High-Ti melts from the Taurus-Littrow Valley (TLV). A product of volcanism or impact? An ANGSA investigation using the station 3 double drive tube 73001/73002

The ANGSA initiative examined an unopened Apollo 17 double drive tube that penetrated a “light mantle” surface feature that represents a landslide deposit originating from the South Massif in the Taurus Littrow Valley. Within this double drive tube are several lunar lithologies not identified in the Apollo, Luna, Chang’e 5 or lunar meteorite collections. One such lithology is lithic fragment 73002,27G. It consists of a fine-grained, high-Ti melt lithology which hosts lithic clasts and mineral fragments derived from a variety of high-Ti basalts. This lithology represents either a quickly cooled mare basalt with xenocrysts produced by thermal erosion of older crystalline high-Ti basalts, or a high-Ti impact melt with remnants of the target lithologies. Both types of lithologies are rare to non-existent, so this new sample has the potential to shed light on either the dynamical near-surface interactions between erupting magmas and previously erupted flows, or impact processes involving hig..., A variety of lithic fragments were separated from the 73001 and 73002 cores during dissection and preliminary examination (PE). These curation activities were done in a nitrogen glove box at the Pristine Lunar Sample Laboratory Facility at the Johnson Space Center (JSC).  In the first two passes of each core, the core was dissected in 0.5 cm sampling intervals, and each segment was sieved into <1 mm and >1 mm size fractions (Fig. 3a,b). The >1 mm lithic fragments were divided into 1-2 mm, 2-4 mm, and >4 mm size fractions (Fig. 3c). Individual >4 mm lithic fragments were triple-sealed in Teflon bags (Fig. 3d), removed from the nitrogen glove box, and scanned by X-ray Computed Tomography in the X-FaCT Lab at NASA JSC with a Nikon XTH 320 equipped with a 180 kV nano-focus transmission target source (Fig. 3e). See Gross et al. (2024) and Zeigler et al. (2024) (both in this special issue but not in the reference list) for detailed descriptions about the PE and XCT scannin..., , # High-Ti melts from the Taurus-Littrow Valley (TLV). A product of volcanism or impact? An ANGSA investigation using the station 3 double drive tube 73001/73002

[https://doi.org/10.5061/dryad.dr7sqvb63](https://doi.org/10.5061/dryad.dr7sqvb63)

XCT Video of lithic fragment 73002,27G

Mineral data are presented as an Excel file.

## Description of the data and file structure

Mineral data are individual electron microprobe spot analyses of mineral grains. Lithology represents different rock units in the thin section. These units are described in the manuscript. Sample refers to the Apollo double drive tube core collected during the Apollo 17 mission at Station 3 (73002).  Mieral analyses refers to individual points on Olivine (Ol), pyroxene (Py), plagioclase (Plag), and ilmenite (Ilm). The oxide totals (SiO2, TiO2, Cr2O3.......) are presented in weight percent. For Olivine (Forsterite Fo, Fayalite Fa), Pyroxene (Enstatite En, Wollastonite Wo, Ferrosilite Fs), and Plagioclase (Albite Ab,...,

ANGSA计划对一支未开封的阿波罗17号双取芯管进行了研究，该取芯管穿透了代表金牛座利特罗山谷南地块滑坡沉积形成的"light mantle"地表特征。这支双取芯管内含有阿波罗、月球号、嫦娥五号及月球陨石馆藏中均未发现的多种月球岩性。其中一例为岩屑73002,27G。该岩性为细粒高钛熔融岩性，包含源自多种高钛玄武岩的岩屑与矿物碎屑。该岩性可归为两类：一是由古老结晶高钛玄武岩热侵蚀形成捕虏晶的快速冷却月海玄武岩，二是保留靶岩岩性残余的高钛冲击熔融岩。两类岩性均极为罕见甚至不存在，因此这一新样本有望揭示喷发岩浆与先前喷发熔岩流之间的动态近地表相互作用，或是涉及高能冲击的冲击过程（原文截断）。

在拆解与初步检查（PE）过程中，从73001与73002岩芯中分离出多种岩屑。这些样品管理工作均在约翰逊航天中心（JSC）纯净月球样品实验室的氮气手套箱内完成。对每根岩芯的前两段，以0.5 cm为采样间隔进行拆解，随后将每个岩芯段筛分至<1 mm与>1 mm两个粒级（图3a、b）。将>1 mm的岩屑进一步划分为1~2 mm、2~4 mm及>4 mm三个粒级（图3c）。将单颗>4 mm的岩屑三重密封于特氟龙（Teflon）袋中（图3d），移出氮气手套箱后，在NASA约翰逊航天中心X-FaCT实验室使用搭载180 kV纳米聚焦透射靶源的尼康XTH 320设备进行X射线计算机断层扫描（XCT）（图3e）。关于初步检查与XCT扫描的详细说明，请参阅Gross等人（2024）与Zeigler等人（2024）的研究（两篇均收录于本特刊，但未列入参考文献列表）（原文截断）。

# 金牛座利特罗山谷（TLV）的高钛熔融岩：火山作用还是冲击成因？基于3号站双取芯管73001/73002的ANGSA研究

[https://doi.org/10.5061/dryad.dr7sqvb63](https://doi.org/10.5061/dryad.dr7sqvb63)

岩屑73002,27G的XCT扫描视频

矿物数据以Excel文件格式提供。

## 数据与文件结构说明

矿物数据为矿物颗粒的电子探针微区点分析结果。岩性代表薄片中的不同岩石单元，相关单元在论文正文中已有描述。样本指阿波罗17号任务中在3号站采集的阿波罗双取芯管岩芯73002。矿物分析指针对橄榄石（Ol）、辉石（Py）、斜长石（Plag）及钛铁矿（Ilm）的单个分析点。氧化物总量（SiO₂、TiO₂、Cr₂O₃……）以重量百分比表示。针对橄榄石（镁橄榄石Fo、铁橄榄石Fa）、辉石（顽火辉石En、硅灰石Wo、铁辉石Fs）及斜长石（钠长石Ab……）（原文截断）。