachates of carbonate, OM, sulphide, and silicate phases. We show that the Cd isotope compositions obtained from OM leachates can be used to calculate the ambient Cryogenian surface seawater of the restricted Nanhua Basin by applying mass balance calculations. By contrast, early diagenetic Mn carbonates and sulphides incorporated the residual Cd from dissolved organic matter that was in isotopic equilibrium with deep/pore waters of the Nanhua Basin. Our model suggests that the Cd isotopic composition of surface seawater at that time reached values of modern oxygenated surface oceans. However, the deep water Cd isotope composition was substantially heavier than that of modern fully oxygenated oceans and rather resembles deep waters with abundant sulphide precipitation typical for modern oxygen minimum zones. This argues for incomplete recycling of Cd and other bioavailable metals shortly after the Sturtian glaciation in the redox stratified Cryogenian Nanhua Basin. Our study highlights the importance of sequential leaching procedures when dealing with impure authigenic sediments such as OM-rich carbonates, mudstones, or shales to achieve reliable trace metal concentrations and Cd isotope compositions as proxies for (bio)geochemical metal cycling in past aquatic systems. https://images.squarespace-cdn.com/content/v1/590013959de4bbfcf0ebb7ec/1516685941278-3ILXESSFB3F7URV3UKBZ/Fig.1_final-vers.jpg Open Access Publications - Cadmium isotope variations in Neoproterozoic carbonates - A tracer of biologic production? Cadmium concentrations and stable isotopic compositions in seawater are important tools for studying the biogeochemical cycling of Cd in the modern oceans and as a proxy for micronutrient utilisation by phytoplankton. It is now well established that Cd isotopes become “heavier” as the primary production in the surface ocean increases, even though the mechanism driving the isotopic fractionation is still debated. Here, we use this property of Cd isotopes to examine changes that took place in the oceans during the emergence of multicellular life in the Neoproterozoic. Isotopic compositions and concentrations of Cd, N and C are reported in shallow-water carbonates of Ediacaran age from the Xiaofenghe section on the Yangtze Platform, South China. The Cd isotope data - reported as ε112/110Cd - show positive excursions in the cap dolomites, while significantly lighter Cd is found in the overlying strata. After correction for salinity-controlled fractionation into inorganic calcite, calculated palaeo-seawater ε112/110Cdsw range from -2 to +1.5, overlapping values of modern surface seawater. Importantly, ε112/110Cdsw and δ13C show a general positive correlation, as would be expected in bio-productive environments. However, the trend to lighter ε112/110Cd up-section is not that explicitly expected for an “explosion of life” at the end of the Ediacaran. The upper Doushantuo also displays substantial fluctuations in REE abundances, δ15N and δ13C, which may be due to estuarine mixing. Our data suggest that the variations in ε112/110Cd are a result of biologically-induced fractionation in at least some of the Ediacaran carbonates at Xiaofenghe. Further Cd isotope fractionation processes are clearly playing a role as well, such as precipitation of sulphides under anoxic pore-water conditions and fractionation into inorganic carbonates under variable salinity conditions. These effects have to be evaluated carefully when using Cd isotope systematics in ancient marine carbonates to look for palaeo-productivity signals. https://images.squarespace-cdn.com/content/v1/590013959de4bbfcf0ebb7ec/1614664778038-DAT67RTQAHWIKG4QECUM/WechatIMG213.jpeg Open Access Publications https://www.simonhohl-research.net/my-team-supervised-and-cosupervised daily 0.75 2023-03-24 https://images.squarespace-cdn.com/content/v1/590013959de4bbfcf0ebb7ec/1614682952626-KMV496YH58O8O2C1KP7U/WechatIMG539.png My Team Yuxiang Jiang (PhD student) works on trace element mapping of carbonate rocks and in situ U-Pb dating in microbialites. https://images.squarespace-cdn.com/content/v1/590013959de4bbfcf0ebb7ec/dda7ad5c-5f55-4e20-8377-c32c8a66fd7a/Screenshot+2023-03-24+at+13.50.40.png My Team - Make it stand out Usman Abubakar (PhD student, China Marien Scholarship) works on trace elements and Cd isotopes in paleo marine mixed (clastic and carbonate) sediments spanning the major C perturbations during the Pleistocene and the Cretaceous OAE2 event. https://images.squarespace-cdn.com/content/v1/590013959de4bbfcf0ebb7ec/1614659628869-5VLC0KO10Q4PGF56XMH0/WechatIMG215.jpeg My Team Yibo Lin (PhD) Nanjing University PhD student, calibrated his own Ba Ds and is firm in Sr, Ba isotope and trace element analysis in a variety of lithologies. Fieldwork expertise in SW China. https://images.squarespace-cdn.com/content/v1/590013959de4bbfcf0ebb7ec/1614663932395-ZALW758JJR8O9NBZ1WPZ/WechatIMG1571.jpeg My Team Heping Ni (MSc) worked on trace element and Cd isotope systematics in a drill core from the South China sea spanning 14 marine isotope stages Graduated with honours in 2022. Congratulations Heping and all the best to you on your way! https://images.squarespace-cdn.com/content/v1/590013959de4bbfcf0ebb7ec/1614659456381-ICZ235YRLC4LOY6TWOX3/WechatIMG214.jpeg My Team Yinggang Zhang (PhD) Nanjing University PhD student, focusing on paleo-environmental recosntructions using a variety of different proxies such as C, S, Sr, Li and Cd isotopes as well as U-Pb dating. Fieldwork expertise in SW China and Tarim. https://images.squarespace-cdn.com/content/v1/590013959de4bbfcf0ebb7ec/1614659837909-GT5CKMS2JE1UU1R46QNK/WechatIMG216.jpeg My Team Zhongya Hu (Associate Researcher) expert in Mg isotope systematics with profound lab skills and fieldwork expertise in SW China. conducted a 3 year postdoc in my workgroup and was promoted in 2023 to associate researcher at Tongji, Congrats Zhongya! https://images.squarespace-cdn.com/content/v1/590013959de4bbfcf0ebb7ec/a6fb0bdd-2a49-4b77-89f8-ff5ce413df5c/Screenshot+2023-03-24+at+13.35.41.png My Team - Make it stand out Whatever it is, the way you tell your story online can make all the difference. https://www.simonhohl-research.net/home-alt-bedford daily 0.75 2025-05-08 https://images.squarespace-cdn.com/content/v1/52a74d9ae4b0253945d2aee9/1390500612440-PGQSIY8KL9F7T5VIXQLO/chambers-2.jpg Home Alt A better world Starts with a choice Contact Us https://images.squarespace-cdn.com/content/v1/52a74d9ae4b0253945d2aee9/1390500503574-5BAPXZO9U06UV61P49UO/chambers1.jpg Home Alt Sustainability Starts with you Join Us https://images.squarespace-cdn.com/content/v1/52a74d9ae4b0253945d2aee9/1390500933384-LII4SRIPHFYOUFX0UCXC/chambers-4.jpg Home Alt A better world Starts with a choice Join Us https://images.squarespace-cdn.com/content/v1/52a74d9ae4b0253945d2aee9/1390504287124-HQ8GNX1JCE22V047MSQ9/chambers-8.jpg Home Alt Preserve Nature Join Us