anonymous 16352 Sample coordinates, water depth, carbonate content, and total organic carbon of inter-reef surface sediments, Spermonde Archipelago, SW Sulawesi, Indonesia Stuhr, Marleen; Kappelmann, Yannis; Mann, Thomas; Westphal, Hildegard (2026): Sample coordinates, water depth, carbonate content, and total organic carbon of inter-reef surface sediments, Spermonde Archipelago, SW Sulawesi, Indonesia [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.994068 This dataset contains geographic coordinates (latitude, longitude in decimal degrees), water depth (m), calcium carbonate content (CaCO₃, %), and total organic carbon content (TOC, %) for 51 inter-reef seafloor surface sediment samples collected across the Spermonde Archipelago, a land-attached tropical carbonate shelf off southwest Sulawesi, Indonesia. Samples were collected along cross-shelf transects spanning nearshore to offshore zones in both northern and southern sectors of the shelf. CaCO₃ was determined by the Scheibler calcimetry method (Müller & Gastner, 1971); TOC was measured following removal of inorganic carbon. These data characterise the bulk geochemical gradient across the shelf and serve as primary environmental proxies for terrestrial input and carbonate production intensity. The field sampling was performed in August 2021 in the framework of the HAnsea project, sample depths range from 4.5 to 73.6 m water depth. Data collection was done between June 2023 and April 2024. 16360 https://doi.org/10.1594/PANGAEA.994068 2026-06-29T11:04:23+0000 2026 22524 15141 15264 14657 15251 14898 22525 22526 15169 15250 22527 14181 19292 14209 14046 22528 22530 22531 22532 22533 22534 22535 22536 22537 22538 22539 22540 22541 22542 22543 22544 22545 22546 22547 22548 22549 22550 22551 22552 22553 22554 22555 22556 22557 22558 22559 22560 22561 22562 22563 22564 22565 22566 22567 22568 22569 22570 22571 22572 22573 22574 22575 22576 22577 22578 22579 23102 22581 22582 22580 23643 22586