Paul C. Hackley William Gaspard O. Manga Moïse Bessong Javin J. Hatcherian Ethel K. Ashukem Alifa L. Guedala Arsène Meying Elias Samankassou 20250307 tabular digital data Reston, Virginia United States Geological Survey https://doi.org/10.5066/P13HEDGA https://www.sciencebase.gov/catalog/item/67605e25d34e03058f220792 William Gaspard O. Manga Paul C. Hackley Moïse Bessong Javin J. Hatcherian Ethel K. Ashukem Alifa L. Guedala Arsène Meying Elias Samankassou 2025 publication Reston, Virginia U.S. Geological Survey TBD The West and Central African Rift System (WCARS) refers to the series of Cretaceous rift basins where commercial hydrocarbon accumulations have been discovered. The Babouri-Figuil Basin (BFB) is an area of interest in terms of petroleum prospecting related to the WCARS. Many researchers have identified potential petroleum source rocks in the BFB. However, most of these studies have focused exclusively on the eastern part of the basin with limited outcrop samples that may not be representative of the entire basin. Hydrocarbon source rocks can vary considerably within a basin in terms of their lithology, and the quality, quantity and thermal maturity of the organic matter (OM). Understanding the distribution of source rocks in the whole BFB is thus essential for exploration purposes. An integrated facies analysis and organic and inorganic geochemical techniques were applied to the basin’s sedimentary rocks and the complete findings can be found in the larger work referenced in this data release. Here, you will find the total organic and programmed temperature pyrolysis data compiled for the study. Total organic carbon and programmed temperature pyrolysis data including calculated parameters were compiled for samples collected in the Babouri-Figuil Basin in northern Cameroon to better understand the distribution of source rocks in the entire basin, as much is known of the eastern region but not this area. This is essential for hydrocarbon exploration purposes in the region. The file contains data available in comma separated value (.csv) file format. The user must have software capable of opening and viewing a .csv file. 2024 ground condition Complete None planned 13.79000 13.95000 9.79000 9.75000 ISO 19115 Topic Category geoscientificInformation USGS Sedimentology Geochemistry None Source rocks Petroleum exploration USGS Metadata Identifier USGS:67605e25d34e03058f220792 None Babouri-Figuil Basin West Central Africa Rift System Common Geographic Places Cameroon None. Please see 'Distribution Info' for details. None. Users are advised to read the dataset's metadata thoroughly to understand appropriate use and data limitations. Paul C. Hackley U.S. Geological Survey Research Geologist mailing and physical

12201 Sunrise Valley Drive, Mail Stop 954

Reston Virginia 20192 USA 703-648-6458 phackley@usgs.gov Institute of Geological and Mining Research, Yaoundé, Cameroon School of Geology and Mining Engineering, Ngaoundere University, Meiganga, Cameroon Department of Earth Sciences, University of Geneva, Geneva, Switzerland No formal accuracy tests were conducted. Users are advised to read the metadata record carefully for additional details. Detailed process steps are provided for further information on methodology. No formal accuracy tests were conducted. Data set is considered complete for the information presented, as described in the abstract. Users are advised to read the rest of the metadata record carefully for additional details. No formal positional accuracy tests were conducted. No formal positional accuracy tests were conducted. Thomas Oliver Augusta Warden 2020 publication Lakewood, Colorado ERP Petroleum Geochemistry Research Laboratory https://doi.org/10.5066/P9X85HUF Digital and/or Hardcopy 2020 publication date Oliver and Warden, 2020 Sample prep for TOC analysis Mark Dreier Augusta Warden 2021 publication Lakewood, Colorado ERP Petroleum Geochemistry Research Laboratory https://doi.org/10.5066/P9HQSBGH Digital and/or Hardcopy 2021 publication date Dreier and Warden, 2021 Programmed temperature pyrolysis procedures Kenneth E. Peters Mary Rose Cassa 19940101 publication In: Magoon, L., and Dow, W. (eds.), 1994. The petroleum system: from Source to Trap. Am. Asso. Pet. Geol. Mem. 60, pp 93-120. https://doi.org/10.1306/M60585C5 Digital and/or Hardcopy 19940101 publication date Peters and Cassa, 1994 Source rock quality and thermal maturity generally accepted criteria Fieldwork campaigns were carried out in several sessions on the exposed outcrops of the Babouri-Figuil Basin (BFB). Systematic collection of fine-grained samples was carried out at different stratigraphic sections (Figuil, Sorawel, Lombel, Watango Pomla, Sobjoy, Golombe, Mayo Djibrila) for bulk organic geochemical analyses. Bulk organic geochemical screening was conducted on seventy-seven samples. The samples were crushed and ground to powder using a mortar and pestle. Rock powders were analyzed for total organic carbon (TOC) content at the U.S. Geological Survey’s (USGS) Petroleum Geochemistry Research Laboratory in Lakewood, Colorado. TOC was quantified using the LECO C744 carbon analyzer, after the removal of carbonates at room temperature with 6 M HCl (Oliver and Warden, 2020). Samples with TOC content > 1 wt % were submitted to programmed temperature pyrolysis using a Hydrocarbon Analysis with Kinetics (HAWK) instrument following typical procedures (e.g., Dreier and Warden, 2021). Internal laboratory quality control standards and duplicates were analyzed with the samples and all met their established acceptance criteria. The software Oasis Montage 6.4.2. was used to model the lateral distribution of some key parameters of organic geochemical screening. Using bulk organic geochemistry analyses, the various fine-grained facies were evaluated for their OM quantity, quality, and thermal maturity. For source rock quality and thermal maturity, the generally accepted criteria described by Peters and Cassa (1994) were considered. In addition, the current study modified their parameters and classified samples with TOC < 1 wt % as poor source rocks. In addition, samples with PI < 0.1 and Tmax < 435 °C were interpreted as immature. Oliver and Warden, 2020 Dreier and Warden, 2021 Peters and Cassa, 1994 2024 Total organic carbon and programmed temperature pyrolysis data with calculated thermal maturity parameters for Babouri-Figuil Basin samples.csv Comma Separated Value (CSV) file containing data. Producer Defined USGS Sample ID Unique USGS Laboratory Information Management System (LIMS) identifier Producer Defined Unique USGS Laboratory Information Management System (LIMS) identifier Outcrops Stratigraphic sections of exposed outcrops of the Babouri-Figuil Basin Producer Defined Figuil Stratigraphic section: Figuil Producer Defined Golombe Stratigraphic section: Golombe Producer Defined Mayo Djibrila Stratigraphic section: Mayo Djibrila Producer Defined Lombel Stratigraphic section: Lombel Producer Defined Sorawel Stratigraphic section: Sorawel Producer Defined Sobjoy Stratigraphic section: Sobjoy Producer Defined Watango Pomla Stratigraphic section: Watango Pomla Producer Defined Sample codes Unique sample identifier Producer Defined Unique sample identifier Lithology Type of rock analyzed Producer Defined Black Shale Sample categorized as black shale Producer Defined Calcareous Claystone Sample categorized as calcareous claystone Producer Defined Massive Claystone Sample categorized as massive claystone Producer Defined Siltstone Sample categorized as siltstone Producer Defined TOC Total organic carbon in wt % Producer Defined <0.20 Indicates total organic carbon found in sample was below detectable level Producer Defined 0.21 41.69 weight percent HI Hydrogen index, as defined by the equation (S2/TOC)*100 in milligrams HC per gram TOC Producer Defined Not Analyzed Parameter was not analyzed for this sample Producer Defined 7 1031 milligrams per gram OI Oxygen index, as defined by the equation (S3/TOC)*100 in mg CO2/g TOC Producer Defined Not Analyzed Parameter was not analyzed for this sample Producer Defined 7 96 milligrams per gram PI Production index as defined by the equation S1/(S1+S2) Producer Defined Not Analyzed Parameter was not analyzed for this sample Producer Defined 0.01 0.81 unitless Tmax The temperature at which maximum rate of generation of hydrocarbons occurs Producer Defined Not Analyzed Parameter was not analyzed for this sample Producer Defined 411 500 degrees Celsius S1 Free hydrocarbon concentration in the sample before hydrous pyrolysis, measured in milligrams of hydrocarbons per gram of rock Producer Defined Not Analyzed Parameter was not analyzed for this sample Producer Defined 0.04 7.15 milligrams per gram S2 Hydrocarbons formed during hydrous pyrolysis process as a result of thermal cracking in milligrams hydrocarbon per gram of rock Producer Defined Not Analyzed Parameter was not analyzed for this sample Producer Defined 0.07 376.49 milligrams per gram S3 The CO2 produced in hydrous pyrolysis as a result of kerogen breakdown in milligrams of CO2 per gram of rock Producer Defined Not Analyzed Parameter was not analyzed for this sample Producer Defined 0.43 4.34 milligrams per gram U.S. Geological Survey - ScienceBase mailing address

Mail Stop 302

Denver CO 80225 United States 1-888-275-8747 sciencebase@usgs.gov Unless otherwise stated, all data, metadata and related materials are considered to satisfy the quality standards relative to the purpose for which the data were collected. Although these data and associated metadata have been reviewed for accuracy and completeness and approved for release by the U.S. Geological Survey (USGS), no warranty expressed or implied is made regarding the display or utility of the data for other purposes, nor on all computer systems, nor shall the act of distribution constitute any such warranty. Any use of trade, firm, or product names is for descriptive purposes only and does not imply endorsement by the U.S. Government. Digital Data https://doi.org/10.5066/P13HEDGA None 20250307 Jeremy K. Ray U.S. Geological Survey Data Scientist mailing and physical

Mail Stop 954, 12201 Sunrise Valley

Reston Virginia 20192 USA 703-648-6415 jray@usgs.gov FGDC Content Standard for Digital Geospatial Metadata FGDC-STD-001-1998